Discrepant gas adsorption in isostructural heterometallic coordination polymers: strong dependence of metal identity

作者：Huang Sheng Li; Zhang Long; Lin Yue Jian; Jin Guo Xin^*

来源：CrystEngComm, 2013, 15(1): 78-85.

DOI：10.1039/c2ce26072g

Two isostructural porous 3d-4d materials [M(cyclam)Pd(2,4-pydc)(2)center dot 4H(2)O](n) (2,4-H(2)pydc = pyridine-2,4-dicarboxylate acid) (1, M = Ni and 2, M = Zn) and five other isostructural complexes {[M'(cyclam)](2)[M(2,5-pydc)(3)]center dot xH(2)O}(n) (2,5-H(2)pydc = pyridine-2,5-dicarboxylate acid) (3, M = Co, M' = Ni; 4, M = M' = Ni; 5, M = Zn, M' = Ni; 6, M = Ni, M' = Zn and 7, M = M' = Zn) were synthesized. Both complexes 1' and 2' show high selective CO2 capture over CH4 and N-2. The comparisons of different gas sorption properties between 1' and 2' strongly suggest that metal identity has a great influence on the polarity of frameworks, but just the polar molecules respond to the polarity changes of different frameworks. The comparisons of CO2 sorption properties between five other isostructural complexes 3'-7' also strongly suggest that metal identity has great influence on polarity of frameworks and further the CO2 uptake.

• 出版日期2013
• 单位复旦大学