Binary and Ternary Heterometallic (La3+, Gd3+, Y3+)–Eu3+ Functionalized SBA-15 Mesoporous Hybrids: Chemically Bonded Assembly and Photoluminescence

Bing Yan,Li-Li Kong

doi:10.1007/s11671-010-9626-x

Abstract

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.

Highlights

Rare earth hybrid inorganic/organic materials have attracted more attention due to their diverse potential applications in catalysis, gas adsorption, magnetism, optical devices or lasers [1,2,3,4]
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
We discuss the synthesis of a series of heterometallic hybrid mesoporous materials, in which inert rare earth, such as La3?, Gd3?, Y3?, and the active rare earth ion (Eu3?) are introduced through the covalently bonded SBA-15 framework, and the luminescence enhancement can be found through the intramolecular energy transfer within the hybrid mesoporous materials system

Summary

Introduction

Rare earth hybrid inorganic/organic materials have attracted more attention due to their diverse potential applications in catalysis, gas adsorption, magnetism, optical devices or lasers [1,2,3,4]. 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? Keywords Heterometallic hybrid mesoporous materials Á Rare earth ions Á Covalently bonded Á Photoluminescence Á Energy transfer

Results

Conclusion