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Date of Publication:2022-10-10

Journal:高等学校化学学报

Volume:29

Issue:7

Page Number:1352-1355

ISSN No.:0251-0790

Abstract:A novel two-photon fluorescent probe DMNS20 was synthesized and characterized via NMR and MS. It contains an 1-oxa4, 10-dithia-7-aza-cyelododecane receptor and a distyrylbenzene fluorophore. Crystal structure was detected through X-ray diffraction. Consequent analysis results show that both C C double bonds exist as trans configuration, and the dihedral angle between the three benzene ring were 24.6 degrees and 37.5 degrees, respectively. The maxima absorption and emission of DMNS20 in acetonitrile were at 460 nm and 600 nm, respectively. Variations of emission spectra were detected upon the addition of different metal ions. It was found that the addition of Ag+ and Zn2+ to DMNS20 caused a new strong emission peak at 420 nm, the emission peak intensity at 600 nm decreased. Two-photon excitation fluorescence spectrum was obtained by excitation at 780 nm.

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