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题名: Localized Emitting State and Energy Transfer Properties of Quadrupolar Chromophores and (Multi)Branched Derivatives
作者: Yan, Linyin1, 2;  Chen, Xudong1, 2;  He, Qingguo1, 2;  Wang, Yingying1, 2;  Wang, Xuefei1, 2;  Guo, Qianjin1, 2;  Bai, Fenglian1, 2;  Xia, Andong1, 2;  Aumiler, Damir1, 3;  Vdovic, Silvije1, 3;  Lin, ShengHien4
刊名: JOURNAL OF PHYSICAL CHEMISTRY A
发表日期: 2012-08-30
DOI: 10.1021/jp305407s
卷: 116, 期:34, 页:8693-8705
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Chemistry, Physical ;  Physics, Atomic, Molecular & Chemical
研究领域[WOS]: Chemistry ;  Physics
英文摘要: In order to better understand the nature of intramolecular charge and energy transfer in multibranched molecules, we have synthesized and studied the photophysical properties of a monomer quadrupolar chromophore with donor-acceptor-donor (D-A-D) electronic push-pull structure, together with its V-shaped dimer and star-shaped trimers. The comparison of steady-state absorption spectra and fluorescence excitation anisotropy spectra of these chromophores show evidence of weak interaction (such as charge and energy transfer) among the branches. Moreover, similar fluorescence and solvation behavior of monomer and branched chromophores (dimer and trimer) implies that the interaction among the branches is not strong enough to make a significant distinction between these molecules, due to the weak interaction and intrinsic structural disorder in branched molecules. Furthermore, the interaction between the branches can be enhanced by inserting pi bridge spacers (-C=C- or -C C-) between the core donor and the acceptor. This improvement leads to a remarkable enhancement of two photon cross sections, indicating that the interbranch interaction results in the amplification of transition dipole moments between ground states and excited states. The interpretations of the observed photophysical properties are further supported by theoretical investigation, which reveal that the changes of the transition dipole moments of the branched quadrupolar chromophores play a critical role in observed the two-photon absorption (2PA) cross-section for an intramolecular charge transfer (ICT) state interaction in the multibranched quadrupolar chromophores.
关键词[WOS]: 2-PHOTON ABSORPTION PROPERTIES ;  EXCITATION CROSS-SECTIONS ;  POLYMERS INCORPORATING 2,2'-BIPYRIDINES ;  INTRAMOLECULAR CHARGE-TRANSFER ;  NONLINEAR-OPTICAL PROPERTIES ;  PHOTOPHYSICAL PROPERTIES ;  MULTIPHOTON ABSORPTION ;  TRIPHENYLBENZENE DERIVATIVES ;  MULTIBRANCHED STRUCTURES ;  ORGANIC CHROMOPHORES
语种: 英语
WOS记录号: WOS:000308119800005
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/142985
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Inst Chem, State Key Lab Mol React Dynam, Beijing 100190, Peoples R China
2.Chinese Acad Sci, Inst Chem, Beijing Natl Lab Mol Sci BNLMS, Beijing 100190, Peoples R China
3.Inst Phys, Zagreb 10000, Croatia
4.Natl Chiao Tung Univ, Dept Appl Chem, Hsinchu 30010, Taiwan

Recommended Citation:
Yan, Linyin,Chen, Xudong,He, Qingguo,et al. Localized Emitting State and Energy Transfer Properties of Quadrupolar Chromophores and (Multi)Branched Derivatives[J]. JOURNAL OF PHYSICAL CHEMISTRY A,2012,116(34):8693-8705.
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