WO2013111512A1 - 有機系太陽電池用色素材料の分析方法及び精製方法 - Google Patents
有機系太陽電池用色素材料の分析方法及び精製方法 Download PDFInfo
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- WO2013111512A1 WO2013111512A1 PCT/JP2012/084120 JP2012084120W WO2013111512A1 WO 2013111512 A1 WO2013111512 A1 WO 2013111512A1 JP 2012084120 W JP2012084120 W JP 2012084120W WO 2013111512 A1 WO2013111512 A1 WO 2013111512A1
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- dye
- group
- analysis method
- sample
- acid
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- 238000004458 analytical method Methods 0.000 title claims abstract description 21
- 238000000034 method Methods 0.000 title claims description 17
- 238000000746 purification Methods 0.000 title description 19
- 239000000463 material Substances 0.000 claims abstract description 35
- 238000000926 separation method Methods 0.000 claims abstract description 29
- 239000000523 sample Substances 0.000 claims abstract description 27
- 238000012856 packing Methods 0.000 claims abstract description 19
- 239000002253 acid Substances 0.000 claims abstract description 17
- 239000003480 eluent Substances 0.000 claims abstract description 15
- 238000003953 normal phase liquid chromatography Methods 0.000 claims abstract description 8
- 239000012488 sample solution Substances 0.000 claims abstract description 6
- 239000003960 organic solvent Substances 0.000 claims abstract description 5
- 239000003495 polar organic solvent Substances 0.000 claims abstract description 4
- 239000002904 solvent Substances 0.000 claims description 26
- 239000007788 liquid Substances 0.000 claims description 20
- DTQVDTLACAAQTR-UHFFFAOYSA-N Trifluoroacetic acid Chemical compound OC(=O)C(F)(F)F DTQVDTLACAAQTR-UHFFFAOYSA-N 0.000 claims description 12
- 238000001514 detection method Methods 0.000 claims description 9
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims description 6
- BDAGIHXWWSANSR-UHFFFAOYSA-N methanoic acid Natural products OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 claims description 6
- 125000003277 amino group Chemical group 0.000 claims description 5
- 125000004093 cyano group Chemical group *C#N 0.000 claims description 4
- 239000000945 filler Substances 0.000 claims description 4
- 239000000049 pigment Substances 0.000 claims description 4
- 150000003839 salts Chemical class 0.000 claims description 4
- OSWFIVFLDKOXQC-UHFFFAOYSA-N 4-(3-methoxyphenyl)aniline Chemical compound COC1=CC=CC(C=2C=CC(N)=CC=2)=C1 OSWFIVFLDKOXQC-UHFFFAOYSA-N 0.000 claims description 3
- 235000019253 formic acid Nutrition 0.000 claims description 3
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims 3
- 239000000975 dye Substances 0.000 description 54
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 15
- LTNAYKNIZNSHQA-UHFFFAOYSA-L 2-(4-carboxypyridin-2-yl)pyridine-4-carboxylic acid;ruthenium(2+);dithiocyanate Chemical compound N#CS[Ru]SC#N.OC(=O)C1=CC=NC(C=2N=CC=C(C=2)C(O)=O)=C1.OC(=O)C1=CC=NC(C=2N=CC=C(C=2)C(O)=O)=C1 LTNAYKNIZNSHQA-UHFFFAOYSA-L 0.000 description 12
- 230000003993 interaction Effects 0.000 description 8
- 238000001179 sorption measurement Methods 0.000 description 8
- 230000002378 acidificating effect Effects 0.000 description 7
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 7
- 238000005194 fractionation Methods 0.000 description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 description 6
- 238000004587 chromatography analysis Methods 0.000 description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 150000007513 acids Chemical class 0.000 description 4
- WEVYAHXRMPXWCK-UHFFFAOYSA-N Acetonitrile Chemical compound CC#N WEVYAHXRMPXWCK-UHFFFAOYSA-N 0.000 description 3
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 3
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 239000002585 base Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 3
- MUBZPKHOEPUJKR-UHFFFAOYSA-N oxalic acid group Chemical group C(C(=O)O)(=O)O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 2
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 2
- 125000006615 aromatic heterocyclic group Chemical group 0.000 description 2
- 125000004432 carbon atom Chemical group C* 0.000 description 2
- 150000004696 coordination complex Chemical class 0.000 description 2
- 238000004925 denaturation Methods 0.000 description 2
- 230000036425 denaturation Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 239000003446 ligand Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 150000007524 organic acids Chemical class 0.000 description 2
- 229910052762 osmium Inorganic materials 0.000 description 2
- -1 phosphoryl group Chemical group 0.000 description 2
- 238000004366 reverse phase liquid chromatography Methods 0.000 description 2
- 229910052707 ruthenium Inorganic materials 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 229910052725 zinc Inorganic materials 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910052684 Cerium Inorganic materials 0.000 description 1
