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Ag(Ⅰ)、Pd(Ⅱ)异核金属簇合物的制备和晶体结构研究   总被引:4,自引:2,他引:2  
The complexes of [Ag2Pd2(μ-dppm)2(μ-S2CNC4H8)23-S2CNC4H8)2](SbF6)2·Et2O (1) and [AgPd(S2CN C4H8)(μ-dppm)2](SbF6)·H2O (2)were synthesized and their single crystal structures were determined by X-ray diffraction. The complex 1 is monoclinic system, space group P21/c with a=1.14370(3)nm, b=1.39025(4)nm, c=2.93579(8)nm, β=95.173(1)°, V=4.6490(2)nm3, Z=4, Dc=1.716g·cm-3, μ(Mo Kα)=1682cm-1, F(000)=2384, Mr=2401.98, R=0.0662, wR=0.1302. The complex 2 is monoclinic system, space group Cc with a=2.74136(6)nm, b=1.04317(2)nm, c=2.523990(10)nm, β=95.173(1)°, V=4.6490(2)nm3, Z=4, Dc=1.716g·cm-3, μ(Mo Kα)=1682cm-1, F(000)=2384, Mr=2401.98, R=0.0662, wR=0.1302. CCDC: 1, 213613; 2, 213612.  相似文献   
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1 INTRODUCTION Dithiocarbamate derivatives and their metal complexes are extremely versatile compounds which have been used, for example, in the treatment of alcoholism, sarcoma cell and as possible pro- tection against the lethal effect of X-rays etc[1]. Owing to the striking structure features and diversified applications of the metal complexes with dithiocarbamate[2~6], it is of theoretical and practical significance to study the coordination chemistry much more adequately. The meta…  相似文献   
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采用微乳法制备了n-p型CeO_2/BiOBr异质结,其中十六烷基三甲基溴化铵(CTAB)既作为Br源,又作为"桥"使CTA~+修饰在CeO_2表面形成了稳定的油包水微乳体系.利用XRD、SEM、HRTEM、UV-Vis DRS、BET、XPS等对样品进行结构、形貌和光学性质进行表征,并对复合光催化剂进行了可见光下降解甲基橙(MO)的光催化活性研究.考察了不同煅烧温度对合成CeO_2/BiOBr的影响.结果表明:CeO_2/BiOBr异质结相比于单体CeO_2和BiOBr来说,它的光响应范围大大增加,在可见光下降解MO具有更高的光催化活性.450℃下煅烧可使MO达到最佳的降解率,而高温则会使催化剂发生烧结.机理研究表明,在CeO_2与BiOBr复合体中,使有机物矿化的主要为CeO_2价带上的光生空穴.CeO_2/BiOBr催化活性增强主要是由于在CeO_2与BiOBr之间形成了n-p型的异质结.  相似文献   
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Self-assembly between the building blocks of Pd(Et2dtc)2 (Et2dtc = diethyldithio carbamate) and [Cu2(μ-dppm)2(MeCN)2]2+ (dppm = bis(diphenylphosphino)methane) gave a new heterotetranuclear complex [Cu2Pd2(μ-dppm)2(μ-Et2dtc)2(μ3-Et2dtc)2](ClO4)2.H2O (C70H86Cl2Cu2-N4O9P4Pd2S8, Mr = 1932.56), and its crystal structure has been determined by X-ray crystallography. It crystallizes in triclinic, space group P1- with a = 11.9834(6), b = 12.5624(6), c =14.5603(8) A, α = 101.393 (1), β = 103.300 (1), γ= 96.310(1)°, V = 2063.2(2) A3, Z = 1, Dc =1.544 g/cm3,μ(MoKα) = 1336 cm-1 and F(000) = 978. The total and unique reflections are 8710 and 5400, respectively. The structure was refined to R = 0.0860 and wR = 0.1996 for 3914 observed reflections with I > 2σ(Ⅰ). The title complex consists of the cation [Cu2Pd2(μ-dppm)2(μ-Et2dtc)2(μ3-Et2dtc)2]2+, anion ClO4- and solvate H2O. The Pd(Ⅱ) atoms are located at the approximately square-planar environments with PS3 donors and the Cu(Ⅰ) atoms display distorted tetrahedral geometries.  相似文献   
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采用PS-1型大流量聚氨酯泡沫(PUF)大气采样器,采集了2004年夏季5、6、7三个月广州市区和郊区两个采样点20个大气样品,用气相色谱-质谱联用仪测定了其中16种多环芳烃的含量。结果表明,广州夏季市区和郊区大气中16种多环芳烃(气相和颗粒相)(∑16-PAHs)浓度范围分别为49.33~329.37ng/m3和30.11~97.97ng/m3,市区与郊区∑16-PAHs平均浓度分别为144.25ng/m3和58.79ng/m3,市区明显要高于郊区;市区和郊区苯并[a]芘(BaP)平均浓度分别为1.17ng/m3和0.76ng/m3,均未超过国家空气质量标准。  相似文献   
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