1630758-11-0Relevant articles and documents
Zinc metal-organic frameworks based on a flexible benzylaminetetracarboxylic acid and bipyridine colinkers
Wang, Chao,Tang, Sifu,Lv, Xiaoxia,Li, Liangjun,Zhao, Xuebo
, p. 3133 - 3139 (2014/07/21)
Three new metal-organic frameworks (MOFs), [Zn2(L)(H 2O)]·3DMF·1.5H2O (1), [Zn 2(L)(4,4-bpy)1.5(H2O)2] ·2DMF·2H2O (2), and [Zn2(L)(2,2-bpy) 2(DMF)2]·2DMF·4H2O (3) [H 4L = 5,5-(2,3,5,6-tetramethyl-1,4-phenylene)bis(methylene) bis(azanediyl)diisophthalic acid, 4,4-bpy = 4,4-bipyridine, 2,2-bpy = 2,2-bipyridine, DMF = N,N-dimethylformamide], were synthesized under solvothermal conditions and characterized by single-crystal X-ray diffraction analysis, elemental analysis, IR spectroscopy, powder X-ray diffraction (PXRD), and thermogravimetric analysis (TGA). The L4- ligands in 1-3 display different coordination modes, and the introduction of bipyridine colinkers brings significant structural variation into the frameworks. Complex 1 is constructed from dinuclear carboxylate [Zn2O(COO)4] secondary building units (SBUs) and H4L ligands and exhibits a binodal (4,4)-connected pts net with 54.6 % solvent-accessible void. Complex 2 exhibits an unprecedented tetranodal (3,4,4,4)-connected net, which is constructed from two types of crystallographically independent ZnII ions, H4L ligands, and the 4,4-bipyridine colinker. Complex 3 is constructed from parallel 1D molecular ladders stacked along the a axis that generate 1D channels (7.8 × 10.4 A?) and are hydrogen bonded to form 2D layers. The thermal stabilities and luminescence properties of 1-3 have also been studied in detail. Copyright