- 229910052692 Dysprosium Inorganic materials 0.000 description 1
- 229910052691 Erbium Inorganic materials 0.000 description 1
- 229910052693 Europium Inorganic materials 0.000 description 1
- 230000005526 G1 to G0 transition Effects 0.000 description 1
- 229910052688 Gadolinium Inorganic materials 0.000 description 1
- 229910052689 Holmium Inorganic materials 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 229910052779 Neodymium Inorganic materials 0.000 description 1
- 206010034972 Photosensitivity reaction Diseases 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- 229910052777 Praseodymium Inorganic materials 0.000 description 1
- 229910052772 Samarium Inorganic materials 0.000 description 1
- 229910052771 Terbium Inorganic materials 0.000 description 1
- 229910052776 Thorium Inorganic materials 0.000 description 1
- 229910052775 Thulium Inorganic materials 0.000 description 1
- 229910052769 Ytterbium Inorganic materials 0.000 description 1
- 238000002835 absorbance Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000000274 adsorptive effect Effects 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 229910052787 antimony Inorganic materials 0.000 description 1
- 229910052785 arsenic Inorganic materials 0.000 description 1
- 125000004429 atom Chemical group 0.000 description 1
- 150000001555 benzenes Chemical class 0.000 description 1
- 229910052797 bismuth Inorganic materials 0.000 description 1
- 229910052793 cadmium Inorganic materials 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 150000001721 carbon Chemical class 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 150000001735 carboxylic acids Chemical class 0.000 description 1
- 150000001768 cations Chemical class 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 150000004292 cyclic ethers Chemical class 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 150000002009 diols Chemical class 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010828 elution Methods 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 150000002170 ethers Chemical class 0.000 description 1
- 229910052733 gallium Inorganic materials 0.000 description 1
- 229910052732 germanium Inorganic materials 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 229910052735 hafnium Inorganic materials 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 229910052738 indium Inorganic materials 0.000 description 1
- 229910052741 iridium Inorganic materials 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 150000002576 ketones Chemical class 0.000 description 1
- 229910052746 lanthanum Inorganic materials 0.000 description 1
- 229910052745 lead Inorganic materials 0.000 description 1
- 238000004811 liquid chromatography Methods 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 229910052758 niobium Inorganic materials 0.000 description 1
- 150000002825 nitriles Chemical class 0.000 description 1
- 125000004433 nitrogen atom Chemical group N* 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 235000006408 oxalic acid Nutrition 0.000 description 1
- 229910052763 palladium Inorganic materials 0.000 description 1
- 238000005191 phase separation Methods 0.000 description 1
- 150000003009 phosphonic acids Chemical class 0.000 description 1
- 230000036211 photosensitivity Effects 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 239000002798 polar solvent Substances 0.000 description 1
- 125000004424 polypyridyl Polymers 0.000 description 1
- 150000004033 porphyrin derivatives Chemical class 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 238000004237 preparative chromatography Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
- 229910052702 rhenium Inorganic materials 0.000 description 1
- 229910052703 rhodium Inorganic materials 0.000 description 1
- 238000005464 sample preparation method Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910052712 strontium Inorganic materials 0.000 description 1
- 150000003460 sulfonic acids Chemical class 0.000 description 1
- 125000000472 sulfonyl group Chemical group *S(*)(=O)=O 0.000 description 1
- 229910052715 tantalum Inorganic materials 0.000 description 1
- 229910052713 technetium Inorganic materials 0.000 description 1
- 125000005207 tetraalkylammonium group Chemical group 0.000 description 1
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 1
- 229910052716 thallium Inorganic materials 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- 229910052727 yttrium Inorganic materials 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
- G01N30/80—Fraction collectors
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
- C09B57/00—Other synthetic dyes of known constitution
- C09B57/10—Metal complexes of organic compounds not being dyes in uncomplexed form
