Synthesis, crystal structure, magnetic and vibrational properties of formamidine-templated Co and Fe formates
Aneta Ciupa , Mirosław Mączka , Anna Gągor , Adam Pikul , Edyta Kucharska , Jerzy Hanuza , Adam Sieradzki
AbstractTwo novel Co and Fe formates, [NH2-CH-NH2][Co(HCOO)(3)] and [NH2-CH-NH2][Fe(HCOO)(3)], containing formamidinium cations [FMD+, NH2-CH+-NH2] have been prepared under solvothermal conditions. Crystal structure determination shows that these compounds are isostructural and crystallize in the orthorhombic structure, space group Pnna. The FMD+ cations, located in the cavities of the metal formate framework, form extensive N-H center dot center dot center dot O hydrogen bonding with the framework and they are ordered at room temperature. The divalent cations have octahedral geometry and are bridged by the formate ions in an anti-anti mode of coordination. A magnetic study revealed that these compounds are weak ferromagnets, with the critical temperatures of 13.0 K (Co) and 17.0 K (Fe). Based on IR and Raman data, an assignment of the observed modes has been proposed.
|Journal series||Polyhedron, ISSN 0277-5387, (A 30 pkt)|
|Publication size in sheets||0.4|
|Keywords in English||Metal organic framework, Structure, Magnetization, Infrared, Raman|
|ASJC Classification||; ;|
|Publication indicators||: 2015 = 0.793; : 2015 = 2.108 (2) - 2015=1.973 (5)|
|Citation count*||31 (2020-07-11)|
* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or Perish system.