New kinds of hybrid materials containing covalently bonded Tb3+ (Eu3+) complexes organically modified titania and alumina network via sol–gel process
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This work focuses on the construction of a series of novel chemically bonded inorganic–organic rare earth hybrid materials using 3,4-bis(pyridin-4-ylmethoxy)benzoic acid as an organic bridge molecule that can both coordinate with rare earth ions and form an inorganic network with titanium isopropylate and aluminum isopropylate after cohydrolysis and copolycondensation through a sol–gel process. Measurements of the properties of these materials show that the terbium systems present high thermal stability and amorphous structure features. UV excitation in the organic component resulted in strong green emission from Tb3+ ions due to an efficient ligand-to-metal energy-transfer mechanism.
KeywordsLanthanide ions Organic/inorganic hybrids Organically modified alumina/titania Chemical bonding assembly Photoluminescence Sol–gel process
This present work was financially supported by the National Natural Science Foundation of China (Grant Nos. 51272085 and 21171066) and the key technology and equipment of efficient utilization of oil shale resources (No. OSR-05).