摘要：
A new cobalt complex Co(C10H8N2)(H 2O)3[C9H11O2(COO)] with methy-5-norbornene-2,3-dicarboxylic anhydride acid (MNA) and 2,2'-bipyridine as ligands has been synthesized in the mixed solvents of ethanol and water. It crystallizes in monoclinic, space group P21/c with a = 13.0430(13), b = 21.014(2), c = 7.5151(7) Å, β = 102.319(2)°, V = 2012.4(3) Å3, Dc = 1.529 g/cm3, Z = 4, F(000) = 964, GOOF = 1.051, the final R = 0.0457 and wR = 0.0974. The crystal structure shows that the cobalt ion is coordinated with four oxygen atoms from one MNA molecule and three water molecules together with two nitrogen atoms from the 2,2'-bipyridine molecule, forming a distorted octahedral coordination geometry. The thermal stability and electrochemical properties have studied in this paper.
作者机构：
[李薇; 张春华; 匡云飞; 许金生; 陈满生; 易正戟] Department of Chemistry and Materials Science, Key Laboratory of Functional Organometallic Materials of Hengyang Normal University, Hengyang, Hunan 421008, China
通讯机构：
[Xu, J.-S.] D;Department of Chemistry and Materials Science, Key Laboratory of Functional Organometallic Materials of Hengyang Normal University, Hengyang, Hunan, China
作者：
Li Wei;Li Chang-Hong;Yang Ying-Qun;Li Heng-Feng*
期刊：
Chinese Journal of Structural Chemistry,2014年33(11):1593-1596 ISSN：0254-5861
通讯作者：
Li Heng-Feng
作者机构：
[Li Heng-Feng; Li Wei] Cent S Univ, Sch Mat Sci & Engn, Changsha 410083, Hunan, Peoples R China.;[Yang Ying-Qun; Li Wei] Hengyang Normal Univ, Dept Chem & Mat Sci, Hengyang 421008, Peoples R China.;[Li Chang-Hong] Hunan Inst Technol, Sch Mat Sci & Engn, Hengyang 421002, Peoples R China.
通讯机构：
[Li Heng-Feng] C;Cent S Univ, Sch Mat Sci & Engn, Changsha 410083, Hunan, Peoples R China.
关键词：
silver(l) complex;crystal structure;electrochemical;fluorescent and magnetic properties
摘要：
A novel silver(I) complex [Ag(2,2'-bipy)(C14H9O3)]center dot(C14H10O3) has been synthesized with 2-benzoylbenzoic acid as the ligand. Crystal data for the title complex: monoclinic, space group Cc, a = 27.4089(13), b = 10.2897(5), c = 12.0024(6) angstrom, beta = 111.864(4), M-r = 715.49, V = 3141.5(3) angstrom(3), D-c = 1.513 g/cm(3), Z = 4, mu(MoK alpha) = 0.694 min(-1), F(000) 1456, the final R= 0.0473 and wR = 0.1146. In the title complex, the central Ag(I) ion is located in a triangular coordination environment. The electron transfer is quasi-reversible in the electrode reaction and it shows a strong emission peak in the range of 495 similar to 520 nm under 502 nm excitation. In addition, it displays diamagnetic property from 3 to 300 K.
作者：
Li Wei;Li Chang-Hong;Li Heng-Feng*;Tan Xiong-Wen
期刊：
Chinese Journal of Structural Chemistry,2014年33(10):1527-1532 ISSN：0254-5861
通讯作者：
Li Heng-Feng
作者机构：
[Li Heng-Feng; Tan Xiong-Wen; Li Wei] Cent S Univ, Sch Mat Sci & Engn, Changsha 410083, Peoples R China.;[Tan Xiong-Wen; Li Wei] Hengyang Normal Univ, Dept Chem & Mat Sci, Hengyang 421008, Peoples R China.;[Li Chang-Hong] Hunan Inst Technol, Dept Chem Engn, Hengyang 421002, Peoples R China.
通讯机构：
[Li Heng-Feng] C;Cent S Univ, Sch Mat Sci & Engn, Changsha 410083, Peoples R China.
摘要：
A new copper complex 2{Cu(C10H8N2)[C8H11O2(COO)](H2O)(3)}center dot(H2O)(5) with bicycle[2.2.1]hept-2-en-5,6-dicarboxylic acid (H2L) [C7H8(COOH)(2)], basic copper carbonate and 2,2'-bipyridine has been synthesized in the mixed solvents of methanol and water. It crystallizes in the triclinic system, space group P (1) over bar, with a = 7.4626(5), b = 11.9779(8), c = 12.9841(8) angstrom, alpha = 109.7040(10), beta = 98.7550(10), gamma = 90.6240(10)degrees, V = 1077.50(12) angstrom(3), D-c = 1.538 g/cm(3), Z = 1, F(000) = 520, GOOF = 1.065, R = 0.0360 and wR = 0.0950. The copper ion is coordinated with four oxygen atoms from one H2L molecule and three water molecules together with two nitrogen atoms from the 2,2'-bipyridine molecule, forming a distorted octahedral cocirdination geometry. The thermal stability and electrochemical properties were also studied.
