4.7 Article

Controlling fluorescence resonance energy transfer of donor-acceptor dyes by Diels-Alder dynamic covalent bonds

Journal

CHEMICAL COMMUNICATIONS
Volume 57, Issue 26, Pages 3275-3278

Publisher

ROYAL SOC CHEMISTRY
DOI: 10.1039/d1cc00165e

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Funding

  1. National Natural Science Foundation of China [21975177, 21674079]

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Two new dyes were synthesized with an aromatic amine donor and dansyl acceptor connected by Diels-Alder dynamic covalent bonds, allowing switchable fluorescence resonance energy transfer. Single crystal X-ray diffraction revealed the longer and weaker nature of Diels-Alder bonds compared to normal single bonds. The dynamic covalent properties enable mutual conversion of the dyes through maleimide exchanges to construct a new system with higher energy transfer efficiency.
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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