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1.
将CdS纳米粒子复合成TiO2纳米多孔膜上,用染料Ru(bpy)2(NCS)2对此复合半导体纳米膜电极进行每化,测量了不同CdS复合量的ITO/TiO2/CdS/Ru(bpy)2(NCS)2光阳极组成光电池的能量转换效率,实验证明,ITO/TiO2/CdS/Ru(bpy)2(NCS)2作为太阳电池光阳极的能量转换效率与TiO2/CdS复合半导体中CdS的含量有关,当CdS复合时间为5min的电池的短路电流为5.23A/m^2,开路电压为0.716V,能量转换效率为0.77%。  相似文献   

2.
配合物Li(THF)_2(μ-Cl)_2YCl_2(THF)_2,M=526.10,结构已由X射线衍射法测定,空间群C_2/c,a=21.333(5),b=10.371(10),c=22.559(4)(?),β=90.87(1)°,V=4990.4(?)~3,Z=8,μ(Cu K_a)=75.378cm~(-1),F(000)=2160,R=0.073。  相似文献   

3.
The title dimanganese complexes react with NO (5% in N2) at room temperature to give as major products the corresponding hexanitrosyl derivatives [Mn2(NO)6(μ-L2)] in moderate yields, and they react rapidly with NO2 to give the corresponding hydride derivatives [Mn2(μ-H)(μ-NO2)(CO)6(μ-L2)], these having a nitrite ligand bridging the dimetal centre through the N and O atoms. The dppm-bridged dihydride also reacts selectively at 273 K with (PPN)NO2 to give first the nitro derivative (PPN)[Mn2(μ-H)(H)(NO2)(CO)6(μ-dppm)], which then transforms into the nitrosyl complex (PPN)[Mn2(μ-CO)(CO)5(NO)(μ-dppm)] at room temperature or above (dppm = Ph2PCH2PPh2; PPN+ = [N(PPh3)2]+). The latter anion reacts with (NH4)PF6 to give the hydride-bridged nitrosyl complex [Mn2(μ-H)(μ-NO)(CO)6(μ-dppm)] and with [AuCl(PPh3)] to give the trinuclear cluster [AuMn2(μ-NO)(CO)6(μ-dppm)(PPh3)] (Mn-Au = ca. 2.68 Å; Mn-Mn = 2.879(2) Å). Both products are derived from the addition of the added electrophile at the intermetallic bond and rearrangement of the nitrosyl ligand into a bridging position. In contrast, methylation of the anion with CF3SO3Me takes place at the nitrosyl ligand to yield the unstable methoxylimide derivative [Mn2(μ-NOMe)(CO)6(μ-dppm)]. Analogous reactions at the nitrosyl ligand take place upon the addition of HBF4·OEt2 to the nitrosyl-bridged hydrides [Mn2(μ-H)(μ-NO)(CO)n(μ-dppm)m] (n = 6, m = 1; n = 4, m = 2) to give the corresponding hydroxylimide derivatives [Mn2(μ-H)(μ-NOH)(CO)n(μ-dppm)m]BF4, which were also thermally unstable and could not be isolated nor fully characterized.  相似文献   

4.
Crystals of [Ba(H2O)4][Co(Gly)2(NO2)2]2 · 1.43H2O (a=8.1917(6) , b=8.4440(4) , c=19.444(1) , =98.189(9)°, Z=2, space group P2/n) contain infinite strips of alternating axially symmetric [Ba(H2O)4]2+ fragments and two dinitro-bis(glycinato)cobaltate(III) ions. In addition to four oxygen atoms of water molecules, the nearest environment of Ba includes six oxygen atoms of the carboxyl groups of four anions, two of which are also coordinated by the cobalt atoms (Ba-O, 2.77–3.01 ). The nitrite ions do not interact with the Ba2+ ions.__________Translated from Koordinatsionnaya Khimiya, Vol. 31, No. 5, 2005, pp. 329–332.Original Russian Text Copyright © 2005 by Zabel, Poznyak, Pawlowski.  相似文献   

