Emission-color change caused by photoredox reactions of europium ions in Ba3MgSi2O8

被引：6
|
作者：
Yonezaki, Yoshinori [1 ]
Takei, Shino [1 ]
Matsumoto, Sayaka [1 ]
机构：
[1] Univ Yamanashi, Ctr Crystal Sci & Technol, Grad Fac Interdisciplinary Res, Miyamae 7-32, Kofu, Yamanashi 4008511, Japan
来源：
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY | 2018年 / 367卷
关键词：
Photochromism; Emission; Silicate; Europium; Photoredox reaction; Glaserite; CRYSTAL-STRUCTURE; PHOTOCHROMISM;
D O I：
10.1016/j.jphotochem.2018.09.002
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Ba3-xEuxMgSi2O8 (0 <x <= 0.20) showed Eu3+ -derived orange emission under near-ultraviolet light. After the photostimulation using a Xe-arc lamp, the emission color turned purple because blue-emission centers arose within it. The following heat treatment reverted the emission color back to the original. From the excitation spectrum, the blue emission was assigned to Eu2+ ions those had not been identified before the photostimulation, which indicates that the photoreduction of Eu3+ caused the observed emission-color change. When x = 0.01, the most intense blue emission was induced by the photostimulation. Further addition of Eu ions lead to a decrease in the induced blue-emission intensity.
引用
收藏
页码：406 / 410
页数：5
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