Luminescent and Thermal Properties of Sm3+ Complex with Salicylate and o-Phenanthroline Incorporated in Silica Matrix
来源期刊：JOURNAL OF RARE EARTHS2006年第4期
论文作者：Xu Cunjin
Key words：sol-gel method; silica gel; samarium complex; rare earths;
Abstract: A ternary Sm(Ⅲ) complex with salicylate (sal-) and o-phenanthroline (phen) was synthesized and incorporated in silica matrix by sol-gel method. The luminescence behavior of the complex in silica gel was studied compared with that of the pure complex by means of emission, excitation spectra and thermogravimetic analysis. The results indicate that the fluorescence intensity ratio of the 4G5/2→6H9/2 transition to the 4G5/2→6H5/2 transition in silica gel doped with Sm(sal)3(phen) is lower than that of the pure Sm(sal)3(phen). The thermal stability of Sm(sal)3(phen) is enhanced greatly by the introduction of the complex into silica matrix. An isolated and chemical inert environment of the complex appears to be responsible for the thermal stability enhancement in silica gel.
Xu Cunjin1
(1.Department of Chemistry, Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education, Hangzhou Teachers College, Hangzhou 310036, China)
Abstract:A ternary Sm(Ⅲ) complex with salicylate (sal-) and o-phenanthroline (phen) was synthesized and incorporated in silica matrix by sol-gel method. The luminescence behavior of the complex in silica gel was studied compared with that of the pure complex by means of emission, excitation spectra and thermogravimetic analysis. The results indicate that the fluorescence intensity ratio of the 4G5/2→6H9/2 transition to the 4G5/2→6H5/2 transition in silica gel doped with Sm(sal)3(phen) is lower than that of the pure Sm(sal)3(phen). The thermal stability of Sm(sal)3(phen) is enhanced greatly by the introduction of the complex into silica matrix. An isolated and chemical inert environment of the complex appears to be responsible for the thermal stability enhancement in silica gel.
Key words:sol-gel method; silica gel; samarium complex; rare earths;
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