5.
It is found that M(AmH)2(3,5-DNB)4·8H2O compounds (where M(II) = Co, Ni; AmH is piperidine PipH = (C5H10NH2)+ or diethylamine DaH = (C4H10NH2)+ cations; 3,5-DNB = (C7H3N2O6) is the dinitrobenzoic acid anion) are isotypic. The structure of the Ni(PipH)2(3,5-DNB)4·8H2O single crystal is studied. The crystals have a monoclinic system, P21/n space group, Z = 2, a = 6.7694(3) ?, b = 16.0746(6) ?, c = 23.1250(9) ?, β = 97.794(1)°, V = 2493.1(2) ?3, T = 153 K. The final value R(F) = 0.0407 was obtained for 8191 independent reflections with I> 2σ(I). The structural units of the compound studied are as follows: [Ni(OH2)6]2+ complex hexaaquacation, two (PipH)+ cations, four (3,5-DNB) anions, and two molecules of water of crystallization with the structural formula [Ni(OH2)6](PipH)2(3,5-DNB)4·2H2O. Similar compounds of Ni(II) and Co(II) are isostructural.  相似文献   

6.
将 Cd S纳米粒子复合在 Ti O2 纳米多孔膜上 ,用染料 Ru( bpy) 2 ( NCS) 2 对此复合半导体纳米膜电极进行敏化 ,测量了不同 Cd S复合量的 ITO/Ti O2 /Cd S/Ru( bpy) 2 ( NCS) 2 光阳极组成光电池的能量转换效率 .实验证明 ,ITO/Ti O2 /Cd S/Ru( bpy) 2 ( NCS) 2 作为太阳电池光阳极的能量转换效率与 Ti O2 /Cd S复合半导体中 Cd S的含量有关 .当 Cd S复合时间为 5 min的电池的短路电流为 5 .2 3A/m2 ,开路电压为 0 .71 6 V,能量转换效率为 0 .77% .  相似文献   

7.
Reaction of silver(I) halides with PPh3 in acetonitrile and then with pyridine-2-thione (pySH) chloroform (1:1:1 molar ratio) has yielded sulfur bridged dimers of general formula, [Ag2X2(μ-S-pySH)2(PPh3)2] (X = Cl, 1, Br, 2). Both these complexes have been characterized using analytical data, NMR spectroscopy and single crystal X-crystallography. The central Ag2S2 cores form parallelograms with unequal Ag–S bond distances (2.5832(8), 2.7208(11) Å) in 1 and (2.6306(4), 2.6950(7) Å) in 2, respectively. The Ag?Ag contacts of compounds 1 and 2 are 3.8425(8) and 3.8211(4) Å, respectively. The angles around Ag (in the range 87.19(2)–121.71(2)° in 1 and 87.81(2)–121.53(2)° in 2) reveal highly distorted tetrahedral geometry. There are inter dimer π–π stacking interactions between pyridyl rings (inter ring distances of 3.498 and 3.510 Å in complexes 1 and 2, respectively). The solution state 31P NMR spectroscopy has shown the existence of both monomers and dimers. The studies reveal relatively weaker intramolecular –NH?Cl hydrogen bonding in case of AgCl vis-à-vis that in CuCl which favored both a monomer and a dimer with AgCl, and only a monomer with CuCl.  相似文献   

8.
A new dinuclear copper(Ⅱ) polymer [Cu2(bipy)2(Hbtc)2(H2O)2]·(H2O)1/2 1 (bipy=2,2'-bipyridine, H3btc = benzene-1,3,5-tricarboxylic acid) was obtained by the hydrothermal single-crystal X-ray diffraction analysis and identified using elemental analysis and IR spectrum.The title complex crystallizes in monoclinic system, space group P21/c with a = 7.2880(5), b =18.4778(13), c = 13.5465(10)(A), β = 95.9580(10)°, C19H14.50CuN2O7.25, Mr = 450.37, V= 1814.4(2)(A)3, Z=4, Dc = 1.649 g/cm3, μ = 1.253 mm-1, F(000) = 918, Rint = 0.0185, the final R = 0.0271and wR = 0.0710 for 2773 observed reflections (I>2σ(I)). The study results reveal that a pair of distorted square-pyramidal Cu2+ ions are interlinked by bis-monodentate bridging Hbtc2- ligands to constitute a 16-membered ring.  相似文献   

