Wang Xin-Yi, Justice Rachelle, Sevov Slavi C
Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, USA.
Inorg Chem. 2007 May 28;46(11):4626-31. doi: 10.1021/ic070324p. Epub 2007 Apr 27.
Soft molecular host frameworks made of the hydrogen-bonded metal complex (MC) Co(NH3)(6)3+ and 4,4'-biphenyldisulfonate (BPDS) include different guest molecules to form inclusion compounds of the type (MC)2(BPDS)3.n(guest). Structurally characterized were six compounds with guest molecules of DMSO, DMF, piperidine, acetone, acetonitrile, and THF. The metal-complex sulfonate frameworks in all of them are of the pillared layer type where the layers are constructed of extensively hydrogen-bonded metal-complex cations and sulfonate (S) anions (and some hydrogen-bonded water) while the organic residues of the 4,4'-biphenyldisulfonate serve as pillars. The hydrogen-bonded MCS layers and the orientations of the pillars adjust and rearrange in order to generate cavities that would accommodate different guest molecules. The steric, electronic, and hydrogen-bonding needs of the guest molecules mold the soft framework into different structures. These MCS host-guest frameworks are very close structural analogues of the well-studied guanidinium sulfonate (GS) networks and mimic their flexibility and overall durability.
由氢键金属配合物（MC）Co(NH3)(6)3+和4,4'-联苯二磺酸盐（BPDS）构成的软分子主体框架包含不同客体分子，形成（MC）2(BPDS)3.n(客体)类型的包合物。对六种分别含有二甲基亚砜、二甲基甲酰胺、哌啶、丙酮、乙腈和四氢呋喃客体分子的化合物进行了结构表征。它们中所有的金属配合物磺酸盐框架均为柱撑层型，其中层由广泛氢键连接的金属配合物阳离子和磺酸盐（S）阴离子（以及一些氢键连接的水）构成，而4,4'-联苯二磺酸盐的有机残基充当支柱。氢键连接的MCS层和支柱的取向会调整和重新排列，以生成可容纳不同客体分子的空腔。客体分子在空间、电子和氢键方面的需求将软框架塑造为不同结构。这些MCS主客体框架是经过充分研究的胍盐（GS）网络的非常接近的结构类似物，并模仿了它们的灵活性和整体耐久性。
