title: Field-Induced Slow Magnetic Relaxation and Gas Adsorption Properties of a Bifunctional Cobalt(II) Compound.
abstract: A new compound, {[Co(bmzbc)2] · 2DMF}n (JXNU-1, JXNU denotes Jiangxi Normal University), based on the 4-(benzimidazole-1-yl)benzoate (bmzbc(-)) ligand has been synthesized and structurally characterized. The Co(II) ions are bridged by the rod-like bmzbc(-) ligands to give a two-dimensional (2D) sheet wherein the Co(II) ions are spatially separated from each other by the long bmzbc(-) rods. The 2D sheets are further stacked into a 3D framework with 1D channels occluding the guest DMF molecules. Detailed magnetic studies show that the individual octahedral Co(II) ions in JXNU-1 exhibit field-induced slow magnetic relaxation, which is characteristic behavior of single-ion magnets (SIMs). The rarely observed positive value of zero-field splitting (ZFS) parameter D for the Co(II) ion in JXNU-1 demonstrates that JXNU-1 is a unique example of Co(II)-based SIMs with easy-plane anisotropy, which is also confirmed by the calculations. The microporous nature of JXNU-1 was established by measuring CO2 sorption isotherms. The abrupt changes observed in the C3H8 and C2H6 adsorption isotherms indicate that a structural transformation occurred in the gas-loading process. The long connection between the magnetic metal centers in JXNU-1 meets the requirements for construction of porosity and SIM in a well-defined network, harmoniously providing a good candidate of functional molecular materials exhibiting SIM and porosity.
authors.affiliation: College of Chemistry and Chemical Engineering, Jiangxi Normal University , Nanchang, Jiangxi 330022, P. R. China.
authors.forename: Yu-Ling
authors.initials: YL
authors.lastname: Wang
authors.affiliation: College of Chemistry and Chemical Engineering, Jiangxi Normal University , Nanchang, Jiangxi 330022, P. R. China.
authors.forename: Lin
authors.initials: L
authors.lastname: Chen
authors.affiliation: Beijing National Laboratory for Molecular Sciences, Institution of Chemistry, Chinese Academy of Sciences, Center for Molecular Sciences , Beijing 100190, P. R. China , and.
authors.forename: Cai-Ming
authors.initials: CM
authors.lastname: Liu
authors.affiliation: Jiangsu Key Laboratory for NSLSCS, School of Physical Science and Technology, Nanjing Normal University , Nanjing 210023, P. R. China.
authors.forename: Yi-Quan
authors.initials: YQ
authors.lastname: Zhang
authors.affiliation: College of Chemistry and Chemical Engineering, Jiangxi Normal University , Nanchang, Jiangxi 330022, P. R. China.
authors.forename: Shun-Gao
authors.initials: SG
authors.lastname: Yin
authors.affiliation: College of Chemistry and Chemical Engineering, Jiangxi Normal University , Nanchang, Jiangxi 330022, P. R. China.
authors.forename: Qing-Yan
authors.initials: QY
authors.lastname: Liu