Phenylacetylene Dendrimers Containing a Fluorene Core: Synthesis and Spectroscopic Studies |
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| Authors: | Wang Chengyun Zhong Hanbin Li Shanshan Shu Weifu Shen Yongjia |
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| Institution: | 1. Tel.: 0086‐021‐64252967;2. Fax: 0086‐021‐64252967;3. Key Laboratory for Advanced Materials and Institute of Fine Chemicals, East China University of Science and Technology, Shanghai 200237, China |
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| Abstract: | 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, 1H 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. |
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| Keywords: | dendrimers fluorescence fluorene band‐gap quantum yield |
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