配位聚合物[Co_2(C_(13)H_(10)NO_2)_4(4,4′-bipy)_2]_n的合成、晶体结构、热稳定性及荧光性质

Synthesis, Crystal Structure, Thermal Stability and Fluorescence Properties of [Co_2(C_(13)H_(10)NO_2)_4(4,4′-bipy)_2]_n

以N-苯基邻氨基苯甲酸(NPA)、CoSO4和4,4′-联吡啶为原料,溶液法合成了一个新的配位聚合物[Co2(C13H10NO2)4(4,4′-bipy)2]n,并对其进行了红外、元素分析、热重、荧光及X射线衍射等表征与研究。测定结果表明,该配合物晶体属三斜晶系,空间群P1,晶胞参数:a=1.08699(13)nm,b=1.13623(13)nm,c=1.41472(16)nm,α=71.8860(10)°,β=76.374(2)°,γ=66.1770(10)°,V=1.5070(3)nm3,Dc=1.409g·cm-3,Z=2,F(000)=662。最终GOF=1.028,最终偏离因子R1=0.0437,wR2=0.0794。中心Co(Ⅱ)离子分别与2个联吡啶N原子,4个羧基氧原子配位形成六配位的变形八面体结构。其中1个NPA分子的羧基以螯合方式与Co(Ⅱ)金属原子配位,另2个NPA分子的羧基以桥联的方式与相邻的2个Co(Ⅱ)离子配位,形成一个双核Co簇的二级构筑单元。此双核Co簇通过4,4′-联吡啶分子连接起来,最终形成形成一维双链梯状结构。

Using N-phenylanthranilic acid （NPA）, CoSO4 and 4,4′-bipyridine as starting material, one new coordination polymer [Co2（C13H10NO2）4（4,4′-bipy）2]n has been synthesized by solution method and characterized by IR, elemental analysis, TGA, luminescence and X-ray diffraction methods. The crystallography reveals that complex crystallizes in the triclinic space group P1, with a=1.086 99（13） nm, b=1.136 23（13） nm, c=1.414 72（16） nm, α=71.886 0（10）°, β=76.374（2）°, γ=66.177 0（10）°, V=1.507 0（3） nm3, Dc=1.409 g·cm-3, Z=2, F（000）=662. Final GOF=1.028, R1=0.043 7, wR2=0.079 4. The centric Co（Ⅱ） ion is coordinated with two N atoms from two 4,4′-bipyridine molecules, and four O atoms from three N-phenylanthranilic acid molecules forming a distorted octahedral coordination geometry. One of the N-phenylanthranilic acid chelates the Co（Ⅱ） ion, while the other two N-phenylanthranilic acid molecules connect another Co（Ⅱ） ion with monodentate motif to form a binuclear cluster SBUs （second building units）. The SBUs are further linked by 4,4′-bipyridine ligand forming an one-dimensional double-chain ladder-like structure. CCDC： 750883.