Binary and Ternary Heterometallic (La3+, Gd3+, Y3+)-Eu3+ Functionalized SBA-15 Mesoporous Hybrids: Chemically Bonded Assembly and Photoluminescence.
Binary and Ternary Heterometallic (La3+, Gd3+, Y3+)-Eu3+ Functionalized SBA-15 Mesoporous Hybrids: Chemically Bonded Assembly and Photoluminescence.
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DOI：
10.1007/s11671-010-9626-x
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发表时间：
2010-05-16
影响因子：
--
通讯作者：
Kong, Li-Li
中科院分区：
文献类型：
--
作者：
Yan, Bing;Kong, Li-Li
关键词：
通过3-氨丙基三甲氧基硅烷（APS）对5-磺基水杨酸（SUA）进行改性，合成了一种新型的有机-无机单体SUASi，并将其与SBA-15和1，以Pluronic P123为模板剂，Eu ~（3+）配合物为催化剂，SUASi和TEOS共缩合合成了10-菲咯啉（phen）。最后，通过溶胶-凝胶法制备了由活性稀土离子（Eu ~（3+））-惰性稀土离子（Y ~（3+），La ~（3+），Gd ~（3+））共价键合到介孔材料网络上的发光杂化介孔材料。所有这些材料的物理特性和光致发光的详细研究。特别是研究了Eu ~（3+）-（Y ~（3+），La ~（3+），Gd ~（3+））不同配比下的发光行为，表明惰性稀土离子的存在可以增强Eu ~（3+）的发光强度。这可能是由于Y3+、La 3+、Gd 3+和Eu 3+之间通过共价键合的介孔骨架进行分子内能量转移。
A novel kind of organic–inorganic monomer SUASi has been achieved by modifying 5-sulfosalicylic acid (SUA) with 3-aminopropyltrimethoxysilane (APS), subsequently binary and ternary Eu3+ mesoporous hybrid materials with 5-sulfosalicylic acid (SUA)-functionalized SBA-15 and 1,10-phenanthroline (phen) are synthesized by co-condensation of SUASi and TEOS in the presence of Eu3+ complex and Pluronic P123 as a template. Finally, luminescent hybrid mesoporous materials consisting of active rare earth ions (Eu3+)—inert rare earth ions (Y3+, La3+, Gd3+) complex covalently bonded to the mesoporous materials network have been obtained via this sol–gel approach. The physical characterization and photoluminescence of all these resulting materials are studied in detail. Especially the luminescent behavior has been studied with the different ratios of Eu3+–(Y3+, La3+, Gd3+), which suggests that the existence of inert rare earth ions can enhance the luminescence intensity of Eu3+. This may be due to the intramolecular energy transfer between Y3+, La3+, Gd3+, and Eu3+ through the covalently bonded mesoporous framework.
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