Investigating the effects of side chain length on the AIE properties of water-soluble TPE derivatives |
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Authors: | Yifan Dong Weilun Wang Cewen Zhong Jianbing Shi Bin Tong Xiao Feng Junge Zhi Yuping Dong |
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Institution: | 1. School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, China;2. School of Chemistry, Beijing Institute of Technology, Beijing 100081, China |
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Abstract: | The emissive properties of fluorophores in aggregated state are important for the development of bio-sensors or bio-imaging reagents. So three water-soluble TPE derivatives with different lengths of side chains have been synthesized and we investigated the effects of side chains on aggregation-induced emission (AIE) properties in the aggregated states. The results indicate that side chains on the fluorophores play a pivotal role in their emission in aggregated state mediated by heparin or solid state, because the coplanarity of these TPE derivatives was affected by side chains. The rates of radiative decay kf and non-radiative decay knr have been obtained through the quantum yields and lifetime, and a larger kf and smaller knr were present for compound TPE-C4N, suggesting that the aggregated TPE-C4N should posses the most remarkable fluorescent property. |
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Keywords: | Tetraphenylethylene (TPE) Aggregation-induced emission (AIE) Fluorescence enhancement Heparin |
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