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- Title
Two Six-Connected MOFs with Distinct Architecture: Synthesis, Structure, Adsorption, and Magnetic Properties.
- Authors
Ren, Guo‐Jian; Han, Song‐De; Liu, Yan‐Qing; Hu, Tong‐Liang; Bu, Xian‐He
- Abstract
By assembling CoII ions and a combination of 5-(4-pyridyl)tetrazole (4-ptz) and formate ions, two distinct metal-organic frameworks, [Co3(4-ptz)5(HCOO)(H2O)2] and [Co3(4-ptz)4(dmf)2(HCOO)2 ] (dmf= N, N′-dimethylformamide), were synthesized. They were both characterized by single-crystal X-ray diffraction, IR spectroscopy, thermogravimetric analysis, and powder X-ray diffraction. Structural analyses revealed that by slightly modulating the coordination environment of the trinuclear cobalt cluster, two complexes were formed featuring unusual six-connected nets reminiscent of a pyrazole-type linear trinuclear cobalt cluster as compared with the classic eight-connected bcu topology. In addition, [Co3(4-ptz)5(HCOO)(H2O)2] interacted strongly with CO2, with an adsorption enthalpy of 29.2 kJ mol−1, and in a selectivity study, the uptake ratios of CO2/N2 (from a 15:85 mixture) and CO2/CH4 (50:50 mixture) were 77.6 and 37.7, respectively. Magnetic studies on both complexes revealed weak antiferromagnetic coupling between the CoII ions.
- Subjects
METAL-organic frameworks; CHEMICAL synthesis; ADSORPTION (Chemistry); MAGNETIC properties; DIMETHYLFORMAMIDE; X-ray diffraction
- Publication
ChemPlusChem, 2016, Vol 81, Issue 8, p775
- ISSN
2192-6506
- Publication type
Article
- DOI
10.1002/cplu.201600092