摘要：
Activated palm kernel shell carbon (APKSC) was used to remove U(VI) from aqueous solutions in a batch system. The adsorption kinetics, isotherms, and effects of various parameters, such as temperature, contact time, solution pH, adsorbent dosage, and initial U(VI) concentration on the U(VI) adsorption process were studied. Equilibrium was reached after 120 min in the range of studied U(VI) concentrations and temperatures. U(VI) uptake was insignificantly affected by temperature, but was highly pH dependent, and the optimum pH for removal was 5.5. U(VI) removal efficiency increased with the increasing adsorbent dosage. U(VI) sorption capacity increased with increasing initial U(VI) concentration; any further increases in initial U(VI) concentration above a certain point caused insignificant changes in U(VI) sorption capacity. Isotherm data could be described by the Langmuir isotherm model with a maximum U(VI) adsorption capacity of 51.81 mg/g. Kinetic data were fitted to pseudo-first-order and pseudo-second-order equations, which suggested that the U(VI) adsorption onto APKSC was better reproduced by the pseudo-second-order model rather than pseudo-first-order model. Our results indicated that APKSC might be used as a cheap adsorbent in the treatment of uranium-containing wastewater.
关键词：
zinc(II) complex;synthesis;fluorescent and thermal stability properties
摘要：
A new complex has been synthesized with o-methylbenzoyl-benzoic acid (HL) and 1,10-phenanthroline (phen) in the mixture of water and ethanol. It crystallizes in monoclinic, space group C2/c with a = 13.6328(18), b = 17.7876(18), c = 19.998(2) A, β = 104.720(4)°，C_(54)H_(48)N_4O_(11)Zn, Mr = 994.33, V= 4690.2(9) A~3, D_c = 1.408 g/cm~3, Z = 4, F(000) = 2072, μ(MoKa) = 0.59 mm~(-1), R = 0.0736 and wR = 0.2029. The crystal structure shows that the zinc ions are coordinated with two oxygen atoms from two HL molecules and four nitrogen atoms from two phen molecules, forming distorted octahedral coordination geometry. The fluorescent and thermal stability properties of the complex are studied. The result shows that it has one fluorescent emission band at around 412 nm. In addition, the complex is stable under 210 °C.
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.
作者：
Li Chang-Hong*;Li Wei;Hu Bo-Nian;Hu Han-Xiang;Peng Ai-Cheng
期刊：
Chinese Journal of Structural Chemistry,2013年32(8):1264-1268 ISSN：0254-5861
通讯作者：
Li Chang-Hong
作者机构：
[Hu Han-Xiang; Li Chang-Hong; Hu Bo-Nian] Hunan Inst Technol, Dept Chem Engn, Hengyang 421002, Peoples R China.;[Li Wei] Hengyang Normal Univ, Dept Chem & Mat Sci, Hengyang 421008, Peoples R China.;[Peng Ai-Cheng] Hengyang Yele New Mat Co Ltd, Hengyang 421421, Peoples R China.
摘要：
A new complex Cu_2(o-C_6H_5COC_6H_5COO)_4(C_(10)H_8N_2)_2(H_2O)_2 with 2-benzoylben- zoic acid and 2,2' -bipyridine as ligands has been synthesized in mixed methanol and water solvent. Crystal data are as follows: monoclinic, space group Cc, α = 14.0133(14), b = 16.0409(16), c = 30.372(3) A, β = 100.8950(10)o, V = 6704.1(12) A~3, D_c = 1.364 g/cm~3, Z = 8, μ(MoKα) = 0.704 mm~(-1), F(000) = 2840, the final R = 0.0552 and wR = 0.1431. In the crystal structure, the whole molecule consists of two copper ions, four 2-benzoylbenzoic acid molecules, two 2,2'-bipyridine molecules and two water molecules. Each central copper ion is coordinated with two nitrogen atoms from one 2,2'-bipyridine molecule and three oxygen atoms from two 2-benzoylbenzoic acids and one water molecule, respectively, giving a distorted tetragonal pyramidal geometry. Thermal stability properties of the complex were investigated.
关键词：
Direct reduced iron (DRI);Uranium;Kinetics;pH;Mechanism
摘要：
Direct reduced iron (DRI), also called sponge iron, was used for the removal of U(VI) from aqueous solution. Batch experiments were conducted to evaluate the effect of various factors including contact time, solution pH, DRI dosage and initial uranium concentration on this removal process. The result suggested that U(VI) can be rapidly removed by DRI and this removal process followed an apparent first-order reaction kinetics. The optimum pH for uranium removal was between 2.0 and 4.0. Whether U(VI) can be fully removed was influenced by the molar ratio of DRI to U(VI) in solution. The aqueous U(VI) can be removed completely when this ratio was more than ca. 1,000. The U(VI) removal capacities of DRI decreased with increasing DRI dosages at a constant concentration of U(VI), but increased almost linearly with increasing initial U(VI) concentrations at a fixed dosage of DRI. The maximum U(VI) removal capacity was 5.71 mg/g DRI. Finally, the possible mechanism of U(VI) removal by DRI was also discussed. The XPS and XRD analysis showed that U(VI) was deposited as UO3 onto DRI surface, indicating that U(VI) can be removed without reduction.
