Cui Yanhui, Li Fen, Zhang Xin
School of Chemical Engineering and Technology, Collaborative Innovation Center of Chemistry Science and Engineering, Tianjin University, Tianjin, 300072, China.
Chem Commun (Camb). 2021 Apr 4;57(26):3275-3278. doi: 10.1039/d1cc00165e. Epub 2021 Mar 2.
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.
合成了两种由芳族胺供体和丹磺酰受体组成的新型染料，其中分子内供体和受体通过狄尔斯-阿尔德动态共价键相连。这些新型染料通过狄尔斯-阿尔德键的可逆形成和断裂表现出可切换的荧光共振能量转移。单晶X射线衍射表明，狄尔斯-阿尔德键比普通单键更长且更弱。动态共价性质使得两种染料通过马来酰亚胺交换实现相互转化，在此过程中可以构建一种新的更高能量转移效率的体系。
