应用广泛的一种化合物是2,5-二己基-3,6-二(噻吩-2-基)吡咯并[3,4-C]吡咯-1,4(2H,5H)-二酮,它可用作有机合成中间体和医药中间体,在实验室研发过程及化工生产中得到广泛应用。
中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
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—— | 3,6-dithiophen-2-yl-2,5-dihydropyrrolo[3,4-c]pyrrole-1,4-dione | —— | C14H8N2O2S2 | 300.362 |
中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
3,6-双(5-溴-2-噻吩)-2,5-二己基-2,5-二氢-吡咯并[3,4-c]吡咯-1,4-二酮 | 3,6-bis(5-bromothiophen-2-yl)-2,5-dihexyl-2,5-dihydropyrrolo[3,4-c]pyrrole-1,4-dione | 1214906-01-0 | C26H30Br2N2O2S2 | 626.476 |
Three centrosymmetric diketopyrrolopyrroles possessing either two 2-(2′-methoxyphenyl)benzothiazole or two 2-(2′-methoxyphenyl)benzoxazolo-thiophene scaffolds were synthesized in a straightforward manner, and their photophysical properties were investigated. Their emission was significantly bathochromically shifted as compared with that of simple DPPs reaching 650 nm. Judging from theoretical calculations performed with time-dependent density functional theory, in all three cases the excited state was localized on the DPP core and there was no significant CT character. Consequently, emission was almost independent of solvents’ polarity. DPPs possessing 2,5-thiophene units vicinal to DPP core play a role in electronic transitions, resulting in bathochromically shifted absorption and emission. Interestingly, as judged from transient absorption dynamics, intersystem crossing was responsible for the deactivation of the excited states of DPPs possessing para linkers but not in the case of dye bearing meta linker.