A heterometallic nanosized tube {Fe[(CN)₆]₂[Co(L_N3O2)]₃}_n and two of its lamellar polymorphous isomers

Abstract

Single crystals of three polymorphous compounds were synthesized started from two building blocks, [FeIJCN) 6 ] 3− and [CoIJL N 3 O 2 )] 2+ (L is a Schiff-base macrocyclic ligand derived from the condensation of 2,6-diacetylpyridine with 3,6-dioxaoctane-1,8diamine) using a crystallization condition control. All three compounds consist of electroneutral skeletons made up of Fe 6 Co 6 twelve-metal ring units, which is the smallest enclosed circle in their structures: 1 is comprised of 1D nanometer-diameter tubes possessing nanometer-sized tunnels (0.58 nm × 0.74 nm); 2 and 3 are based on piled-up 2D lamellar layers in the (6, 3) and (4, 4) networks, respectively. Magnetic studies indicate ferromagnetic interactions between cyanide-bridged cobaltIJII) and ironIJIII) in each compound. 7490 | CrystEngComm, 2015, 17, 7490-7495 This journal is

Magnetic anisotropy of transition metal and lanthanide ions in pentagonal bipyramidal geometry

“…13 2-D and 1-D hollow networks have been achieved with [Co(L4)(H 2 O) 2 ] 2+ and [Fe(CN) 6 ] 3− metallo-ligand. 96 Ferromagnetic Co–Fe interactions were found to take place but no SCM behavior was evidenced for the 1-D derivative. A chiral ligand derived from lactic acid hydrazide was used to impart chirality to 1-D K[{Co(H 2 L1 lact )}{Fe(CN) 6 }] ( lact stands for lactic acid derived hydrazide group).…”