具有三维氢键网络结构的四溴对苯二甲酸铅一维配位聚合物的合成、表征与晶体结构(英文)  

Synthesis,characterization,and crystal structure of a 1-D Pb~Ⅱ coordination polymer with tetrabromoterephthalate showing 3-D hydrogen-bonding architecture

作　　者：孙鹏[1] 李程鹏[1] 

机构地区：[1]天津师范大学化学与生命科学学院,天津300387

出　　处：《天津师范大学学报（自然科学版）》2009年第3期39-42,共4页Journal of Tianjin Normal University：Natural Science Edition

基　　金：Financial support fromthe National Natural Science Foundation of China(20671071).

摘　　要：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.Assembly of tetrabromoterephthalic acid （ H2TBTA ） with Pb （OAc）2 in DMF/H2O/CH3OH solution using the layered diffusion method affords a 1-D coordination polymer {[Pb（TBTA）（DMF）2]（DMF）2 }n（1）, which has been characterized by elemental analysis, IR and single-crystal X-ray diffraction. Complex 1 crystallizes in monoclinic system, space group C2/c with a=1. 623 1（4） nm, b=1. 012 3（2） nm, c=2. 029 0（6） nm, β=106. 999（3）°, V=1. 034 9 nm^3 , Z=4. In the structure of 1, each octahedral Pb^Ⅱ atom is coordinated by six oxygen donors from a pair of chelating carboxylate groups of different TBTA anions as well as two DMF molecules. The adjacent Pb（Ⅱ） centers are connected by the TBTA bridges to afford a 1-D polymeric chain motif. Interestingly, analysis of crystal packing reveals that these 1-D arrays are further extended by weak interchain C-H…O interactions between the DMF ligands to result in a 3-D supramolecular framework with the inclusion of lattice DMF guests.

关 键 词：配位聚合物 四溴对苯二甲酸盐 PbⅡ 超分子结构 C-H…O氢键 

分 类 号：O641[理学—物理化学]