New porous Co(II)-based metal-organic framework including 1D ferromagnetic chains with highly selective gas adsorption and slow magnetic relaxation

摘要

A new porous metal-organic framework, namely [Co-3(L)(OH)(2)(H2O)(4)]center dot NMP center dot 3H(2)O (1), has been yielded by using Co(II) and rigid V-shaped 2,6-di(2',5'-dicarboxylphenyl)pyridine (H4L). The structure analysis revealed that MOF 1 is a three-dimensional (3D) porous framework with 1D [Co-3(OH)(2)](n) ferromagnetic chains. The gas sorption measurements and the LAST analysis indicated MOF 1 has a relatively high selectivity for C2H6 and CO2 over CH4. The magnetic properties indicated that MOF 1 has the ferrimagnetic and slow magnetic relaxation behavior, giving an interesting single-chain magnet behavior with an effective energy barrier of 15.82 K.