A [Cr₂Ni] coordination polymer: slow relaxation of magnetization in quasi-one-dimensional ferromagnetic chains

Abstract

The reaction of [Cr3IIIO(OAc)6(H2O)3]NO3·AcOH with 2-hydroxynaphthaldehyde, 2-amino-isobutyric acid and NiCl2·6H2O in MeOH, under basic and solvothermal conditions, led to the formation of the quasi-1D coordination polymer {[CrIII2NiII(L)4(MeOH)2]}n (where L = the dianion of the Schiff base between 2-hydroxynaphthaldehyde and 2-amino-isobutyric acid), which behaves as a ferromagnetic chain, displaying slow relaxation of magnetization.

Fine-Tuning the Porosities of the Entangled Isostructural Zn(II)-Based Metal–Organic Frameworks with Active Sites by Introducing Different N-Auxiliary Ligands: Selective Gas Sorption and Efficient CO2 Conversion

“…In recent decades, there has been growing interest in flexible and dynamic metal–organic frameworks (MOFs) due to their high selective sorption performance, structural adjustability, and recyclability, which can reversibly change their structures and properties in response to inclusion or exclusion of a guest. Thereby, MOFs could be excellent porous crystalline materials for gas adsorption and separation. − To date, much effort has been devoted to adjusting the porosity, pore volume, and surface area of MOFs for separating hydrocarbons and CO 2 . The reported strategies included the control of pore size, framework interpenetrations, open metal sites (OMSs), modified pore environments, etc. , Compared with these methods, synthesizing MOFs by improving the framework interpenetration and OMSs is more effective. − …”

“…Thereby, MOFs could be excellent porous crystalline materials for gas adsorption and separation. − To date, much effort has been devoted to adjusting the porosity, pore volume, and surface area of MOFs for separating hydrocarbons and CO 2 . The reported strategies included the control of pore size, framework interpenetrations, open metal sites (OMSs), modified pore environments, etc. , Compared with these methods, synthesizing MOFs by improving the framework interpenetration and OMSs is more effective. − …”

“…The reported strategies included the control of pore size, framework interpenetrations, open metal sites (OMSs), modified pore environments, etc. 13,14 Compared with these methods, synthesizing MOFs by improving the framework interpenetration and OMSs is more effective. 17−20 In this work, two similar skeleton organic ligands, 2-(imidazol-1-yl)terephthalic acid (H 2 L1) and 2-(1H-1,2,4triazol-1-yl)terephthalic acid (H 2 L2) (Figure S1…”