摘要：
Nano-CeO2/reduced graphene oxide (RGO) composite were successfully prepared using a simple electrochemical technique. The structure and morphology of the composite were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and energy dispersive X-ray spectroscopy (EDS). Numerous of CeO2 nanocrystals are found to be wrapped inside uniformly by gossamer like RGO. The electrochemical behaviors of tryptophan (Trp) on the glassy carbon electrode modified with nano-CeO2/RGO (nano-CeO2/RGO/GCE) were investigated by second derivative linear sweep voltammetry (SDLSV) and cyclic voltammetry (CV). It was found that high electrocatalytic activity was exhibited on the modified electrode for Trp oxidation. The peak current increased about 76-fold and the peak potential shifted 88 mV negatively at the nano-CeO2/RGO/GCE compared with that of the bare GCE, demonstrating the synergistic effect of nano-CeO2 and RGO on the electrode surface. The measurement parameters are optimized. Under the optimum conditions, a good linear relationship was observed between Trp oxidation peak current and its concentration in the range of 0.01-10 mu M, with a sensitivity of 4.7306 mu A mu M-1 and the detection limit was obtained as 6.0 nM (S/N = 3) after accumulating at 0 V for 90 s. The developed method also exhibited good reproducibility, stability and anti-interference ability, and has been successfully applied to Trp detection in commercial compound amino acid injections, human serum and human urine samples with recoveries of 98.5%-106.0%.
作者机构：
[Wei-Wei FU; Jiang-Xi YU] Department of Chemistry and Materials Science, Hengyang Normal University Key Laboratory of Functional Organometallic Materials of College of Hunan Province;[Ya-Qian LI; Zhi-Ping XIE; Xue NIE] Department of Chemistry and Materials Science, Hengyang Normal University
通讯机构：
Department of Chemistry and Materials Science, Hengyang Normal University, Hengyang, China
摘要：
A new 2D Zn(II) metal-organic framework, [Zn2(dib)(1,3-BDC)2(H2O), has been synthesized by the hydrothermal reaction of 1,3-benzenedicarboxylate with ZnSO4·7H2O in the presence of 1,4-di(1-imidazoly)benzene (dib=1,4-di(1-imidazoly)benzene, 1,3-H2BDC=1,3-benzenedicarboxylate). The crystal is of monoclinic system, space group P21/n, with a=0.803 67(12) nm, b=1.332 7(2) nm, c=2.372 5(4) nm, β=97.394(3)°, V=2.519 9(7) nm3, Z=4, F(000)=1 392, R=0.052 0 and wR=0.099 4 (I>2σ(I)). The two central zinc(II) ions in the complex locate in a different coordination geometry, one is a distorted tetrahedral and the other is a distorted square-pyramidal coordination geometry, respectively. The dib ligand acts as a bridging ligand, which links the 1D double-chain into 2D layer structure. The net is linked into three-dimensional supramolecular network by O-H···O hydrogen bonds.
摘要：
Two Ni(II) metal–organic frameworks, [Ni(INAIP)(DMF)]·0.5DMF and [Ni(INAIP)(H2O)]·2H2O, have been synthesized by the reaction of 5-(isonicotinamido)isophthalic acid (H2INAIP) with NiSO4·6H2O using different reaction solvents. Single-crystal X-ray diffraction analysis indicates that [Ni(INAIP)(DMF)]·0.5DMF has a twofold interpenetrated three-dimensional (3D) framework with sra topology, while [Ni(INAIP)(H2O)]·2H2O has a two-dimensional (2D) network structure with a 4-connected (43·63) topology. In addition, the magnetic and adsorption properties of the complexes were explored.
作者机构：
[Nie, Xue; Deng, Yi-Fang; Zhang, Chun-Hua; Chen, Man-Sheng] Key Laboratory of Functional Organometallic Materials, Hengyang Normal University, Department of Chemistry and Materials Science, Hengyang, Hunan 421008, China
通讯机构：
[Zhang, C.-H.] K;Key Laboratory of Functional Organometallic Materials, Hengyang Normal University, Department of Chemistry and Materials Science, China
摘要：
In the title compound, {[NiTb2(C14H8N2O5)4(H2O)4]·4H2O} n , the TbIII ion is coordinated by one water molecule and seven O atoms from four 5-(pyridine-4-carboxamido)isophthalate (L) ligands in a distorted square-antiprismatic arrangement, while the NiII ion, lying on an inversion center, is six-coordinated in an octahedral geometry by two pyridine N atoms, two carboxylate O atoms and two water molecules. One L ligand bridges two TbIII ions and one NiII ion through two carboxylate groups and one pyridine N atom. The other L ligand bridges two TbIII ions and one NiII ion through two carboxylate groups, while the uncoordinating pyridine N atom is hydrogen bonded to an adjacent coordinating water molecule. Extensive O - H...O, N - H...O and O - H...N hydrogen bonds play an important role in stabilizing the crystal structure.
期刊：
Inorganic and Nano-Metal Chemistry,2012年42(4):513-517 ISSN：2470-1556
通讯作者：
Chen, Man-Sheng
作者机构：
[Deng, Yi-Fang; Nie, Xue; Chen, Man-Sheng; Zhang, Chun-Hua] Hengyang Normal Univ, Dept Chem & Mat Sci, Hengyang City 421008, Peoples R China.;[Chen, Man-Sheng] Hengyang Normal Univ, Dept Chem & Mat Sci, 165 Huangbai Rd, Hengyang City 421008, Peoples R China.
通讯机构：
[Chen, Man-Sheng] H;Hengyang Normal Univ, Dept Chem & Mat Sci, 165 Huangbai Rd, Hengyang City 421008, Peoples R China.
摘要：
A 3d-4f heterometallic coordination polymer, [Mn0.5Tb (INAIP)(2)(H2O)(2)]center dot 2H(2)O (1) has been prepared by hydrothermal reactions of the corresponding lanthanide salt with 5-(isonicotinamido)isophthalic acid (H(2)INAIP) in the presence of MnSO4 center dot H2O and NaOH. X-ray single-crystal structural analysis reveals that 1 features non-interpenetrated three-dimensional (3D) coordination framework containing two-dimensional (2D) (4, 4) Tb-carboxylate layers. In addition, 1 also displayed photoluminescent properties in the green range at room temperature.