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
- G01N30/88—Integrated analysis systems specially adapted therefor, not covered by a single one of the groups G01N30/04 - G01N30/86
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K71/00—Manufacture or treatment specially adapted for the organic devices covered by this subclass
- H10K71/311—Purifying organic semiconductor materials
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K85/00—Organic materials used in the body or electrodes of devices covered by this subclass
- H10K85/30—Coordination compounds
- H10K85/341—Transition metal complexes, e.g. Ru(II)polypyridine complexes
- H10K85/344—Transition metal complexes, e.g. Ru(II)polypyridine complexes comprising ruthenium
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
- G01N2030/022—Column chromatography characterised by the kind of separation mechanism
- G01N2030/027—Liquid chromatography
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
- G01N30/88—Integrated analysis systems specially adapted therefor, not covered by a single one of the groups G01N30/04 - G01N30/86
- G01N2030/8809—Integrated analysis systems specially adapted therefor, not covered by a single one of the groups G01N30/04 - G01N30/86 analysis specially adapted for the sample
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G9/00—Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
- H01G9/20—Light-sensitive devices
- H01G9/2059—Light-sensitive devices comprising an organic dye as the active light absorbing material, e.g. adsorbed on an electrode or dissolved in solution
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/549—Organic PV cells
Definitions
- the present invention relates to an analysis method and a preparative purification method of a dye material for organic solar cells, and specifically relates to an analysis performed for, for example, testing and quality control, and preparative purification in the final stage of a manufacturing process. It is.
- the organic solar cell dye material is a molecular dye used as a sensitizer in a dye-sensitized solar cell.
- the sample is converted to a water-soluble form by adding alkali to a sample containing molecular dyes that do not reach the desired purity, and purified by reverse-phase chromatography.
- Patent Document 1 A method has been proposed (Patent Document 1).
- an object of the present invention is to make it possible to analyze or purify a dye material for an organic solar cell without deteriorating it.
- the present invention is intended to perform separation for analysis or preparative purification of organic solar cell dyes in a separation system that does not use water. Chromatography by the normal phase method, which is a high separation method that does not use water. Use graphics.
- the dye material for organic solar cells to be analyzed in the present invention is an acidic compound having one or more acidic groups such as carboxyl groups. Therefore, when the normal phase method is used, the column packing material, which is a stationary phase, is higher in polarity than the mobile phase in general conditions. The problem that it cannot be obtained arises.
- the conditions of normal phase chromatography are adjusted as follows in order to separate the dye material which is an acidic compound.
- the base material is modified with a polar group. Then, the type of the polar modifying group is selected depending on the degree of adsorption of the dye material as a sample.
- Eluent containing polar organic solvent and acid is used.
- the solvent ratio of the eluent and the type and ratio of the acid are adjusted according to the degree of sample adsorption.
- the analysis method of the present invention is a method for analyzing a dye from a sample containing a dye for a dye-sensitized solar cell, (A) providing a sample solution in which the sample is dissolved in an organic solvent; (B) a step of separating the sample solution by normal phase liquid chromatography; and (C) a step of detecting the separated components.
- This analysis method includes a preparative purification method in which after the detection step (C), a step of preparating the target dye is further provided based on the detection result, thereby performing preparative purification of the dye.
- the target dye is a dye for a dye-sensitized solar cell, which is a metal complex having one or more aromatic heterocyclic ligands.
- the aromatic heterocyclic ligand in the metal complex is a polypyridyl derivative or a porphyrin derivative, and contains one or more nitrogen atoms bonded to the metal.
- the metals are Mg, Ca, Sr, Ba, Sc, Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Ti, Zr, Hf, V, Nb, Ta, Th, Cr, Mo, W, Mn, Tc, Re, Fe, Ru, Os, Co, Rh, Ir, Ni, Pd, Pt, Cu, Ag, Au, Zn, Cd, Hg, Al, Ga, In, Tl, Si, Ge, Sn, Pb, As, Sb or Bi, among which Ru, Os or Zn is preferable.
