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Synthesis, Crystal Structure and Thermal Stability of a New Binuclear Cu(Ⅱ) Complex with 2-Benzoylbenzoic Acid as the Ligand 被引量:2
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作者 李昶红 李薇 +2 位作者 胡波年 胡汉祥 彭爱成 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 2013年第8期1264-1268,共5页
A new complex Cu2(o-C6H5COC6H5COO)4(C10H8N2)2(H2O)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... A new complex Cu2(o-C6H5COC6H5COO)4(C10H8N2)2(H2O)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 Co, a = 14.0133(14), b = 16.0409(16), c = 30.372(3) A, β = 100.8950(10)°, V = 6704.1(12) A3, Dc = 1.364 g/cm3, Z = 8,μ(MoKa) = 0.704 mml, 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. 展开更多
关键词 copper(II) complex 2-benzoyibenzoic acid crystal structure thermal stability properties
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Effect of Ga_2O_3 on Structure and Properties of Calcium Aluminate Glasses 被引量:1
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作者 王衍行 ZU Chengkui +2 位作者 HE Kun ZHAO Huifeng LIU Yonghua 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2016年第5期961-964,共4页
The effect of Ga_2O_3 on the structure and properties of calcium aluminate glasses fabricated by vacuum melting process was investigated by Raman spectrum, differential scanning calorimeter(DSC), and infrared spectr... The effect of Ga_2O_3 on the structure and properties of calcium aluminate glasses fabricated by vacuum melting process was investigated by Raman spectrum, differential scanning calorimeter(DSC), and infrared spectrum methods. The results show that calcium aluminate glass network only consists of [AlO_4] tetrahedral units. With the gradual addition of Ga_2O_3, the quantity of [GaO_4] tetrahedral units increases. Substitution of Ga_2O_3 for Al_2O_3 results in a decrease in Tg, Tx, and Tp, and an increase in the thermal stable index ΔT. Similarly, the absorption band around 3.0 μm obviously reduces and the transparency in 4.0-6.0 μm rapidly increases with increasing Ga_2O_3 content. However, the chemical stability of calcium aluminate glasses decreases if Ga_2O_3 is introduced due to the increasing of [GaO_4] units in the glass network. 展开更多
关键词 calcium aluminate glass structure thermal property infrared property chemical stability
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Synthesis, crystal structure and thermal analysis of tetraiodo-4,4'-bi-1,2,4-triazole 被引量:2
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作者 Lei Li Yu Chi +5 位作者 Xiao-Yu Zhang Guang-Quan Zhang Yong Zhang Ting-Xing Zhao Ming Huang Hong-Bo Li 《Chinese Chemical Letters》 SCIE CAS CSCD 2013年第9期786-788,共3页
Tetraiodo-4,4'-bi-l,2,4-triazole (1) was synthesized from a reaction of iodine monochloride witb 4,4' bi- 1,2,4-triazole (2), which was prepared by a transamination reaction between 4-amine-1,2,4-triazole and N,... Tetraiodo-4,4'-bi-l,2,4-triazole (1) was synthesized from a reaction of iodine monochloride witb 4,4' bi- 1,2,4-triazole (2), which was prepared by a transamination reaction between 4-amine-1,2,4-triazole and N,N-dimethylformamide azine dihydrochloride (3) obtained via a Vilsmeier reaction. The title compound was extensively characterized by melting point, elemental analysis, 1R, HRMS and single crystal X-ray diffraction. The single crystal X-ray structural analysis reveals that compound 1 exhibits a stable conformation with the two triazole rings being perpendicular to minimize three-dimensional steric hindrance and stacking through aromatic zr. analysis from TGA and DSC indicates that resnectivelv. Jr packing interactions between molecules. The therma compound I decomposes at 275.40 ℃ and 338.35 C 展开更多
关键词 Tetraiodo-4 4'-bi- 1 2 4-triazole Synthesis Crystal structure thermal stability
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Structure, magnetic properties, and thermal stability of Sm(1-x)Tm_xCo_5compounds
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作者 Jian-Hua Zuo Ming Yue +5 位作者 Qing-Mei Lu Dong-Tao Zhang Xue-Xu Gao Jiu-Xing Zhang Zhao-Hui Guo Wei Li 《Rare Metals》 SCIE EI CAS CSCD 2014年第2期176-179,共4页
Structure, magnetic properties, and thermal stability of ternary Sm1-xTmxCo5 compounds were studied via X-ray diffraction(XRD), thermal magnetic analysis(TMA), and magnetic measurements. XRD results show that all ... Structure, magnetic properties, and thermal stability of ternary Sm1-xTmxCo5 compounds were studied via X-ray diffraction(XRD), thermal magnetic analysis(TMA), and magnetic measurements. XRD results show that all the compounds have a main phase of hexagonal CaCu5-type crystal structure with small amount of impurity phases; increasing Tm content is associated with contraction of the hexagonal unit cell in the direction of the c axis and expansion of the a and b parameters. TMA results indicate that the Curie temperature(TC) of Sm1-xTmxCo5 compounds gets higher with the increase in Tm content.Magnetic measurements show that both the magnetic anisotropy field(HA) and the magnetization at an applied field of 7 T(M7 T) decrease with the increase of Tm content. However, the thermal stability of both the HAand M7 Tof all the Tm doped compounds is remarkably improved compared with that of the pure SmCo5 compound, leading to the result that both the M7 Tand HAof Sm0.8Tm0.2Co5 .2are higher than those of SmCo5 compound at 473 K, which indicates the good potential of Tm doped compound in the practical applications at elevated temperature. 展开更多
关键词 Sm1-xTmxCo5 compounds Crystal structure Intrinsic magnetic property thermal stability
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