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7636327 
Journal Article 
Suppression of aggregation-induced fluorescence quenching in pyrene derivatives: photophysical properties and crystal structures 
Liang, Z; Li, Y; Yang, J; Ren, Yan; Tao, XuT; , 
2011 
1 
Tetrahedron Letters
ISSN: 0040-4039
EISSN: 1873-3581 
PERGAMON-ELSEVIER SCIENCE LTD 
OXFORD 
52 
12 
1329-1333 
English 
WOS:000288044700023 
Two new pyrene-based fluorophores, namely 1-[4-(2,2-diphenylvinyl)phenyl]pyrene (PVPP) and 1,3,6, 8-tetrakis[4-(2,2-diphenylvinyl)phenyl]pyrene (TPVPP), were synthesized through Suzuki coupling reaction and well characterized. PVPP successfully suppresses the fluorescence quenching of pyrene units in the solid state, displaying aggregation-induced enhanced emission. Despite the same substituent, TPVPP shows a different fluorescent behavior. On the basis of the crystal structures, the distinct optical behavior is discussed and clarified. The intermolecular C-H center dot center dot center dot pi interaction has a dramatic effect on their photophysical properties in the solid state. (C) 2011 Elsevier Ltd. All rights reserved. 
Aggregation-induced enhanced emission; Crystal structure; Fluorescence quenching; Pyrene