Polymer
AssigneeSumitomo Chemical Company, Limited
InventorsNir Yaacobi-Gross, kIRAN KAMTEKAR
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Abstract
A polymer comprising a repeating structure of formula (I): -D-X1-A-X2-. D is a conjugated electron-donating group of formula (II); A is a conjugated electron-accepting group; X1 and X2 are each independently a conjugated bridge group selected from phenylene, thiophene, furan, thienothiophene, furofuran, thienofuran, thiazole, oxazole, alkene, alkyne and imine, each of which may be unsubstituted or substituted with one or more substituents. The polymer has a highest occupied molecular orbital (HOMO) level as measured by square wave voltammetry of no more than 5.30 eV from vacuum level. The polymer may be used as an electron donor in an organic photodetector.
Claims21
A polymer comprising a repeating structure of formula (I):
- -D-X1-A-X2- (I)
- wherein:
- D is a conjugated electron-donating group of formula (II);
- A is a conjugated electron-accepting group;
- X1 and X2 are each independently a conjugated bridge group selected from phenylene, thiophene, furan, thienothiophene, furofuran, thienofuran, thiazole, oxazole, alkene, alkyne and imine, each of which may be unsubstituted or substituted with one or more substituents:
- wherein:
- Y in each occurrence is independently O or S;
- Z is O, S or NR3 wherein R3 is H or a substituent;
- R1 in each occurrence is independently H or a substituent;
- R2 in each occurrence is independently a substituent,
- n is at least 1;
- and
- wherein the polymer has a highest occupied molecular orbital (HOMO) level as measured by square wave voltammetry of no more than 5.30 eV from vacuum level.
A polymer comprising a repeating structure of formula (I):
- -D-X1-A-X2- (I)
- wherein:
- D is a conjugated electron-donating group of formula (II);
- A is a conjugated electron-accepting group;
- X1 and X2 are each independently a conjugated bridge group selected from phenylene, thiophene, furan, thienothiophene, furofuran, thienofuran, thiazole, oxazole, alkene, alkyne and imine, each of which may be unsubstituted or substituted with one or more substituents:
- wherein:
- Y in each occurrence is independently O or S;
- Z is O, S or NR3 wherein R3 is H or a substituent;
- R1 in each occurrence is independently H or a substituent;
- R2 in each occurrence is independently a substituent,
- n is at least 1;
- and
- wherein a model of the polymer of formula H-[D-X1-A-X2]2-A has a highest occupied molecular orbital (HOMO) level as modeled using Gaussian09 with B3LYP (functional) and 6-31G (Basis set) of no more than 4.50 eV from vacuum level.
Dependencies are inferred from the claim text.