Enhanced emission efficiency and excited state lifetime due to restricted intramolecular motion in silole aggregates

被引：323

作者：

Ren, Y

Lam, JWY

Dong, YQ

Tang, BZ

Wong, KS ^{[1
]}

机构：

[1] Hong Kong Univ Sci & Technol, Dept Phys, Kowloon, Hong Kong, Peoples R China

[2] Hong Kong Univ Sci & Technol, Dept Chem, Kowloon, Hong Kong, Peoples R China

[3] Shandong Univ, State Key Lab Crystal Mat, Jinan 250100, Peoples R China

来源：

JOURNAL OF PHYSICAL CHEMISTRY B | 2005年 / 109卷 / 03期

关键词：

D O I：

10.1021/jp046659z

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：

The agregation-induced emission (AIE) properties of 1,1,2,3,4,5-hexaphenylsilole(HPS)andpoly{11-[(1,2,3,4,5-pentaphenylsilolyl)oxy]-1-phenyl-1-undecyne} (PS9PA) were studied by time-resolved fluorescence technique. The enhanced fluorescence and long fluorescent lifetime were obtained for the sample in an aggregate state as compared to the sample in solution. The time-decay of fluorescence of RPS and PS9PA in high viscosity solvents and low-temperature glasses has also been measured in detail to further investigate the possible mechanism for AIE. Enhanced light emission and long fluorescence lifetime were detected for both HPS and PS9PA in the solution-thickening, and cooling experiments. These results provided direct evidence. that the enhanced photoluminescence (PL) efficiency is due to restricted intramolecular motion. which ascribes AIE to the deactivation of nonradiative decay caused by restricted torsional motions of the molecules in the solid state or aggregate form.

引用

收藏

页码：1135 / 1140

页数：6

相关论文

共 22 条

[1] Enhanced emission and its switching in fluorescent organic nanoparticles [J].

An, BK ;

Kwon, SK ;

Jung, SD ;

Park, SY .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2002, 124 (48) :14410-14415

[2] Conformational analysis and optical characterization of oligothiophene inclusion compounds [J].

Bongiovanni, G ;

Botta, C ;

Bredas, JL ;

Cornil, J ;

Ferro, DR ;

Mura, A ;

Piaggi, A ;

Tubino, R .

CHEMICAL PHYSICS LETTERS, 1997, 278 (1-3) :146-153

[3] Highly efficient organic light-emitting diodes with a silole-based compound [J].

Chen, HY ;

Lam, WY ;

Luo, JD ;

Ho, YL ;

Tang, BZ ;

Zhu, DB ;

Wong, M ;

Kwok, HS .

APPLIED PHYSICS LETTERS, 2002, 81 (04) :574-576

[4] Hyperbranched poly(phenylenesilolene)s: Synthesis, thermal stability, electronic conjugation, optical power limiting, and cooling-enhanced light emission [J].

Chen, JW ;

Peng, H ;

Law, CCW ;

Dong, YP ;

Lam, JWY ;

Williams, ID ;

Tang, BZ .

MACROMOLECULES, 2003, 36 (12) :4319-4327

[5] Synthesis, light emission, nanoaggregation, and restricted intramolecular rotation of 1,1-substituted 2,3,4,5-tetraphenylsiloles [J].

Chen, JW ;

Law, CCW ;

Lam, JWY ;

Dong, YP ;

Lo, SMF ;

Williams, ID ;

Zhu, DB ;

Tang, BZ .

CHEMISTRY OF MATERIALS, 2003, 15 (07) :1535-1546

[6] Silole-containing polyacetylenes. Synthesis, thermal stability, light emission, nanodimensional aggregation, and restricted intramolecular rotation [J].

Chen, JW ;

Xie, ZL ;

Lam, JWY ;

Law, CCW ;

Tang, BZ .

MACROMOLECULES, 2003, 36 (04) :1108-1117

[7] Electroluminescence in conjugated polymers [J].

Friend, RH ;

Gymer, RW ;

Holmes, AB ;

Burroughes, JH ;

Marks, RN ;

Taliani, C ;

Bradley, DDC ;

Dos Santos, DA ;

Brédas, JL ;

Lögdlund, M ;

Salaneck, WR .

NATURE, 1999, 397 (6715) :121-128

[8] Recent progress of molecular organic electroluminescent materials and devices [J].

Hung, LS ;

Chen, CH .

MATERIALS SCIENCE & ENGINEERING R-REPORTS, 2002, 39 (5-6) :143-222

[9] Enhanced fluorescence of remote functionalized diaminodicyanoquinodimethanes in the solid state and fluorescence switching in a doped polymer by solvent vapors [J].

Jayanty, S ;

Radhakrishnan, TP .

CHEMISTRY-A EUROPEAN JOURNAL, 2004, 10 (03) :791-797

[10] OPTICAL-PROPERTIES OF QUASI-ONE-DIMENSIONAL THIOPHENE-BASED OLIGOMERS [J].

KANEMITSU, Y ;

SUZUKI, K ;

MASUMOTO, Y ;

TOMIUCHI, Y ;

SHIRAISHI, Y ;

KURODA, M .

PHYSICAL REVIEW B, 1994, 50 (04) :2301-2305