Synthesis on Spiropyran/ SrAl₂O₄:Eu²⁺,Dy³⁺ Photochromic Phosphor and its Solvent Effects

Abstract:

6-nitro-1,3',3'-trimethyl-indoline spiropyrans (SP) was synthesized, which is a photochromic compound. SP/SAO-ED composite phosphor was prepared with an organic ligand SP coated on the surface of SrAl₂O₄:Eu²⁺,Dy³⁺ (SAO-ED) phosphor by the interfacial coordination chemistry method. The effect of the solvent on the properties of SP/SAO-ED phosphor was investigated, and the effects of the solvent effect on the UV maximum absorption wavelength and fading kinetics of SP and SP/SAO-ED were also studied. Results showed that SP/SAO-ED composite phosphor has higher photochromic and photoluminescent properties when the prepared parameter is chloroform as solvent. The UV maximum absorption wavelength of open-loop SP and SP/SAO-ED is decreasing with the increasing of the solvent polarity, which is the negative color effect. The fading reaction kinetic equations meets with the first order reaction, and the rate constant is decreasing with the increasing of the solvent polarity.

• Periodical: Advanced Materials Research (Volumes 805-806)
• Pages: 1362-1367
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.805-806.1362
• Online since: September 2013
• Authors: Sheng Fei Yu*, Wu Sheng Luo
• Keywords: Phosphor, Photochromic, Photoluminescence (PL), Solvent Effect, Spiropyrans

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