Two Metal-Carboxylate Frameworks Featuring Uncommon 2D + 3D and 3-Fold-Interpenetration: (3,5)-Connected Isomeric hms and gra Nets
作者： Lei Hou , Jie-Peng Zhang , Xiao-Ming Chen
DOI: 10.1021/CG801308U
关键词: SBus 、 Stereochemistry 、 Chemistry 、 Crystallography 、 Metal 、 Steric effects 、 Hexagonal crystal system 、 Carboxylate 、 Ligand 、 Crystal structure 、 Solvothermal synthesis
摘要: Two new interpenetrated metal-carboxylate frameworks (MCFs) [(CH3)2NH2][Zn2(BDC)(BTB)][Zn3(BTB)2(H2O)2]·4DMA·2C2H5OH·7H2O (MCF-25, 1, H2BDC = 1,4-benzenedicarboxylic acid, H3BTB benzene-1,3,5-tribenzoic acid), and [(CH3)2NH2][Zn2(BDC)(BTB)]·3DMF·2H2O (MCF-26, 2), synthesized by solvothermal reaction room-temperature evaporation, respectively, are constructed Zn2(O2CR)5 (in 1 2) Zn3(O2CR)6 1) units incorporating mixed BDC2− BTB3− ligands. is composed of two different with 2D 63 bilayers a rare (3,5)-connected 3D hms net giving an interesting + framework, whereas 2 features novel 3-fold gra chiral, hexagonal helical channels. Structural analysis shows that the nets in strict isomers same components but steric arrangements, which derived from orientations axial carboxylate bridges isomeric SBUs.
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