期刊
SYNTHETIC METALS
卷 159, 期 7-8, 页码 723-728出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.synthmet.2008.12.026
关键词
Spiropyran; Merocyanine; Photochromism; Welding filter; Welding
Functionalized spirobenzopyranoindolines were synthesized and their photophysical and photochemical properties were investigated from the point of view of their application as a photoactive compound in automatic welding filters. 1',3',3'-trimethyl-6-nitrospyro[2H-1-benzopyran-2,2'-indoline] (6-nitroBIPS) was selected and its photochemical and photophysical properties in solution were investigated by means of emission and absorption measurements as well as time-resolved fluorescence spectroscopy measurements and the dipole moment change of 6-nitroBIPS was estimated. The fluorescence spectra of 6-nitroBIPS showed to be shifted to the red with increasing solvent polarity. Based on these results, a model of an optical welding filter with a photochromic liquid layer have been developed and tested according to EN standards. (C) 2009 Elsevier B.V. All rights reserved.
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