论文部分内容阅读
四溴对苯二甲酸(H2TBTA)与醋酸铅在DMF/H2O/CH3OH溶剂中通过分层扩散法组装得到一维配位聚合物{[Pb(TBTA)(DMF)2](DMF)2}n(1),利用元素分析、红外光谱及X-射线单晶衍射法对其进行了表征.化合物1属于单斜晶系,C2/c空间群,晶胞参数为a=1.623 1(4)nm,b=1.012 3(2)nm,c=2.029 0(6)nm,β=106.999(3)o,V=1.034 9 nm3,Z=4.在1的晶体结构中,每个八面体铅离子分别与来自2个TBTA的一对螯合羧基以及2个DMF分子上的6个氧原子配位,相邻的PbⅡ离子通过TBTA桥联形成一维配位链结构.晶体堆积分析结果表明,相邻配位链上的DMF配体之间存在C—H…O弱相互作用,将一维配位链拓展为三维超分子结构,且晶格DMF客体包结于此三维网络中.
One-dimensional coordination polymers {[Pb (TBTA) (DMF) 2] (DMF) 2} n (TBT) and lead acetate were synthesized via layered diffusion in DMF / 1) was characterized by elemental analysis, IR and X-ray single crystal diffraction.The compound 1 belongs to the monoclinic space group C2 / c with unit cell parameters of a = 1.623 1 (4) nm, b = 1.012 3 (2) nm, c = 2.029 0 (6) nm, β = 106.999 (3) o, V = 1.034 9 nm3, and Z = 4. In the crystal structure of 1, With a pair of chelating carboxyl groups from two TBTAs and six oxygen atoms of two DMF molecules, adjacent PbⅡs are bridged by TBTA to form one-dimensional coordination chain structure.The results of crystal packing analysis show that adjacent There is a weak C-H ... O interaction between the DMF ligands on the coordination chain, which expands the one-dimensional coordination chain into a three-dimensional supramolecular structure, and the lattice DMF guest is entrapped in the three-dimensional network.