9.
 Oxo peroxo glycolato complexes of vanadium(V) (M 2[V2O2(O2)2(C2H2O3)2nH2O (n=0, 1; M=NBu4 + (1), K+ (2), NH4 + (3), Cs+ (4), NPr4 + (5)) as well as (NBu4)2[V2O4(C2H2O3)2]ċ H2O (6) have been prepared and characterized by spectroscopic methods. X-Ray structure analysis of 1 revealed the presence of dinuclear [V2O2(O2)2(C2H2O3)2]2− anions with a (chemical structure) bridging core and six coordinated vanadium(V) atoms in a distorted pentagonal pyramidal array.  相似文献   

10.
Compound [Ni(hmt)2(SCN)2(H2O)2][Ni(SCN)2(H2O)4](H2O)2 (hmt=hexamethylenetetramine) was pre-pared and structurally characterized by means of X-ray single crystal diffraction. The two neutral units [Ni(hmt)2(SCN)2(H2O)2] and [Ni(SCN)2(H2O)4] are joined together through hydrogen bonds N…H-O, O…H-O and S…H-O. In the solid state, the compound has three-dimensional network structure. The determination of its variable-temperature magnetic susceptibilities (5~300K) shows that the magnetic behavior obeys the Curie-Weiss law over the whole temperature ranges.  相似文献   

11.
(S2W(μ-S)2OW(μ-S)2WS2]2-的合成和性质研究   总被引:1,自引:0,他引:1  
本文提出在酸性水溶液中,合成钨硫原子簇状化合物[(n-Bu)_4N]_2[S_2W(μ-S)_2OW(μ-S)_2WS_2]和的新方法,并进行了化学分析和红外光谱、电子光谱的测定。  相似文献   

12.
13.
本文首次制备了异硫氰酸钇低水合物Y(NCS)3·4 1/2H2O和Y(NCS)3·2 1/2H2O,采用量热法测定了它们在298.15K时的标准生成焓,进而计算了它们的晶格能以及相应的标准脱水焓。  相似文献   

14.
利用温度跃升傅立叶变换红外原位分析技术在0.1MPa氩气的条件下,对斯蒂酚酸碳酰肼铅和斯蒂酚酸碳酰肼镉的快速热分解过程进行了研究。研究结果表明,斯蒂酚酸碳酰肼铅的主要热分解气体为NH3, H2O和 HONO,而斯蒂酚酸碳酰肼镉的主要热分解气体为CO 和 NO,因此斯蒂酚酸碳酰肼镉不满足作为环境友好起爆药的使用要求。这两种化合物在快速热分解过程中均产生金属异氰酸盐、金属碳酸盐和金属氧化物。利用Real程序计算其燃烧温度可得斯蒂酚酸碳酰肼铅的燃烧温度要高于斯蒂酚酸碳酰肼镉,对其燃烧产物进行计算,发现HNCO不在燃烧产物之列,NO的含量也比实验得出的浓度要小。  相似文献   

15.
利用琥珀酸为鳌合剂的湿化学法成功合成了一系列锂离子电池正极材料LiNi1/3Mn1/3Co1/3O2,在合成过程中改变琥珀酸与金属离子摩尔比(R)并研究了这一参数对合成LiNi1/3Mn1/3Co1/3O2材料物理及电化学性质的影响.采用热重、X射线衍射、Rietveld精修、扫描电镜以及超导量子干涉仪对反应机理、材料的结构、形貌以及磁学性质进行了详细表征.得到最佳合成条件为R=1,此时LiNi1/3Mn1/3Co1/3O2的阳离子混排度最低.此外,通过Rietveld精修得到该材料阳离子混排度的结果与通过磁学方法得到的结果定量相符,如对于在R=1条件下合成的样品,Rietveld精修结果显示其阳离子混排度为1.85%,而超导量子干涉仪的测试结果为1.80%.当充放电区间为3.0-4.3V,电流密度为0.2C(1C=160mA·g-1)时,该样品的首次放电容量为161mAh·g-1,库仑效率为93.1%,经过50次循环后,容量保持率可达91.3%.  相似文献   

