两个由2，3，5-吡啶三酸构筑的三维网状配位聚合物的合成、晶体结构和性质研究  

Synthesis, Crystal Structure and Properties of Two 3D Coordination Polymers with 2,3,5-Pyridinetricarboxylate

作　　者：夏军[1] 李田田[1] 龚小林[1] 郑春明[1] 

机构地区：[1]天津工业大学环境与化学工程学院 中空纤维膜材料与膜过程省部共建国家重点实验室培育基地,天津300387

出　　处：《无机化学学报》2014年第7期1535-1541,共7页Chinese Journal of Inorganic Chemistry

基　　金：国家自然科学基金(No.21101113,51208357)资助项目

摘　　要：2,3,5-吡啶三酸在水热条件下分别与Mn(CH3COO)2·4H2O和Co(CH3COO)2·4H2O反应,得到了2种金属有机骨架(MOFs)配合物[Mn1.5(2,3,5-pta)(H2O)4]n(1)和[Co1.5(2,3,5-pta)(H2O)4]n(2),其中2,3,5-H3pta=2,3,5-吡啶三酸。利用元素分析、红外、热重和X-射线单晶衍射分析进行了表征。分析结果表明2个配合物属于同构晶体:晶系为单斜,空间群为P21/c,其中,吡啶三酸配体完全脱去3个质子,并分别与4个六配位的金属离子相连,在空间形成一种三维网络状结构。热重分析表明,配合物1的稳定性要高于配合物2。Reactions of 2,3,5-pyridinetricarboxylic acid and Mn（CH3COO）2·4H2O or Co（CH3COO）2·4H2O under hydrotherrnal conditions, yielded two new metal organic frameworks of [Mn1.5（2,3,5-pta）（H2O）4]n （1） and [Co1.5（2,3,5- pta）（H2O）4]n （2） （2,3,5-H3pta=2,3,5-pyridinetricarboxylic acid）, respectively, which have been structurally characterized by elemental analysis, infrared spectroscopy, thermogravimetric analysis and single-crystal X-ray diffraction. The results of structural analysis reveal that two complexes are isostructural which both crystallized in monoclinic system with space group of P2 1/c. In the complexes, 2,3,5-pyridinetricarboxylic acid ligand lost all three protons and connected with four 6-coordinated metal ions to form a kind of three dimensional framework. And the thermal gravimetric analysis has shown that the complex 1 is more stable than complex 2.

关 键 词：2 3 5-吡啶三酸 金属有机骨架 晶体结构 热稳定性 

分 类 号：O614.711[理学—无机化学] O614.812[理学—化学]