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Phenylacetylene Dendrimers Containing a Fluorene Core: Synthesis and Spectroscopic Studies
Author(s) -
Wang Chengyun,
Zhong Hanbin,
Li Shanshan,
Shu Weifu,
Shen Yongjia
Publication year - 2010
Publication title -
chinese journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 41
eISSN - 1614-7065
pISSN - 1001-604X
DOI - 10.1002/cjoc.201090134
Subject(s) - phenylacetylene , chemistry , dendrimer , fluorene , fluorescence , quantum yield , photochemistry , band gap , homo/lumo , proton nmr , absorption (acoustics) , absorption band , carbon 13 nmr , polymer chemistry , organic chemistry , molecule , polymer , optics , optoelectronics , physics , catalysis
Phenylacetylene dendrimers 9 – 11 containing fluorene as the core with a larger HOMO‐LUMO energy gap were synthesized and characterized. Their structure and properties were studied by UV, FL, 1 H NMR, MS etc . These novel phenylacetylene dendrimers exhibit unique photophysical properties. They exist a new absorption band around 340 nm whose molar coefficient decreases with increasing generation. The band‐gaps of 9 – 11 are 3.54, 3.43 and 3.02 respectively. The fluorescence quantum yield of 10 is as high as 0.61.