材料期刊网

(Z)-2-(1H-咪唑-1-基)-1-(2,3,4-三甲氧基)苯乙酮肟酯的设计与合成

杨松 , 宋宝安 , 李正名 , 廖仁安 , 刘刚

应用化学 doi:10.3969/j.issn.1000-0518.2002.03.013

合成了8个(Z)-2-(1H-咪唑-1-基)-1-(2,3,4-三甲氧基)苯乙酮肟脂(Ⅳ)新化合物,收率在62.1%～84.1%之间. 经元素分析、红外光谱、核磁共振氢谱表征了它们的结构,并讨论了化合物构型与光谱特征之间的关系.

关键词: 三甲氧基苯乙酮肟 , 酯 , 咪唑 , 合成 , 立体异构体

Huazhong University of Science and Technology(H.U.S.T)

材料科学技术（英文）

关键词:

1Cr18Ni9Ti在S—Cl—H_2O环境中的腐蚀行为分析

张建苏 , 袁昌言

腐蚀学报（英文）

1Cr18Ni9Ti在S—Cl—H_2O环境中的腐蚀行为分析张建苏,袁昌言(北京航空材料研究所第五研究室,北京100085)本文以某厂汽提塔再沸器(以下简称E1105)1Cr18Ni9Ti换热管腐蚀故障为例,对其腐蚀现象进行分析.1.E1105换热管腐蚀概况及分析结果换热管内通水蒸汽,管外通石脑油,材料为1Cr18Ni9Ti,其工艺参数为:蒸汽温度246℃,蒸汽压力3.8MPa,气相石脑油温度151℃,气相石脑油压力0.64MPa.人口的石脑油含S量为1.58ppm,含Cl量为3.95ppm,含H。O..

关键词:

环戊烷基茚基氯化钇(1-C5H9C9H6)2-Y(μ-Cl)2Li(THF)2的合成及其晶体结构

齐民华 , 沈琪 , 陈小平 , 翁林红

应用化学 doi:10.3969/j.issn.1000-0518.2003.07.004

无水YCl3与1-环戊烷基茚基锂以1/2的摩尔比在THF中反应合成了二(1-环戊烷基茚基)氯化钇(C5H9C9H6)2Y(μ-Cl)2Li(THF)2,产物用元素分析、红外光谱及XRD进行表征. 结果表明,其晶体属于正交晶系,Pna2(1)空间群,a =1.648 2(7) nm,b =1.877 2(8) nm,c =1.131 7(5) nm,V =3.501(3) nm3,Z=4,Dc=1.285 Mg/m3,最终的偏离因子R=0.068 3,Rw=0.114 3.

关键词: 环戊烷基茚基 , 稀土配合物 , 合成 , 晶体结构

以1,4-DAB为溶剂(1,4-DABH2)2Sn2S6·(1,4-DAB)和(1,4-DABH2)Sb4S7的合成与表征

韩文静 , 阿古拉 , 赵丽佳 , 白音孟和

人工晶体学报

以1,4-丁二胺为溶剂合成两种硫属化合物(1,4-DABH2)2Sn2S6·(1,4-DAB)(1)和(1,4-DABH2) Sb4S7(2)(1,4-DAB =1,4-丁二胺),单晶X-射线衍射分析表明化合物1为单斜晶系,空间群为P21/c,a=1.0862(5) nm,b=1.3053(6) nm,c=1.0283(5) nm,β=101.20(2)°,V=1.4302(12) nm3,Z=2;化合物2为三斜晶系,空间群为P-1,a=0.6009(4) nm,b =0.8989(7) nm,c=1.6548(12) nm,α =89.774(12)°,β=86.481 (12)°,γ=84.495(12)°,V=0.8880(11)nm3,Z=2.化合物1由离散的[Sn2S6]2+、质子化的有机胺和未质子化有机胺组成.化合物2是由质子化的有机胺和双链的[Sb4S7]2-离子组成的二维层状化合物.紫外-可见漫反射光谱研究结果表明,化合物1和2的禁带宽度分别为1.80 eV和1.54 eV,均为半导体.

关键词: 溶剂热合成 , 锡/锑硫属化合物 , 晶体结构 , 表征

配合物[Sm(C7H5O3)2(C4H6NO2S)]·2H2O的热化学研究

杨德俊 , 李旭 , 李强国 , 肖圣雄 , 张应军 , 黄熠

中国稀土学报

将六水氯化钐,水杨酸与硫代脯氨酸3种物质一起反应,制得了一种新的稀土三元固体配合物[Sm(C7H5O3)2(C4H6NO2S)]·2H2O(s).通过红外光谱、热重差热分析、元素分析等手段确定了其结构与组成.在常压、298.15 K下,分别测定了六水氯化钐、水杨酸、硫代脯氨酸和该配合物在混合溶剂(二甲亚砜:乙醇:3 mol·L-1HCI=1:1:1)中的溶解焓,并根据热化学原理得出了298.15 K时配合物[Sm(C7H5O3)2(C4H6NO2S)]·2H2O(s)的标准摩尔生成焓△fHθm=(-2913.73±3.10)kJ·moL-1.

