178924-20-4Relevant articles and documents
A diketopyrrolopyrrole-based low bandgap polymer with enhanced photovoltaic performances through backbone twisting
Wen, Shuguang,Chen, Weichao,Fan, Meijie,Duan, Linrui,Qiu, Meng,Sun, Mingliang,Han, Liangliang,Yang, Renqiang
, p. 18174 - 18180 (2016)
A diketopyrrolopyrrole (DPP)-based π-conjugated polymer is a very promising low band gap electron donor material for polymer solar cells. We have incorporated alkyl groups into the 4-position of the thiophene rings connected to the DPP fragment, which is proven to be beneficial for improving the open-circuit voltage (VOC) and short-circuit current density (JSC). Two DPP-based polymers are synthesized with benzo[1,2-b:4,5-b′]dithiophene (BDT) as the electron-donating segment. Both the polymers show good solubility, slightly wide optical band gaps and deep HOMO energy levels when incorporating the alkyl groups. Heterojunction solar cells are fabricated with polymer:PC71BM as the active layer. VOC and JSC are simultaneously enhanced compared to the device performance of traditional DPP-BDT alternating polymers. A power conversion efficiency (PCE) of 8.11% was obtained, which indicates that rational utilization of backbone torsion is a promising strategy to improve the photovoltaic performance.
HETEROARYLAMIDE LOWER CARBOXYLIC ACID DERIVATIVE
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Page/Page column 195, (2009/02/10)
To provide a novel compound which has S1P receptor agonistic activity, exhibits excellent immunosuppressing effect, gives less adverse side effects, and can be orally administered. The invention provides a compound represented by general formula (I) (wherein A is a single bond, -O-, or - CH2-; R1 represents a hydrogen atom or a C1-C6 alkyl group, and V represents any one group selected from among the following groups (1) to (3) : (1) -G1-, (2) -G2-N(R2) -G3-, and (3) a group represented by formula 2, wherein each of Z1 and Z2 represents a hydrogen atom or a C1-C6 alkyl group, Z3 represents a hydrogen or the like, Q represents -CH2-O- or the like, and Y represents a group represented by foumula 3, a salt thereof, or a solvate thereof.