화학공학소재연구정보센터
Inorganic Chemistry, Vol.57, No.13, 7892-7903, 2018
Mn-III-Fe-III Heterometallic Compounds within Hydrogen-Bonded Supramolecular Networks Promoted by an [Fe(CN)(5)(CNH)](2-) Building Block: Structural and Magnetic Properties
The reaction of [Fe(CN)(6)](3-) and [Mn(acacen)](+) (H(2)acacen = N,N'-bis(acetylacetone)ethylenediamine) building units in the presence of supramolecular cations, [(F-Anil) (18-crown-6)](+) (F-Anil(+) = 3-fluoroanilinium) or [(Me-F-Anil)(18-crown-6)](+) (Me-F-Anil(+) = 3-fluoro-4-methylanilinium), affords two new bimetallic compounds, [(F-Anil)(18-crown-6)][Mn-(acacen)Fe(CN)(5)(CNH)]center dot MeOH (1) and [(Me-F-Anil)(18-crown-6)][Mn-(acacen)(MeOH)Fe(CN)(5)(CNH)]center dot MeOH (2), nrespectively. Compound 1 exhibits a one-dimensional topology, while compound 2 is a dinuclear discrete system due to the coordination of a MeOH molecule at the axial position of the [Mn(acacen)](-) unit. For both systems, the acidity of the corresponding supramolecular cation triggers Fe-III moiety as [Fe(CN)(5)(CNH)](2-). Moreover, the resulting -CNH ligand induces hydrogen bonding interactions connecting the chains for 1 or the molecules for 2 into higher dimensional supramolecular networks. Magnetic properties of compounds incorporating these [Fe(CN)5(CNH)](2-) building blocks were, for the first time, thoroughly investigated, indicating a three-dimensional antiferromagnetic order of single-chain magnets for 1 and an antiferromagnetically interacting S = 3/2 spin ground state for 2.