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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.


Zhou Z.,South China Normal University | Zhang C.C.,University of Texas Southwestern Medical Center | Zheng Y.,South China Normal University | Wang Q.,South China Normal University | Wang Q.,Guangzhou Key Laboratory of Materials for Energy Conversion and Storage
Journal of Medicinal Chemistry | Year: 2016

We report biological evaluation of a novel nanoparticle delivery system based on 1,1,2-triphenyl-2-(p-hydroxyphenyl)-ethene (TPE-OH, compound 1), which has tunable aggregation-induced emission (AIE) characteristics. Compound 1 exhibited no emission in DMSO. In aqueous media, compound 1 aggregated, and luminescence was observed. The novel membrane-cytoplasm-nucleus sequential delivery strategy could induce apoptosis in four different kinds of cancer cells (including three adherent cell lines and one suspension cell line). The nanoparticles remained in the cytoplasm with intense blue emissions, whereas doxorubicin was observed in the nucleus with striking red luminescence. The nanoassembly was internalized in cells through an energy-dependent process. Three sorts of chemical inhibitors were used to clarify the endocytosis mechanism based on the AIE type prodrug. Furthermore, we have developed the first AIE theranostic system where drug targeting and release have been applied in an animal model. © 2015 American Chemical Society.


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.


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.


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.


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.


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

The design, synthesis, photophysical properties and practical application of fluorescent silicon nanoparticles (SiNPs) of a quantum-size (∼3 nm) have been studied. 3-Aminopropyltrimethoxysilane (APTMS) and 3-aminopropyltriethoxysilane (APTES) were employed as sources. The newly developed nanoparticles show excellent water solubility and luminescent features. Herein we report a novel chemical approach for selective tetracycline (TC) recognition and a new type of targetable fluorescent sensor has been prepared. The blue emission, peaking at 440 nm, was dramatically quenched in the presence of TCs. Moreover, we utilized this probe in a milk sample study for the determination of TCs, demonstrating its advantages of simplicity and practicality. This journal is © The Royal Society of Chemistry 2015.


Ma Q.,South China Normal University | Wang Q.,South China Normal University | Wang Q.,Guangzhou Key Laboratory of Materials for Energy Conversion and Storage
Carbohydrate Polymers | Year: 2015

Responsive photo-luminescent soft matters have led to the design of optical sensors and switches. In this research, two new organic-inorganic type hybrid hydrogels have been fabricated by the self-assembly of sodium alginate and lanthanide elements. The incorporation of europium ions (Eu3+) (or terbium ions (Tb3+)) was required for the gelation of the dissolved alginate and thermally stable gels were formed. It has been found that red/green emissions derived from lanthanide ions were clearly identified in pure aqueous media through the metal coordination interactions with assembled alginate. These supramolecular structures could partially prevent the Eu3+ (or Tb3+) from being attacked by high frequency vibrations. More importantly, the lanthanide luminescence could be switched "off-on" in the presence of the anthrax biomarker sodium dipicolinate (NaDPA). The detection limits (for NaDPA) were determined to be 8.3 × 10-8 M and 9.0 × 10-8 M based on Eu(III) and Tb(III) gel, respectively. © 2015 Elsevier Ltd. All rights reserved.


Zheng S.-R.,South China Normal University | Zheng S.-R.,Guangzhou Key Laboratory of Materials for Energy Conversion and Storage | Chen R.-L.,South China Normal University | Liu Z.-M.,South China Normal University | And 5 more authors.
CrystEngComm | Year: 2014

Reactions of Ln(iii) salts with 4′-(2,4-disulfophenyl)-2,2′: 6′2′′-terpyridine (H2DSPT) result in five types of coordination polymers, namely, {[Gd(DSPT)(OH)(H2O) 2]·4H2O}n (type I, 1), {[Ln(DSPT)(ox)0.5]·H2O}n (type II, Ln = Nd (2), Eu (3), Tb (4), Er (5), Yb (6), Lu (7), ox = oxalate), {[Ln(DSPT)(ox)0.5(H2O)]·4H2O} n (type III, Ln = Yb (8), Lu (9)), {[Ln(DSPT)(pBDC) 0.5·(H2O)2]·5H2O} n (type IV, Ln = Yb (10), Lu (11), H2pBDC = 1,4-benzenedicarboxylic acid), and {[Ln(DSPT)(pBDC)0.5·(H 2O)2]·5H2O}n (type V, Ln = Dy (12), Er (13)). Type I is a 1D chain built from binuclear Ln 2(DSPT)2 building blocks and OH- linkers. Type II is a 2D layer with (4,5)-connected topology constructed by binuclear Ln 2(DSPT)2 building blocks and ox- anions. Type III is also a 2D network based on Ln(iii), DSPT2-, and ox -, but with (3,4)-connected topology. The ox- anion is generated in situ from carboxylic acid precursor in type II and type III structures. The formation of Lu(iii) complexes of type II or type III can be tuned by the addition of different carboxylic precursors. Type IV posseses a 2D layered structure based on the [Ln(DSPT)]n chain connected by pBDC2-. Type V exhibits a 3D framework formed by binuclear [Ln 2(SO3)2(COO)2] secondary building blocks and DSPT2- and pBDC2- linkers, resulting in a uninodal 8-connected sqc4 topology. The Nd- and Yb-centered complexes show strong NIR luminescence, whereas the Tb- and Eu-centered complexes exhibit strong luminescence in the visible region at room temperature in both solid state and water emulsions. Their luminescence intensity can be strongly quenched by the addition of diethylchlorophosphonate (DCP), but significantly less influenced by dimethylmethylphosphonate (DMMP), diethylcyanophosphonate (DCNP) and other selected organophosphate, which make this material have a potential application in nerve-agent detection. This journal is © the Partner Organisations 2014.


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 | And 3 more authors.
Analytica Chimica Acta | Year: 2014

A new type of Eu(III) ofloxacin complex as the fluorescent pH indicator has been presented. Compared to pure ligand, the complex offers more distinguished color changes (green-red-blue) derived from both lanthanide line emissions and the secondary ionization steps of ofloxacin. During the concentration dependence experiments, the photoluminescence studies on the complex showed that the excitation of this pH probe can occur at a very long wavelength which extends to visible range (Ex=427. nm). Furthermore, the functional complex was successfully incorporated into soft networks and two novel luminescent hydrogels (rod and film) were fabricated. The soft materials also exhibited specific responses towards the pH variation. Finally, the onion cell-stain experiments were carried out to further confirm the validity of pH dependence and the results support the idea that the material will be suitable for monitoring biological samples in the future. © 2014 Elsevier B.V.

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