Two topologically new trinodal cobalt(II) metal-organic frameworks characterized as a 1D metallic oxide and a 2D→3D penetrated porous solid

Two novel Co(II) metal-organic frameworks, {[Co-2(OH)(cnp-ipa)(EtOH)(H2O)]}(n) (1) and {[Co-3(cnp-ipa)(2)(bpa)(4)(H2O)(2)]}(I) (2) (Hcnp-H(2)ipa = 5-(4-carboxy-2-nitrophenoxy)isophthalic acid, bpa = 1,2-bis(4-pyridyl)ethane), have been prepared and characterized. The single crystal X-ray diffractions reveal that both MOFs exhibit 3-nodal networks with new topological prototypes. MOF 1 possesses a (5,6,8)-connected 3D lattice with a new {3(2).4(4).5(4)}(2){3(4).4(4).5(4).6(3)}{3(4).4(8).5(6).6(9).8} topology, and MOF 2 manifests a 2D -> 3D interpenetrated porous solid featuring a (3,4)-connected layer lattice with a new {5.6(4).8}(2){5(2).6}(2){5(4).8(2)} topology. The results illustrate the presence of a N-donor co-ligand to identify the assembly of MOFs. The solid-state properties such as the thermal stability and magnetic properties have also been studied.