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A Waterborne Polyurethane‐Based Dye with Green Fluorescence Excited by Visible Light
Author(s) -
Li Mingjun,
Hu Xianhai,
Xian Yuxi,
Liu Xiang,
Liu Manli,
Li Gen,
Hu Pengwei,
Cheng Congliang,
Liu Jin,
Wang Ping
Publication year - 2021
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.202100640
Subject(s) - hypsochromic shift , polyurethane , fluorescence , photochemistry , absorption (acoustics) , quenching (fluorescence) , excited state , materials science , visible spectrum , analytical chemistry (journal) , chemistry , nuclear chemistry , optics , chromatography , optoelectronics , composite material , physics , nuclear physics
A waterborne aminofluorescein polyurethane‐based dye (AF‐WPU) with green fluorescence excited by visible light was synthesized by anchoring aminofluorescein (AF) to waterborne polyurethane chains. The structural characteristics of AF‐WPU was confirmed by means of 1 H‐NMR, FT‐IR and UV‐vis absorption. Compared with AF, there is a hypsochromic shift, and a new absorption peak generating in the UV‐vis spectra of AF‐WPU. Meanwhile, AF‐WPU emited excellent fluorescence. The fluorescence intensity of AF‐WPU increased five times at the same concentration. It is found that the fluorescence intensities of AF‐WPU decreaseed with increased temperature, and increased first and then decreased with increasing concentration. The fluorescence of AF‐WPU is very stable and insensitive to quenching agents. Moreover, AF‐WPU which excited by visible light is less phototoxic to health, and has a broad prospect in practical applications.