关键词: 稀土配合物 , 六水氯化钐 , 硫代脯氨酸 , 水杨酸 , 热化学

The sulphidation of copper-rich Cu-Ag alloys in H-2-H2S at 550-750 degrees C

Corrosion Science

The sulphidation of two copper-silver alloys containing 5 and 10 wt.% silver (Cu-5Ag and Cu-10Ag, respectively) was investigated over the temperature range 550-750 degrees C in H-2/H2S mixtures under sulphur pressures below the dissociation of Ag2S. External scales, composed mainly of cuprous sulphide, often containing some (Cu,Ag)(2-x)S islands, formed on both alloys. The corrosion kinetics were significantly affected by the detachment of the outer scales at temperature, as a consequence of the significant volume increase due to sulphidation. After scale detachment, sulphidation proceeded through a dissociative transport of sulphur in voids between the outer sulphide layer and the alloy substrate, yielding an abrupt decrease of the corrosion rate in all cases and modifying the composition of the reaction products in the case of Cu-10Ag. An increase of the volume fraction of the silver-rich solid solution in the subscale region with respect to the original alloy was observed in all cases. The silver islands coalesced to a continuous subscale layer only in the sulphidation of Cu-5Ag at 650 and 750 degrees whereas, in all the other cases, they remained as particles in a Cu2S matrix. The peculiar corrosion behaviour of these alloys is attributed to the low solubility of silver in copper. (C) 1999 Elsevier Science Ltd. All rights reserved.

关键词: sulphidation;copper;silver;two-phase alloys;state corrosion kinetics;2-phase binary-alloys;most-stable oxide;internal oxidation

H2S水溶液中的腐蚀与缓蚀作用机理的研究1.酸性H2S溶液中碳钢的腐蚀行为及硫化物膜的生长

杨怀玉 , 陈家坚 , 曹楚南

中国腐蚀与防护学报

利用交流阻抗（EIS）和极化曲线，结合扫描电镜（SEM）和能谱分析， 对常温下低碳钢在含H2S的模拟炼厂常减压塔顶冷凝水中的腐蚀电化学行为和不同浸泡时间下硫化物膜的生长过程进行了研究。结果表明，H2S对腐蚀反应的阴极过程有很大的促进作用，搅拌条件下尤甚；随介质pH值升高，其腐蚀性减弱。腐蚀浸泡初期（小于8h），电极表面硫化物膜的生长遵循抛物线机制，随浸泡时间的延长，硫化物膜变得疏松、易于破裂和脱落，并出现二次生长、修复过程，最终达到膜生长和溶解的平衡。实验条件下电极表面所生成的硫化物膜，不足以对碳钢起到保护作用。

关键词: 交流阻抗 , potentiodynamic polarization , H2S corrosion , sulfide film

配合物[Zn(CH3COO)2(C7H6N2S)2]的合成、晶体结构及表征

马卫兴 , 钱保华 , 程青芳 , 王建 , 许兴友 , 陆路德 , 杨绪杰 , 汪信 , 宋海斌

人工晶体学报 doi:10.3969/j.issn.1000-985X.2006.05.031

用乙酸锌和2-氨基苯并噻唑为原料在甲醇介质中反应制得了配合物[Zn(CH3COO)2(C7H6N2S)2],用元素分析、红外光谱、核磁共振氢谱和热重分析对其进行了表征,用X射线单晶衍射仪测定了其晶体结构,其晶体属于正交晶系,空间群为Pna2(1),晶胞参数分别为a=0.8547(3)nm,b=2.7586(8)nm,c=0.9066(3)nm,α=β=γ=90°,V=2.1376(11)nm3;Dc=1.503g/cm3;Z=4;F(000)=992;μ=1.375mm-1.

关键词: Zn(Ⅱ)配合物 , 谱学表征 , 晶体结构

First-principles study on the electronic structure and magnetic properties of metallic antiferromagnet C7H3S2N2

Journal of Magnetism and Magnetic Materials

First-principles full potential linearized augmented plane wave (FPLAPW) calculations have been performed to study the electronic structure and the magnetic properties of 3-Cyanobenzo-1,3,2-dithiazolyl,C7H3S2N2. The density of states (DOS), the total energy of the cell, and the spontaneous magnetic moment of C7H3S2N2 were all calculated. The calculations reveal that the low-temperature phase of the compound C7H3S2N2 has a stable metal-antiferromagnetic ground state, and there exists an antiferromagnetically coupled interactions between the dithiazolyl radical(1), which is in good agreement with experiment. (C) 2006 Elsevier B.V. All rights reserved.

关键词: first-principles;antiferromagnetic states;hybridization;organic;magnets;charge-transfer salts;temperature