Temperature, Cooling Rate, and Additive-Controlled Supramolecular Isomerism in Four Pb(II) Coordination Polymers with an in Situ Ligand Transformation Reaction
作者:Dongsheng Deng、Leilei Liu、Bao-Ming Ji、Guojie Yin、Chenxia Du
DOI:10.1021/cg300900m
日期:2012.11.7
Solvothermal reactions of Pb(Ac)2 with a new flexible 1,3-bis(4-pyridyl-3-cyano)propane (1, BPCP) ligand under different synthesis conditions via an in situ ligand transformation reaction produced three true coordination polymorphs, namely, [PbL2–]n (for 2 and 3) and [Pb3L2–3]n (4), as well as their polymorphic framework [(Pb2L2–)·2H2O]n (5) (H2L = 1,3-bis(4-pyridyl-3-carboxyl)propane). These compounds
Pb(Ac)2与新的柔性1,3-双(4-吡啶基-3-氰基)丙烷(1,BPCP)配体在不同合成条件下的溶剂热反应通过原位配体转化反应产生了三个真正的配位多晶型,即,[PBL 2- ] ñ(对于2和3)和[铅3大号2- 3 ] ñ(4),以及它们的多晶型框架[(铅2大号2- )·2H 2 O] ñ(5)(高2L = 1,3-双(4-吡啶基-3-羧基)丙烷)。这些化合物通过元素分析,IR,TG,PXRD和单晶X射线衍射进行表征。在这些化合物中,L 2–配体表现出不同的配位构象和模式,可通过不同的合成条件(包括反应温度,冷却速率和添加剂)进行调节,并通过桥接各种建筑单元来构建各种结构。多晶型物2和3显示从双核环状[铅建立1D频道的3D框架2大号2- 2 ]单元和双核半环状铅[Pb 2大号2-分别]单元。多晶型物4还设有从双核环状[铅构成的三维结构2大号2- 2 ]单元由L相通2-配体。有趣的是,4