CdS/有机复合纳米材料的可控合成与表征

本文在室温下,以正丁胺为模板剂,二硫化碳为硫源,制得了CdS/有机复合纳米材料.采用XRD、FTIR、SEM、TEM、元素分析以及热重分析(TG)等测试手段对产物进行了表征.实验结果表明产物的结构是CdS(CH3CH2CH2CH2NHCSNHCH2CH2CH2CH3) (CS2).随着正丁胺与二硫化碳的摩尔比、陈化时间...     

2-羟基萘甲醛苯腙衍生物对氟阴离子的高选择性裸眼识别

合成了3种2-羟基萘甲醛苯腙衍生物[1～3;取代基R:H(1),p-NO2(2),2,4-d-NO2(3)],应用紫外-可见吸收光谱研究了其与阴离子的相互作用,通过改变N1-苯环取代基考察了受体分子对阴离子亲合力和选择性的影响.结果表明,乙腈中F-及CH3COO-等阴离子使受体分子吸收光谱发生显著变化,溶液的颜色由黄色...     

Synthesis and Crystal Structure of a Novel Hetero-bimetallic Complex with a Three-dimensional Network Structure: Bis(malonato)tetra(aqua)calcum(II)cobalt(II)

1INTRODUCTION There has been considerable interest in the designand synthesis of transition metal complexes withcarboxylate ligands in coordination chemistry due tothe fact that this type of complexes has potentialapplications in molecule-based magnets,catalysis,supramolecular chemistry and biological systems[1～3].As an important flexibility dicarboxylate ligand,malonate dianion may act as momodentate,chelatedbidentate and tridentate bridging ligands to formvarious1D,2D and3D structures[…     

N-(2,4-二硝基苯基)-N -取代苯腙衍生物对阴离子识别研究

合成了4种N-(2,4-二硝基苯基)-N -取代苯腙类阴离子结合受体(1～4, 取代基 R＝H, o-OCH₃, o-Cl, o-OH), 应用紫外吸收光谱方法研究了其与阴离子的相互作用, 以及考察N -苯环取代基对受体分子之阴离子亲合力和选择性的影响. 实验显示: 乙腈中F^－、CH₃CO 等阴离子使受体分子吸收光谱红移, 溶液由黄色转变为红色, 其中受体分子2对 F^－表现出高选择性的灵敏响应. 实验表明受体-阴离子间形成了氢键型超分子配合物, Job作图法给出了受体分子与阴离子的1∶1结合计量比, ¹H NMR滴定为受体分子与阴离子间的氢键作用本质提供了直接证据.     

杂-双核配合物[CaCu(C3H2O4)2(H2O)4]n的合成、晶体结构及热稳定性

The title complex， [CaCu(C₃H₂O₄)₂(H₂O)₄]_n， with a formula of C₆H₁₂CaCuO₁₂ and M_r=379.78 has been sy-nthesized and characterized by single crystal X-ray diffraction structure analysis， elemental analysis， IR spectra and TG-DTG techniques. The results show that the crystal is Orthorhombic， space group Pbcn with a=0.669 21(5) nm， b=1.370 23(5) nm， c=1.322 39(10) nm， V=1.212 59(16) nm³， D_c=2.080 g·cm^-3， μ=2.288 mm^-1， F(000)=772 and Z=4. The final R=0.054 0 and wR=0.112 8 for 1 189 observed reflections with I>2σ(I). The structure of the title complex consists of CaO₈ polyhedra and CuO₆ elongated octahedra linked together by malonate ligands. The Ca(Ⅱ) cation， on a twofold axis， is coordinated by two water molecules and six malonate O atoms. The Cu(Ⅱ) cation， which lies in a centre of symmetry in an octahedral arrangement， is coordinated by four malonate O atoms and two water molecules. The structure comprises alternating layers along the [101] plane， with the shortest Cu…Cu distance of 0.762 46(6) nm. The whole 3D structure is maintained and stabilized by the presence of hydrogen bonds. Its thermo gravimetric analysis was determined by TG-DTG techniques. CCDC: 663184.     

Synthesis, Crystal Structure and Thermal Stability of a Saturated Dimeric Ce(III)-chelated Complex Based on Benzoate and 1,10-Phenanthroline Ligands

The title complex, [Ce(BA)3phen]2 (BA = benzoate, phen = 1,10-phenanthroline), was prepared by the reaction of Ce(NO3)3·6H2O, benzoic acid and 1,10-phenanthroline. The complex was characterized by single-crystal X-ray diffraction, elemental analysis, IR spectra and TG-DTG techniques. The results show that the crystal is of triclinic, space group P1 with a = 10.912(2), b = 11.962(3), c = 12.474(3) , α = 104.889(3), β = 93.523(3), γ = 113.332(3)o, C66H46Ce2N4O12, Mr = 1366.90, V = 1420.2(6) 3, Z = 1, Dc = 1.598 g/cm3, μ = 1.652 mm-1, S = 1.024 and F(000) = 682. The final R = 0.0391 and wR = 0.0947 for 4878 observed reflections with I > 2σ(I). The structure of the title complex consists of two Ce(C6H5COO)3(C12H8N2) units, forming a binuclear molecule. Each Ce(III) is coordinated by two O atoms of one bidentate chelating carboxylate group, five O atoms of two bidentate bridging and two tridentate chelating-bridging carboxylate groups, and two N atoms of one 1,10-phenanthroline molecule to complete a distorted monocapped square antiprism geometry. Its thermogravimetric analysis was determined by TG-DTG techniques.     

杂-双核配合物[CaCu(C3H2O4)2(H2O)4]n的合成、晶体结构及热稳定性

The title complex, [CaCu(C3H2O4)2(H2O)4]n, with a formula of C6H12CaCuO12 and Mr=379.78 has been sy-nthesized and characterized by single crystal X-ray diffraction structure analysis, elemental analysis, IR spectra and TG-DTG techniques. The results show that the crystal is Orthorhombic, space group Pbcn with a=0.669 21(5) nm, b=1.370 23(5) nm, c=1.322 39(10) nm, V=1.212 59(16) nm3, Dc=2.080 g·cm-3, μ=2.288 mm-1, F(000)=772 and Z=4. The final R=0.054 0 and wR=0.112 8 for 1 189 observed reflections with I>2σ(I). The structure of the title complex consists of CaO8 polyhedra and CuO6 elongated octahedra linked together by malonate ligands. The Ca(Ⅱ) cation, on a twofold axis, is coordinated by two water molecules and six malonate O atoms. The Cu(Ⅱ) cation, which lies in a centre of symmetry in an octahedral arrangement, is coordinated by four malonate O atoms and two water molecules. The structure comprises alternating layers along the [101] plane, with the shortest Cu…Cu distance of 0.762 46(6) nm. The whole 3D structure is maintained and stabilized by the presence of hydrogen bonds. Its thermo gravimetric analysis was determined by TG-DTG techniques. CCDC:663184.