873866-20-7Relevant academic research and scientific papers
Three interpenetrated frameworks constructed by long flexible N,N′-bipyridyl and dicarboxylate ligands
Li, Xiao-Ju,Cao, Rong,Bi, Wen-Hua,Wang, Yan-Qin,Wang, Yu-Ling,Li, Xing
, p. 2955 - 2962 (2005)
Three interpenetrated polymeric networks, {[Co(bpp)(OH-BDC)]·H 2O}n (1) [Ni(bpp)1.5(H2O)(OH-BDC)] n (2) and {[Cd(bpp)(H2O)(OH-BDC)]·2H 2O}n (3), have been prepared by hydrothermal reactions of 1,3-bis(4-pyridyl)propane (bpp), 5-hydroxyisophthalic acid (OH-H 2BDC), with Co(NO3)2·6H2O, Ni(NO3)2·6H2O and Cd(NO 3)2·4H2O, respectively. Single-crystal X-ray diffraction analyses reveal that the three compounds all exhibit interpenetrated but entirely different structures. Compound 1 is a fourfold interpenetrated adamantanoid structure with water molecules as space fillers, in which bpp adopts a TG conformation (T = trans, G = gauche). Compound 2 is an interdigitated structure from the interpenetrated long arms of one-dimensional molecular ladders, while bpp in 2 adopts both TT and TG conformations. Compound 3 is a twofold interpenetrated three-dimensional network from a one-dimensional metal-carboxylate chain bridged by TG conformational bpp. The hydrogen bonding interactions in 1-3 further stabilize the whole structural frameworks and play critical roles in their constructions.
