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Tang K.,South China Normal University | Ma Q.,South China Normal University | Zhan Q.,South China Normal University | Wang Q.,South China Normal University | Wang Q.,Guangzhou Key Laboratory of Materials for Energy Conversion and Storage
Optical Materials | Year: 2014

A new kind of europium 2,6-Pyridinedicarboxylic acid complex was synthesized and immobilized in titania via modification of this network. Then a europium luminescent hybrid material was fabricated, which gave prominent red emission. More importantly, this target material exhibited highly selective and rapid quenching effect to copper ion in contrast with Ca2+, Na +, K+, Ni2+, Zn2+, Mn2+, Ag+ and Fe3+ in pure water. The europium containing titania hybrid material could be promising for the fabrication of functional sensing devices. © 2014 Elsevier B.V. All rights reserved. Source


Lin J.,South China Normal University | Zheng Y.,South China Normal University | Wang Q.,South China Normal University | Wang Q.,Guangzhou Key Laboratory of Materials for Energy Conversion and Storage
Dyes and Pigments | Year: 2015

A novel luminescent organic-inorganic hybrid terbium material containing a boronic acid receptor site has been designed and synthesized. Ultra-violet excitation of the material results in green emission from the terbium core. Homogenous spherical nanoparticles with the average diameter of 60 nm were achieved by embedding the terbium complex onto a silica surface. The boron-fluoride interactions of the new material in an aqueous environment provide for a new on-off luminescence sensor for fluoride ions in the field of lanthanide based multifunctional materials. © 2014 Elsevier Ltd. All rights reserved. Source


Zhou Z.,South China Normal University | Wang Q.,South China Normal University | Wang Q.,Guangzhou Key Laboratory of Materials for Energy Conversion and Storage
Nanoscale | Year: 2014

A novel organic-inorganic hybrid sensor based on diethylenetriaminepentaacetic acid (DTPA) modified reduced graphene oxide (RGO-DTPA) chelated with terbium ions allows detection of dopamine (DA) through an emission enhancement effect. Its luminescence, peaking at 545 nm, has been improved by a factor of 25 in the presence of DA (detection limit = 80 nM). In addition, this covalently bonded terbium complex functionalized reduced graphene oxide (RGO-DTPA-Tb) can be successfully assembled on a glassy carbon electrode. The assay performed through differential pulse voltammetry (DPV) yielded obvious peak separation between DA and excessive amounts of the interfering ascorbic acid (AA). © 2014 the Partner Organisations. Source


Lin J.,South China Normal University | Wang Q.,South China Normal University | Wang Q.,Guangzhou Key Laboratory of Materials for Energy Conversion and Storage
Chemical Engineering Journal | Year: 2014

The concept of "slow release anions for the assembly of crystals" was successfully carried out through a facile, effective and environmental friendly supersonic and microwave co-assistance (SMC) approach at very low temperature in less than 40min. It has been found that the rational design of multiple irradiations, lanthanide contraction and fluoride sources would make it possible to control both the crystalline phases (hexagonal or orthorhombic) and the microstructures (including nanoparticles, nanoplates or micro-meter scale particles). The photo-luminescent properties of EuF3 and TbF3 revealed that characteristic red and green emissions can be excited by multiple wavelengths. Moreover, the results demonstrated that there are efficient energy transfers from Gd3+ to Eu3+ and Tb3+ in GdF3: Eu3+ and GdF3: Tb3+ phosphors based on this new method. © 2014 Elsevier B.V. Source


Wang Z.,South China Normal University | Wang Q.,South China Normal University | Wang Q.,Guangzhou Key Laboratory of Materials for Energy Conversion and Storage
Journal of Sol-Gel Science and Technology | Year: 2015

Abstract: A novel benzene sulfonamide-appended silica precursor has been designed and it played dual roles. Firstly, typical green emissions derived from f–f transitions have been achieved through its complexation with terbium ions. Secondly, the hydrolysis–polycondensation process that leads to new organic–inorganic hybrid material has been realized by its reactive trimethoxysilane unit. Different microstructures, controllable synthesis, and their photophysical properties were investigated. Importantly, these novel nanosystems were demonstrated to be capable of monitoring Cu2+ in terms of sharp luminescence changes. Graphical Abstract: A novel benzene sulfonamide-appended silica precursor has been designed, and typical green emissions derived from f–f transitions have been achieved. The hydrolysis–polycondensation process that leads to new organic–inorganic hybrid material has been realized by its reactive trimethoxysilane unit. Importantly, these novel nanosystems were demonstrated to be capable of monitoring Cu2+ in terms of sharp luminescence changes.[Figure not available: see fulltext.] © 2015, Springer Science+Business Media New York. Source

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