Time-Resolved Fluorescence Study of Aggregation-Induced Emission Enhancement by Restriction of Intramolecular Charge Transfer State

被引：197

作者：

Gao, Bing-Rong ^{[1
]}

Wang, Hai-Yu ^{[1
]}

Hao, Ya-Wei ^{[1
,2
]}

Fu, Li-Min ^{[3
]}

Fang, Hong-Hua ^{[1
]}

Jiang, Ying ^{[1
]}

Wang, Lei ^{[1
,2
]}

Chen, Qi-Dai ^{[1
]}

Xia, Hong ^{[1
]}

Pan, Ling-Yun ^{[1
,2
]}

Ma, Yu-Guang ^{[4
]}

Sun, Hong-Bo ^{[1
,2
]}

机构：

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

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

[3] Renmin Univ China, Dept Chem, Beijing 100872, Peoples R China

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

来源：

JOURNAL OF PHYSICAL CHEMISTRY B | 2010年 / 114卷 / 01期

关键词：

EXCITED-STATE; TRANSIENT ABSORPTION; DIPOLE-MOMENTS; LASER-DYES; DYNAMICS; TICT; DERIVATIVES; SEPARATION; EFFICIENCY; CRYSTAL;

D O I：

10.1021/jp909063d

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：

Cyano-substituted oligo (alpha-phenylenevinylene)-1,4-bis(R-cyano-4-diphenylaminostyryl)-2,5-diphenylbenzene (CNDPASDB) molecules are Studied in solution and aggregate state by time-resolved fluorescence techniques. CNDPASDB exhibits a strong solvent polarity dependent characteristic of aggregation-induced emission (AIE). By time-dependent spectra, the gradual transition from local excited state to intramolecular charge transfer state with the increasing solvent polarity is clearly resolved. The transition time in high polarity solvent DMF is very fast, around 0.5 ps, resulting in a low fluorescence quantum yield. While in aggregate state, the intramolecular torsion is restricted and the local environment becomes less polar. Thus, the intramolecular charge transfer state is eliminated and efficient AIE Occurs.

引用

页码：128 / 134

页数：7

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