Xing Yin
2013
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Dyestuffs and coloration
Abstract
Three compounds,called as 1,3,3-Trimethylspiro(indoline-2,3'-naphtho [2,1-b] [1,4] oxazine),and 6'-amino-substituted spiroindolinonaphth [2,1-b] [1,4] oxazines were synthesized which contains naphthalene ring.The structures weve characterized by1H-NMR and IR,and the photochromic properties were studied with UV absorption spectrometers.Results showed a red shift of opening absorption peak with the increase of the polarity of the solutions.Besides,6'-substituted electron-donor groups made the maximum absorption wavelength to blue shift.