8-喹啉氧基乙酸铅(Ⅱ)一维配位聚合物的合成、晶体结构和性质

采用水热法合成了一个新的一维铅(Ⅱ)配位聚合物[Pb(QOA)2]n(QOA=8-喹啉氧基乙酸根离子),通过红外光谱、元素分析和X-射线单晶衍射分析给予表征。该配位聚合物属于单斜晶系,C2/c空间群。晶胞参数a=2.113 2(2)nm,b=1.189 86(7)nm,c=0.790 73(2)nm,β=99.081(3)°,V=1.963 3(4)nm3,Z=4。固体UV-Vis-NIR漫反射光谱结果显示它的光学能隙约为3.4 eV,表明配合物具有潜在的半导体性质。固体荧光测定表明配合物表现出良好的荧光性质。     

A Novel Two-dimensional Lead(Ⅱ) Coordination Polymer Based on Dinuclear Lead(Ⅱ) Unit Containing(5-Chloro-quinolin-8-yloxy) Acetate

A novel two-dimensional lead(II) coordination polymer 1, [C11H7Cl2NO3Pb]n, has been prepared by solvothermal reaction of new bridging ligand(5-chloro-quinolin-8-yloxy)acetic acid(HL) with PbCl2, and its structure was characterized by IR, elemental analysis, TG-DTA and single-crystal X-ray diffraction analysis. The crystal is of monoclinic system, space group P21/c with a = 16.7603(7), b = 8.6907(4), c = 8.4745(3), β = 101.1110(11)°, C11H7Cl2NO3 Pb, Mr = 479.27, V = 1211.25(9)3, Z = 4, Dc = 2.628 g/cm3, F(000) = 880, μ = 14.367 mm-1, R = 0.0173 and wR = 0.0508. The asymmetric unit contains one lead(II) cation, one(5-chloro-quinolin-8-yloxy)acetate(L) ligand and a chloride ion. The PbII center is hepta-coordinated in a distorted pentagonal bipyramidal geometry. The coordination sphere of the Pb atom is completed by two oxygen atoms and one nitrogen atom of the same L ligand, two bridging chloride ions and two bridging oxygen atoms of two adjacent L ligands. Two PbII centers are linked by the two L ligands to form a C2-symmetric dimer unit with a planar [Pb2O2] ring. Each dimer unit acts as a secondary building unit(SBU) and links adjacent four dimer units by the chloride atoms and oxygen atoms of carboxylate groups of L, forming a two-dimensional array. Such two-dimensional layers are packed through intermolecular C–H···Cl hydrogen bonds into a three-dimensional supramolecular structure. When the dimer unit is viewed as a 4-connected node, 1 is simplified as a 4-nodal 2-D network with square lattices of the diagonal lengths to be 6.079(1). The fluorescence emission peak of complex 1 appears near 407 nm.     

Solvothermal Synthesis and Crystal Structure of a 1D Helical-chain Cobalt（II） Complex Containing （Quinolin-8-yloxy）acetate

The cobalt(II) complex with (quinolin-8-yloxy)acetate, [CoCl(C11H8NO3)]n (1), has been prepared via the solvothermal method and characterized by IR, elemental analysis, UV- Vis diffuse-reflection spectra and single-crystal X-ray diffraction analysis. Complex 1 is a novel carboxylate-bridged one-dimensional helical cobalt(II) polymer, and the Co(II) centre exhibits an approximately square pyramidal CoClNO3 coordination geometry. It crystallizes in monoclinic, space group P21/n, with a = 9.1594(10), b = 6.8864(7), c = 17.290(2) , β = 102.629(3)o, C11H8ClCoNO3, Mr = 296.56, V = 1064.2(2) 3, Z = 4, Dc = 1.851 g/cm3, F(000) = 596, μ = 1.856 mm-1, the final R = 0.0308 and wR = 0.0807. Interestingly, the chain complexes are assembled to form two-dimensional networks through intermolecular face-to-face π-π stacking interactions with the centroid-to-centroid distance of 3.559(1)  and the dihedral angle of 8.4(1)° between the aromatic rings.     

8-喹啉氧基乙酸铅(Ⅱ)一维配位聚合物的合成、晶体结构和性质

采用水热法合成了一个新的一维铅（Ⅱ）配位聚合物[Pb（QOA）₂]_n（QOA=8-喹啉氧基乙酸根离子）,通过红外光谱、元素分析和X-射线单晶衍射分析给予表征。该配位聚合物属于单斜晶系,C2/c空间群。晶胞参数a=2.1132（2）nm,b=1.18986（7）nm,c=0.79073（2）nm,β=99.081（3）°,V=1.9633（4）nm³,Z=4。固体UV-Vis-NIR漫反射光谱结果显示它的光学能隙约为3.4eV,表明配合物具有潜在的半导体性质。固体荧光测定表明配合物表现出良好的荧光性质。