- this dye has one or more acidic groups.
- the acidic group is a carboxyl group, a sulfonyl group or a phosphoryl group, preferably a carboxyl group. Depending on the state, part or all of the acidic group forms a salt with a monovalent cation such as tetraalkylammonium, ammonium, sodium or potassium.
- the hydroxyl group, cyano group or amino group is preferable as the modifying group of the column packing material.
- the modification of one column packing material is not limited to one type, and two or more types may be used simultaneously. These modifying groups are selected based on the degree of adsorption of the dye material.
- the modification group of the column packing material is a guide only because the interaction with the sample column packing material becomes stronger in the order of amino group> hydroxyl group> cyano group.
- a cyano group or hydroxyl group having a weaker interaction is used as the modifying group of the material, and an amino group or hydroxyl group having a stronger interaction is used as the modifying group of the column packing material for the dye having weak adsorption.
- the amino group as the modifying group of the column packing material may not be used properly because the interaction with the carboxyl group of the dye is too strong.
- the solvent used as the eluent is an organic solvent containing 1 to 8 carbon (C) atoms or a mixture thereof.
- organic solvents are preferably nitriles such as acetonitrile, alcohols such as methanol, cyclic ethers such as tetrahydrofuran, ethers such as diethyl ether, ketones such as acetone, halogenated carbon such as dichloromethane, toluene and the like.
- elution is accelerated by using a large amount of a highly polar solvent.
- the dye is actually analyzed by liquid chromatography using the solvent, and the solvent is determined by confirming the state of separation.
- the acidic group contained in the dye strongly interacts with the column packing material, so that sufficient column separation cannot be achieved with the above solvent alone. Therefore, one or more acids are added to the solvent. This suppresses the interaction between the acidic group of the dye and the column packing material, and improves the separation performance.
- the acid to be added is an organic acid containing 1 to 4 C atoms, preferably carboxylic acids such as formic acid and trifluoroacetic acid, sulfonic acids, and phosphonic acids. It may be an organic acid having two or more acidic groups such as oxalic acid. These acid salts may be used.
- the acid contained in the eluent is not limited to one type, and two or more types may be added simultaneously. These acids or their salts are also selected based on the degree of adsorption of the dye material. For example, it is necessary to select an acid having higher acidity as the acid added to the solvent as the number of carboxyl groups contained in the dye increases.
- the solvent When the present invention is carried out as a purification method, the solvent must be removed after fractionation. Therefore, from the viewpoint of removing the solvent, it is advantageous that the solvent has high volatility. Therefore, as the acid added to the solvent, A smaller number of carbon atoms is preferred. Therefore, first confirm with formic acid, try trifluoroacetic acid in consideration of resolution and peak shape, and finally determine the acid to be added and the concentration to be added by looking at the actually obtained data.
- acid is added at a concentration of 0.01% to 5% with respect to the solvent. If the interaction is strong, add it at a high concentration. When the interaction is small, it may be added at a low concentration, but it may be added at a high concentration.
- the present invention even in the case of normal phase chromatography, by using a modified column packing material and adding an acid to the eluent, it is possible to control the adsorptive power of the dye to the packing material and obtain a sufficient separation. become able to.
- the present invention eliminates the need to use water as an eluent in order to use normal phase chromatography, and the dye material is unstable with respect to water. Is not denatured by water.
- the present invention is applied to a preparative purification method, denaturation after purification can be prevented, and when the present invention is applied to an analysis method, denaturation during analysis can be prevented and stable analysis can be performed. It becomes like this.
- the dye is synthesized in the manufacturing process, purified by a preparative system, and supplied to the market after purification.
- the purity of the dye after purification is often not sufficient as a dye for use in organic solar cells.
- many isomers are not sufficiently removed.
- the higher the purity the better.
- the preparative purification method of the present invention can be applied as a method for improving the purity of a dye provided on the market containing such impurities and making it suitable for use in an organic solar cell.
- the dye after being synthesized in the manufacturing process contains impurities, it needs to be preparatively purified before being provided to the market.
- the preparative purification method of the present invention can also be applied to a preparative purification process prior to market provision.
- N3 dye used in an organic solar cell is taken up as a sample of one embodiment and separated and analyzed by high performance liquid chromatograph is shown below.
