|
|||||
|
|
Two new Fe(II) spin crossover complexes with tetrazol-1-yl-cycloalkane ligands |
|
| Authors: | Nader Hassan Frank Kubel Azzedine Bousseksou Roman Bo?a |
| Institution: | a Institute of Applied Synthetic Chemistry, Vienna University of Technology, Getreidemarkt 9/163-AC, A-1060 Vienna, Austria b Institute for Chemical Technologies and Analytics, Vienna University of Technology, Getreidemarkt 9/164-SC, A-1060 Vienna, Austria c Laboratoire de Chimie de Coordination, LCC-CNRS UPR8241, 205 route de Narbonne, F-31077 Toulouse, France d Institute of Inorganic Chemistry, Technology and Materials, Slovak University of Technology (FCHPT), 812 37 Bratislava, Slovakia |
| Abstract: | Two new 1-(tetrazol-1-yl)cycloalkanes Cntz] with n = 5 and 6 were synthesised as ligands for iron(II) spin crossover complexes. Just recently, the Fe(C3tz)6](BF4)2 showed that the rigid cyclopropyl-substituent of the tetrazole yielded a rather abrupt and complete spin transition at T½ ≈ 190 K 1]. Aiming for a deeper insight into the factors governing the spin transition behavior such as abruptness and spin transition temperature we synthesized the two new homologous complexes Fe(C5tz)6](BF4)2 and Fe(C6tz)6](BF4)2 which were characterized by XRPD, magnetic susceptibility measurements, DSC, 57Fe-Mössbauer, UV-Vis-NIR and MIR spectroscopy. The magnetic and structural properties of both Fe(Cntz)6](BF4)2 with n = 5 and 6 are also compared with the Fe(C3tz)6](BF4)2 and its structural peculiarities are discussed. |
| Keywords: | Iron(II) Tetrazole Spin crossover Magnetic measurements Vibrational spectroscopy |
| 本文献已被 ScienceDirect 等数据库收录！ | |