摘要
A novel two-dimensional coordination polymer [Ba2(phen)4(tp)2]n (phen = 1,10- phenanthroline, tp = terephthalic acid) has been synthesized with tp as bridge ligands and structurally determined by X-ray crystallography. The crystal belongs to the monoclinic system, space group C2/c, with a = 18.877(4), b = 18.489(4), c = 15.658(3) A, β = 103.61(3)°, V= 5311.5(19)A^3, C32H20O4N4Ba, Mr = 661.86, Z= 8, F(000) = 2624,μ= 1.542 mm^-1, Dc= 1.655 g/cm^3, the final R = 0.0228 and wR = 0.0554 for 6063 observed reflections (I 〉 2σ(I)). The structural analysis shows that each tp ligand bridges barium atoms to form a two-dimensional infinite layer. There are aromatic π-π stacking interactions between neighboring layers, and aromatic π-π interactions further extend such layers into a three-dimensional supramolecular framework.
A novel two-dimensional coordination polymer [Ba2(phen)4(tp)2]n (phen = 1,10- phenanthroline, tp = terephthalic acid) has been synthesized with tp as bridge ligands and structurally determined by X-ray crystallography. The crystal belongs to the monoclinic system, space group C2/c, with a = 18.877(4), b = 18.489(4), c = 15.658(3) A, β = 103.61(3)°, V= 5311.5(19)A^3, C32H20O4N4Ba, Mr = 661.86, Z= 8, F(000) = 2624,μ= 1.542 mm^-1, Dc= 1.655 g/cm^3, the final R = 0.0228 and wR = 0.0554 for 6063 observed reflections (I 〉 2σ(I)). The structural analysis shows that each tp ligand bridges barium atoms to form a two-dimensional infinite layer. There are aromatic π-π stacking interactions between neighboring layers, and aromatic π-π interactions further extend such layers into a three-dimensional supramolecular framework.
基金
supported by the grants from Program for New Century Excellent Talents in University (NCET-04-0987)
Specialized Research Fund for the Doctoral Program of Higher Education (No 200507550033)