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题名: Excitation Energy Transfer in meta-Substituted Phenylacetylene Multibranched Chromophores
作者: He, Guiying1, 2, 4; Yu, Chenmin1, 3, 4; Li, Yang1, 2, 4; Hu, Jiangpu1, 2, 4; Liu, Zitong1, 3; Zhang, Deqing1, 3; Guo, Qianjin1, 2; Xia, Andong1, 2
关键词: chromophores ; conjugation ; energy transfer ; FRET ; substituent effects
刊名: CHEMISTRY-AN ASIAN JOURNAL
发表日期: 2016-10-01
卷: 11, 期:19, 页:2741-2748
收录类别: SCI
英文摘要: A comprehensive investigation into the spectral properties and excitation energy transfer in di- or tri- branched dithienyldiketopyrrolopyrrole (DPP) molecules with meta-substituted benzene as a central core (TADPP2-TT and TADPP3), by means of steady-state and transient measurements and quantum chemical calculations, is reported. Excitation in the meta-substituted chromophores is localized on one of the DPP units in the branching molecules owing to the disruption of conjugation by meta substitution for both TADPP2-TT and TADPP3. Weak electronic couplings result from the long distance between the DPP chromophores and the steric effects from the attached side chains on DPP. The attachment of the acetylene linker in each branch, which has a very low twisting barrier, could also play an important role in reducing the interaction between DPP chromophores. The dynamics of the excited states show that excitation energy transfer occurs on the picosecond scale, which is attributed to the incoherent hopping mechanism.
语种: 英语
内容类型: 期刊论文
URI标识: http://ir.iccas.ac.cn/handle/121111/35107
Appears in Collections:光化学实验室_期刊论文

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作者单位: 1.Chinese Acad Sci, BNLMS, Beijing 100190, Peoples R China
2.Chinese Acad Sci, Key Lab Photochem, Inst Chem, Beijing 100190, Peoples R China
3.Chinese Acad Sci, Inst Chem, Lab Organ Solid, Beijing 100190, Peoples R China
4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
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