- Preparative purification and analysis by liquid chromatograph share the same separation process and detection, and the only difference is whether or not to perform separation based on the result after detection.
- analysis conditions can be applied as it is to preparative chromatography which is a later example.
- N3 dye The structural formula of N3 dye is shown in FIG. 1A. N3 dyes are known to have isomers. The structural formula of the isomer is shown in FIG. 1B. Both dyes have four carboxyl groups and are strongly adsorbed on silica fillers commonly used in normal phase chromatography.
- sample preparation method A commercially available N3 dye is dissolved in methanol to a concentration of 1 mg / mL.
- the solvent for dissolving the sample dye is not limited to methanol.
- the solvent is preferably the same as the mobile phase under the preparative or analytical conditions in the subsequent preparative liquid chromatograph, or contains a part of the components constituting the mobile phase. If the solvent (sample solvent) that dissolves the dye is not compatible with the mobile phase, the dye solution and the mobile phase are not mixed with each other, so that there is a possibility that the separation is not performed normally.
- the sample solvent in order to inject a large amount of dye solution during preparative purification, when a solvent having a higher dissolution power than that of the mobile phase (generally a solvent having a higher polarity) is used as the sample solvent, the sample is used as the mobile phase.
- the separation may not be performed normally by being separated by the sample solvent.
- the polarity of the sample solvent is not higher than that of the mobile phase.
- a liquid chromatograph As an apparatus for separating the N3 dye, for example, a liquid chromatograph can be used, and a high-speed liquid chromatograph is preferable.
- An outline of a liquid chromatograph used in one embodiment is shown in FIG.
- a liquid feed pump 2 is provided to supply the eluent from the eluent reservoir 1 to the separation column 4 for separating the sample components, and the sample is injected into the eluent flow path leading to the separation column 4.
- a sample injection device 3 is provided.
- a detector 5 is provided in the flow path connected to the outlet of the separation column 4. The eluate that has passed through the detector 5 is discharged to the drain.
- the adsorption of the dye to the column packing material is suppressed by the modifying group.
- the eluent contains trifluoroacetic acid. Trifluoroacetic acid competitively inhibits the action of the carboxyl group of the dye on the column packing material and suppresses the adsorption of the dye to the column packing material. Thus, high separation of the dye can be achieved by controlling the effect of suppressing the adsorption of the dye to the column packing material.
- FIG. 3 shows a chromatogram obtained when the apparatus of FIG. 2 was used for separation under the above separation conditions.
- the peak indicated by reference numeral 6 in FIG. 3 is the N3 dye shown in FIG. 1A
- the peak indicated by reference numeral 7 is the isomer of the N3 dye shown in FIG. 1B.
- the present invention can separate the N3 dye from its isomer. If the separated N3 dye is separated, the purity of the N3 dye can be increased as preparative purification.
- a preparative liquid chromatograph is a high-performance liquid chromatograph equipped with a preparative device.
- the preparative liquid chromatograph includes a separation column 4, a liquid feed pump 2 that feeds the mobile phase contained in the mobile phase container 1 to the separation column 4, and an injector that injects a sample into the mobile phase flow path to the separation column 4. 3.
- a detector 5 for detecting a sample component from the separation column 4 and a fractionation device are provided.
- the fractionation device is a fraction collector 10 of a fractionation mechanism that collects the eluted sample components after passing through the detector 5 in a fractionation container, and a fraction that controls the operation of the fraction collector 10 based on the detection signal of the detector 5.
- a control device 12 is provided.
- the preparative control device 12 can be realized as being incorporated in a control device composed of a computer dedicated to preparative liquid chromatograph for performing the operation and data processing of the preparative liquid chromatograph. In addition to the control device, it can be realized by a dedicated CPU only for the sorting device or a general-purpose personal computer.
- the fraction collector 10 is provided with a switching valve and a test tube as a sorting container.
- the sample is injected from the injector 3 into the flow path, sent to the separation column 4 by the mobile phase, and separated and eluted.
- the detector 5 is an optical detector, for example, the absorbance or fluorescence chromatogram of a specific wavelength is monitored, and the sorting control device 12 is based on the detection signal of the detector 5 at that specific wavelength. Valve switching control of the fraction collector 10 is performed.
