Comparative Time-Resolved Study of Two Aggregation-Induced Emissive Molecules

被引：46

作者：

Gao, Bing-Rong ^{[1
]}

Wang, Hai-Yu ^{[1
]}

Yang, Zhi-Yong ^{[1
,3
]}

Wang, Hai ^{[1
,3
]}

Wang, Lei ^{[1
,3
]}

Jiang, Ying ^{[1
]}

Hao, Ya-Wei ^{[1
,3
]}

Chen, Qi-Dai ^{[1
]}

Li, Yu-Peng ^{[2
]}

Ma, Yu-Guang ^{[2
]}

Sun, Hong-Bo ^{[1
,3
]}

机构：

[1] Jilin Univ, Coll Elect Sci & Engn, State Key Lab Integrated Optoelect, Changchun 130012, Peoples R China

[2] Jilin Univ, Coll Chem, State Key Lab Supramol Struct & Mat, Changchun 130012, Peoples R China

[3] Jilin Univ, Coll Phys, Changchun 130023, Peoples R China

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2011年 / 115卷 / 32期

基金：

美国国家科学基金会;

关键词：

INTRAMOLECULAR CHARGE-TRANSFER; AMPLIFIED SPONTANEOUS EMISSION; SLAB ORGANIC-CRYSTALS; ENHANCED EMISSION; EXCITED-STATE; FLUORESCENCE; DERIVATIVES; PHOTOLUMINESCENCE; EFFICIENCY; VINYLENE);

D O I：

10.1021/jp2027753

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Femtosecond time-resolved measurements are conducted on two aggregation-induced emissive molecules: cyano-substituted oligo-(alpha-phenylenevinylene)-1,4-bis(R-cyano-4-diphenylaminostyryl)-2,5-diphenylbenzene (CNDPASDB) and cyano-substituted oligo(p-phenylenevinylene) (CNDPDSB). By examining whether the photoluminescence decay is accompanied by ground state bleaching recovery, different mechanisms for their low emission in solution state are revealed. For CNDPASDB with donor/acceptor group, the interconversion from the highly emissive local excited state to the relatively dark intramolecular charge transfer state results in the low emission. For CNDPDSB without electron donor group, there is no intermediate dark state, and the low emission is caused by the efficient vibrational/torsional nonradiative relaxation.

引用

收藏

页码：16150 / 16154

页数：5

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