本文合成了7,8,17,18-四溴-5,10,15,20-四苯基-21,23(H)-卟啉(H_2TPPBr_4)及其金属配合物MTPPBr_4[M=Cu(Ⅱ),Ni(Ⅱ),Co(Ⅱ)和Zn(Ⅱ)],测定了它们的可见紫外光谱和循环伏安,用四轨道模型(Four Orbital Model)计算了MTPPBr_4的相对前线轨...本文合成了7,8,17,18-四溴-5,10,15,20-四苯基-21,23(H)-卟啉(H_2TPPBr_4)及其金属配合物MTPPBr_4[M=Cu(Ⅱ),Ni(Ⅱ),Co(Ⅱ)和Zn(Ⅱ)],测定了它们的可见紫外光谱和循环伏安,用四轨道模型(Four Orbital Model)计算了MTPPBr_4的相对前线轨道,并解释了配合物的可见紫外光谱及电化学性质.测定了NiTPPBr_4的晶体结构,晶体属单斜晶系,空间群为C2/c,a=2.6077(7),b=1.0414(4),c=1.9312(3)nm,β=137.1(7)°,Z=4,最后偏离因子R=0.067,晶体结构直接证明了卟啉亲电溴化反应具有区域选择性,四个溴分布在相对两个吡咯环上.展开更多
The experimental investigation on the conformation of a thermotropic main-chain nematic polymer by small-angle X-ray scattering (SAXS) has been carried out. The average radius of gyration of the polymer has been deter...The experimental investigation on the conformation of a thermotropic main-chain nematic polymer by small-angle X-ray scattering (SAXS) has been carried out. The average radius of gyration of the polymer has been determined in nematic and isotropic state respectively. The experiment shows that the boundary between domains is not sharp but diffuse, and the diffuse-boundary thickness of the polymer as a function of temperature has been given.展开更多
The copper(Ⅱ) complex [Cu_3(nta)_2(azpy)_2(H_2O)_2]·6H_2O (nta =nitrilotriacetate, azpy = 4,4′-azobispyridine) has been synthesized and characterized. The X-rayanalysis reveals that there are two kinds of copp...The copper(Ⅱ) complex [Cu_3(nta)_2(azpy)_2(H_2O)_2]·6H_2O (nta =nitrilotriacetate, azpy = 4,4′-azobispyridine) has been synthesized and characterized. The X-rayanalysis reveals that there are two kinds of copper(Ⅱ) coordination environments. Cu(1) has adistorted square plane symmetry and Cu(2) has a distorted octahedral symmetry. Cu(1) is linked toCu(2) through nta and bound to Cu(1C) by azpy, and Cu(2) is linked to Cu(2A) through azpy, whichextends to two-dimensional network with large rhombus 1.2 nm x 1.7 nm.展开更多
文摘本文合成了7,8,17,18-四溴-5,10,15,20-四苯基-21,23(H)-卟啉(H_2TPPBr_4)及其金属配合物MTPPBr_4[M=Cu(Ⅱ),Ni(Ⅱ),Co(Ⅱ)和Zn(Ⅱ)],测定了它们的可见紫外光谱和循环伏安,用四轨道模型(Four Orbital Model)计算了MTPPBr_4的相对前线轨道,并解释了配合物的可见紫外光谱及电化学性质.测定了NiTPPBr_4的晶体结构,晶体属单斜晶系,空间群为C2/c,a=2.6077(7),b=1.0414(4),c=1.9312(3)nm,β=137.1(7)°,Z=4,最后偏离因子R=0.067,晶体结构直接证明了卟啉亲电溴化反应具有区域选择性,四个溴分布在相对两个吡咯环上.
文摘The experimental investigation on the conformation of a thermotropic main-chain nematic polymer by small-angle X-ray scattering (SAXS) has been carried out. The average radius of gyration of the polymer has been determined in nematic and isotropic state respectively. The experiment shows that the boundary between domains is not sharp but diffuse, and the diffuse-boundary thickness of the polymer as a function of temperature has been given.
文摘The copper(Ⅱ) complex [Cu_3(nta)_2(azpy)_2(H_2O)_2]·6H_2O (nta =nitrilotriacetate, azpy = 4,4′-azobispyridine) has been synthesized and characterized. The X-rayanalysis reveals that there are two kinds of copper(Ⅱ) coordination environments. Cu(1) has adistorted square plane symmetry and Cu(2) has a distorted octahedral symmetry. Cu(1) is linked toCu(2) through nta and bound to Cu(1C) by azpy, and Cu(2) is linked to Cu(2A) through azpy, whichextends to two-dimensional network with large rhombus 1.2 nm x 1.7 nm.
