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Published on: March 14, 2019
Controlling fluorescence resonance energy transfer of donor-acceptor dyes by Diels-Alder dynamic covalent bonds
Yanhui Cui1, Fen Li, Xin Zhang
1School of Chemical Engineering and Technology, Collaborative Innovation Center of Chemistry Science and Engineering, Tianjin University, Tianjin, 300072, China. xzhangchem@tju.edu.cn.
Abstract:
Two new dyes consisting of an aromatic amine donor and dansyl acceptor were synthesized, where the intramolecular donor and acceptor are connected by Diels-Alder dynamic covalent bonds. These new dyes display a switchable fluorescence resonance energy transfer through reversible formation and cleavage of Diels-Alder bonds. Single crystal X-ray diffraction revealed that Diels-Alder bonds are longer and weaker than normal single bonds. Dynamic covalent properties enable the mutual conversion of the two dyes by maleimide exchanges, where a new higher energy transfer efficiency system can be constructed.
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