16.
Reactions of [(dtc)2Mo2(S)2(μ-S)2] with one or two equivalents of CuBr in CH2Cl2 afforded two new heterobimetallic sulfide clusters, [(dtc)2Mo23-S)(μ-S)3(CuBr)] (1) and [(dtc)2Mo23-S)4(CuBr)2] (2). Both compounds were characterized by elemental analysis, IR, UV-vis and X-ray analysis. Compound 1 contains a butterfly-shaped Mo2S4Cu core in which one CuBr unit is coordinated by one bridging S and two terminal S atoms of the [(dtc)2Mo2(S)2(μ-S)2] moiety. In the structure of 2, one [(dtc)2Mo2(S)2(μ-S)2] moiety and two CuBr units are held together by six Cu-μ3-S bonds, forming a cubane-like Mo2S4Cu2 core.  相似文献   

17.
The crystal structures of the four title clathrate compounds Cd(NH3)2Cd(CN)4 · 2C6H6,I, Cd(NH3)2Cd(CN)4 · 2C6H5NH2,II, Cd(NH2CH2CH2NH2)Cd(CN)4 · 2 C6H5NH2,III, and Cd(C6H5NH2)2Cd(CN)4 · 0.5C6H5NH2,IV, have been analyzed by single crystal X-ray diffraction methods. CompoundI crystallizes in the monoclinic space groupC2/c,a = 12.063(2),b = 12.174(2),c = 14.621(1) Å,β = 90.976(9)°,Z = 4,R = 0.042 for 2388 reflections;II: monoclinic C2/c,a = 12.1951(9),b = 12.078(1),c = 14.6921(7) Å,β = 93.436(5)°,Z = 4,R = 0.039 for 2374 reflections;III: monoclinicCc,a = 11.027(1),b = 12.0767(9),c = 15.837(1) Å,β = 92.059(9)°,Z = 4,R = 0.041 for 2883 reflections; andIV: monoclinicP21/n,a = 15.169(2),b = 16.019(2),c = 8.866(1) Å,β = 95.73(1)°,Z = 4,R = 0.052 for 3612 reflections. The three-dimensionalcatena-[diamminecadmium(II) tetra-μ-cyanocadmate(II)] hosts ofI andII are substantially isostructural to that of the already known Hofmann-Td-type Cd(NH3)2Hg(CN)4 · 2C6H6. The three-dimensional en-Td-typecatena-[catena-μ-ethylenediaminecadmium(II) tetra-μ-cyanocadmate(II)] host ofIII, reinforced by the catena-μ-en linking between the octahedral Cd atoms, accommodates the aniline as the guest with a monoclinic distortion from the tetragonal symmetry of the previously reported en-Td-type benzene clathrate. InIV dual behavior of aniline, one as the unidentate ligand in the three-dimensional host and the other as the guest in the cage-like cavity, has been demonstrated.  相似文献   

18.
本文首次报道三元体系Cu(NO3)2-CO(NH2)2-H2O(30℃)和La(NO3)3-CO(NH2)2-H2O(25℃)的等温溶度及饱和溶液、折光率,绘制相应的溶度图及折光率-组成图。体系中发现有组成为Cu(NO3)2·4CO(NH相似文献   

19.
The title compound was synthesized by reaction of Cu(ClO4)2, picolinic acid and carbamide in C2H5OH/CH3CN solution, and characterized by single-crystal X-ray diffraction. It crystallizes in the orthorhombic system, space group Pbca with a=14.0481(8), b=9.0130(5), c=18.626(1)?, V=2358.3(2)?3Z=4, Dx=1.771g·cm-3, μ=1.235mm-1 and F(000)=1276. The final R factor is 0.0440 for 1434 observed reflections. The X-ray analysis revealed that the copper(Ⅱ) atom is coordinated by two picolinic ligands in the equatorial plane, while the two oxygen atoms of perchlorate occupy the axial positions of octahedron with lengthened Cu-O distances, resulting in a 4+2 elongated octahedral environment. In the compound, there also exist two protonated carbamide cations for charge balance. CCDC: 195354.  相似文献   

20.
1INTRODUCTION There is currently considerable interest in the ra-tional design and controlled synthesis of metal-organic frameworks(MOFs)with unique structural motif on account of their promising applications as catalysts,gas storage,selective separation,sensor,ion exchange and magnetic materials[1,2].Particu-larly,the supramolecular architectures with helical structures have received much more attention over the past decades owing to their specific functions in biology.It is well recogn…  相似文献   

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