- the fractionation is performed under light-shielded conditions in order to prevent the fractionated dye from being modified by light.
- a light shielding method for example, the vicinity of the fractionation container of the fraction collector 10 is darkened, or the solvent is replaced or removed in place of the fraction collector 10 in order to separate the separated dye.
- a method of providing a trap column to be performed and trapping the separated dye in the trap column can be employed.
- N3 dye is taken up as the dye for the dye-sensitized solar cell, but other dyes for the dye-sensitized solar cell have the same polarity as the N3 dye, so that the present invention is similarly applied. Can be applied.
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Abstract
Description
そこで、本発明は、有機系太陽電池用の色素材料を劣化させることなく分析又は精製できるようにすることを目的とするものである。
(A)前記試料を有機溶媒に溶解した試料溶液を提供する工程、
(B)前記試料溶液を順相液体クロマトグラフィーにより分離する工程、及び
(C)分離された成分を検出する工程
を含む。
(B1)極性をもつ修飾基によって修飾された基材をカラム充填材とした分離カラムを使用し、
(B2)極性有機溶媒に酸を含有した溶媒を溶離液とするものであること
を特徴としている。
ただし、実際にはカラム充填材の修飾基としてのアミノ基については色素のカルボキシル基との相互作用が強すぎるため、用いることが適当でない場合がある。
市販のN3色素を1mg/mLの濃度になるようにメタノールに溶解させる。試料の色素を溶解する溶媒はメタノールに限定されない。溶媒としては、後段である分取液体クロマトグラフにおける分取条件又は分析条件の移動相と同じか、もしくは、移動相を構成する成分のうち一部を含んでいるものが好ましい。色素を溶解する溶媒(試料溶媒)と移動相とで相溶性が無い場合には、色素溶液と移動相とが混ざり合わないために正常に分離がなされないおそれがある。また、分取精製時には大量の色素溶液を注入するために、移動相より溶出力が高い溶媒(一般的にはより極性の高い溶媒)を試料溶媒として用いている場合には、試料が移動相ではなく試料溶媒によって分離されることにより、正常に分離がなされないおそれがある。これを防ぐために、試料溶媒は移動相を構成する成分と同じものあるいは移動相を構成する成分のうち一部を含んでいるものを用いることが望ましい。さらに、移動相より試料溶媒の極性が高いことが無いようにすることが望ましい。
試料:N3のメタノール溶液
注入量:lμL
カラム:LiChrocart125-4 LiChrosphere lOO Diol(5μm)
溶離液:ジクロロメタン/メタノール/トリフルオロ酢酸=90/10/1
流量:lmL/min
検出波長:548nm
使用したカラムは充填材であるシリカ基材がヒドロキシル基を有する修飾基によって修飾されている。その修飾基の一例は、下の構造式に示すものである。
2 送液ポンプ
3 インジェクタ
4 分離カラム
5 検出器
10 フラクションコレクタ
12 分取制御装置
Claims (5)
- 色素増感型太陽電池用の色素を含む試料から前記色素を分析する方法において、
(A)前記試料を有機溶媒に溶解した試料溶液を提供する工程、
(B)前記試料溶液を順相液体クロマトグラフィーにより分離する工程、及び
(C)分離された成分を検出する工程
を含み、
前記順相液体クロマトグラフィーは、
(B1)極性をもつ修飾基によって修飾された基材をカラム充填材とした分離カラムを使用し、
(B2)極性有機溶媒に酸を含有した溶媒を溶離液とするものであること
を特徴とする分析方法。 - 前記順相液体クロマトグラフィーを高速液体クロマトグラフにより行う請求項1に記載の分析方法。
- カラム充填材の前記修飾基は、ヒドロキシル基、シアノ基及びアミノ基からなる群から選ばれた1種又は2種以上である請求項1又は2に記載の分析方法。
- 溶離液に含まれる前記酸は、酢酸、蟻酸、トリフルオロ酢酸及びそれらの塩からなる群から選ばれた1種又は2種以上である請求項1から3のいずれか一項に記載の分析方法。
- 前記検出工程(C)の後、検出結果に基づいて目的とする色素を分取する工程をさらに備えて色素の分取精製を行う請求項1から4のいずれか一項に記載の分析方法。
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