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Articles by Qiang Gao
Total Records ( 2 ) for Qiang Gao
  Yong-Qiang Chen , Guo-Cheng Liu , Hong-Yan Lin , Xiu-Li Wang and Qiang Gao
  Two new coordination polymers [Cd(TIP)(1,3-bdc)]n (1) and {[La(TIP)(1,3-bdc)1.5] · 0.2H2O}n (2) (TIP = 2-(2-thienyl)imidazo[4,5-f]1,10-phenanthroline and 1,3-H2bdc = isophthalic acid) were synthesized from hydrothermal reactions and characterized by elemental analyses, IR, and single-crystal X-ray diffraction. Complexes 1 and 2 are ribbon structures with different configurations bridged by 1,3-bdc ligand, further extended into 3-D supramolecular structures by π-π stacking and hydrogen bonding interactions. The most interesting feature of these two complexes is that TIP with the large π-system and additional hydrogen bonding group plays a crucial role in the formation of different weak interactions. Thermal properties and fluorescence of 1 and 2 are also investigated in the solid state.
  Dongdong Zhang , Yage Peng , Honglan Qi , Qiang Gao and Chengxiao Zhang
  A novel multielectrode array modified with multiwall carbon nanotubes (MWCNTs) to simultaneous amperometric determination of dihydroxybenzene isomers was designed. The three oxidation peaks at the multielectrode array fabricated in 0.10 M KCl–0.20 M acetate buffer solution (pH 5.40) containing hydroquinone, catechol and resorcinol appeared at +0.192 V, +0.301 V and +0.683 V, corresponding to the oxidation of hydroquinone, catechol and resorcinol, respectively. A simple electrochemical method for simultaneous determination of dihydroxybenzene isomers was developed by multiple linear regression (MLR) method. Under the optimized conditions, the amperometric currents were linear over ranges from 1.0 x 10–6 M to 1.0 x 10–4 M for hydroquinone, from 1.0 x 10–6 M to 1.0 x 10–4 M for catechol and from 6.0 x 10–6 M to 1.0 x 10–4 M for resorcinol, with the detection limits of 3.0 x 10–7 M, 2.0 x 10–7 M and 6.0 x 10–7 M, respectively. The developed method has been applied to simultaneous determination of dihydroxybenzene isomers in artificial wastewater with a satisfactory recovery from 97% to 101%. This work demonstrates that the MWCNTs-modified multielectrode array incorporating multiple linear regression method is a promising strategy for simultaneous electrochemical determination of isomers of organic compounds.
 
 
 
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