排序方式: 共有69条查询结果,搜索用时 15 毫秒
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合成和表征了两种新的Schiff碱配合物[ZnL(C104)·4H2O(A)和CdL(C104)·3H20(B)],其中L=2-{2-(Aminomethyl-amino]-methyl}-phenol.A(或B)、FeSO4·7H2O和K3[Fe(ox)3]·3H2O进一步反应,生成了配位聚合物{[ML][Fe^ⅡFe^Ⅲ(ox)3]·H2O}∞,其中M=Zn^2+(C)或Cd^2+(D).红外光谱和Mossbauer谱测定结果表明,C和D具有二维层状结构,其阴离子层由[Fe^ⅡFe^Ⅲ(ox)3]-单元构成. 相似文献
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A novel compound [Cl2Bz(3-MeQl) ](TCNQ) ([Cl2Bz(3-MeQl) ]+ = 1-(3,4-dichlo-robenzyl) 3-methlquinoline cation,TCNQ-= 7,7,8,8-tetracyanoquinodimethanide anion) has been synthesized by the reaction of [Cl2Bz(3-MeQl) ]Br and LiTCNQ,and its structure was determined by single-crystal X-ray diffraction. The crystal belongs to monoclinic,space group P21/c. The structure analysis shows that the anions are stacked into a column with isolated π-dimers,and there is one type of TCNQ entries(TCNQ) ,in agreement with the IR spectra analysis and density functional theory calculations of the compound. The most prominent structural features are the completely segregated stacking columns of the TCNQ- anions and [Cl2Bz(3-MeQl)]+ cations. 相似文献
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合成和表征了两种新的Schiff碱配合物[NiL(ClO4)*3H2O (1)和CuL(ClO4)*4H2O (2),其中L是由摩尔比为1∶1的水杨醛和二乙撑三胺缩合而成的Schiff碱.1(或2)、FeSO4*7H2O和K3[Fe(ox)3]*3H2O进一步反应,生成了双金属层状配位聚合物{[ML][FeⅡFeⅢ(ox)3] *1.5 H2O}∞,其中M2+ = Ni2+ (3)或Cu2+ (4).红外光谱和Mssbauer谱测定结果表明,3和4具有二维层状结构,其阴离子层由[FeⅡFeⅢ(ox)3]-单元构成. 相似文献
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A novel cadmium(Ⅱ) coordination polymer [Cd2(3-pa)4(4,4'-bpy)(H2O)].3.08H2O 1 has been synthesized by pyridine-3-carboxylate (3-pall) and CdO with exo-bidentate rigid dipyridyl ligand 4,4'-bipyridine (4,4'-bpy) by using a hydrothermal method, its structure was determined by single-crystal X-ray diffraction and its luminescent property was also documented. Complex 1 crystallizes in orthorhombic space group Pbcn with a = 21.4074(14), b = 27.1119(18), c = 12.3879(8) A, V = 7189.9(8) A3, Z = 8, C34H32.16Cd2N6O12.08, Mr= 942.85, Dc = 1.742 g/cms, p = 1.255 mm-1 and F(000) = 3766. The structure was solved by direct methods and refined to R = 0.0353 and wR = 0.0891 for 6278 observed reflections (I 〉 2σ(I)). The most prominent structural feature is the mutual interpenetration of two identical 3-D open frameworks via filling the large void space, which gives a 2-fold interpenetrating architecture during the self-assembly process. 相似文献
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应用基体改进剂和L′vov平台技术,石墨炉原子吸收光谱法测定了全血中铅.实验发现,使用含磷酸二氢铵0.6%、硝酸铵0.4%的混合溶液作为基体改进剂,可使血样样品的灰化温度提高到900℃,实际使用灰化温度为750℃;用0.3%TritionX-100稀释血样,可代替消化,经氘灯校正背景,直接测定血样中的铅含量,对六份血样分析结果,相对标准偏差3%~7%,回收率93%~106%,分析方法的灵敏度特征质量为6.0pg/1%. 相似文献
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以Na2WO4•2H2O和CdCl2 为主要原料, 分别在十六烷基三甲基溴化铵(CTAB)和十二烷基苯磺酸钠(SDBS)表面活性剂中, 在180 ℃反应16 h, 水热制备了CdWO4纳米棒和纳米线. 利用X射线粉末衍射(XRD)、透射电子显微镜(TEM)和高分辨透射电子显微镜(HRTEM)等手段对产物进行了表征, 并对其在室温下的发光特性进行了测定. 实验结果表明: 产物均为具有单斜结构的单相CdWO4. 其中CdWO4纳米棒具有单晶属性, 平均粒径约为63 nm, 长度近1 µm; 而CdWO4纳米线具有多晶特性, 平均粒径约为12 nm, 长度达十几微米. 当激发波长为253 nm时均有460 nm强的发射峰, 其中CdWO4单晶纳米棒的发光强度大于CdWO4多晶纳米线. 分别对CdWO4纳米棒和纳米线形成的可能机理进行了初步分析. 相似文献
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