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A novel 3D metal-organic coordination polymer with helical chains based on a flexible 5-(imidazol-1-ylmethyl)isophthalic acid(H_2L) as a main ligand and 1,2-bis(4-pyridyl)ethane(bpa) as a N-containing ancillary ligand,[Cd L(bpa)_(0.5)]_n(1),has been obtained under hydrothermal conditions and characterized by elemental analysis,powder X-ray diffraction(PXRD),IR,thermal gravimetric analyses(TGA) and single-crystal X-ray diffraction.It crystallizes in monoclinic,space group P2_1/c with a = 10.984(2),b = 10.1829(12),c = 17.782(3) ?,β = 123.156(11)o,V = 1665.1(5) ?~3,Z = 4,Mr = 448.72,Dc = 1.790 g/cm~3,Rint = 0.0871,F(000) = 892,the final R = 0.0687 and w R = 0.1294 for 2920 observed reflections(I > 2σ(I)).In complex 1,the L~(2-) anions connect Cd(Ⅱ) ions to form two-dimensional metal-organic layers(Cd_2L_2)n,in which the 1D helical chains(Cd-L)_n are alternately arranged in a right-and left-handed sequence.These layers are further linked to build a 3D network by the bpa ligand.In addtion,photoluminescent properties for 1 are also investigated.
A novel 3D metal-organic coordination polymer with helical chains based on a 5- (imidazol-1-ylmethyl) isophthalic acid (H_2L) as a main ligand and 1,2-bis (4-pyridyl) ethane N-containing ancillary ligand, [Cd L (bpa) _ (0.5)] _ n (1), has been obtained under hydrothermal conditions and characterized by elemental analysis, powder X-ray diffraction (PXRD), IR, thermal gravimetric analyzes ) and single-crystal X-ray diffraction. If crystallizes in monoclinic space group P2_1 / c with a = 10.984 (2), b = 10.1829 (12), c = 17.782 (3) , R = 0.0871, F (000) = 892, the final R = 0.0687 and w R = 0.1294 for V = 1665.1 (5)? ~ 3, Z = 4, Mr = 448.72, Dc = 1.790 g / In complex 1, the L ~ (2-) anions connect Cd (Ⅱ) ions to form two-dimensional metal-organic layers (Cd_2L_2) n, in which the 1D helical chains (Cd-L) _n are alternately arranged in a right-and left-handed sequence. These layers are further linked to build a 3D network by the bpa ligand. Addti on, photoluminescent properties for 1 are also investigated.