20.500.12556/RUL-153051 Impact of counter anions on structural and magnetic properties of iron(III) meso-tetraphenylporphyrin tetrahydrofurane solvates Intensively researched iron meso-tetraphenylporphyrin (FeTPP) complexes are central to the functionalities of many biological systems while at the same time they possess intriguing magnetic properties. Here we report on the synthesis and structural characterization of FeTPP complexes with axial tetrahydrofuran (THF) ligand and different non-coordinating counter anions. Structurally, the most interesting feature of these complexes is the stretching of the distance between the iron(III) and the oxygen atom of the THF ligand for different counter anions. This parameter affects the magnetic anisotropy of FeTPP as studied here with magnetic susceptibility, χ$_m$, and X-band electron paramagnetic resonance (EPR). Both magnetic probes are consistent with the iron(III) in its high-field state S = 5/2. Simulations of temperature dependencies of χ$_m$ and EPR spectra show that the zero-field splitting magnetic anisotropy parameter D decreases with the tetragonal elongation of the hexa-coordinated iron(III) geometry, which is qualitatively discussed within the ligand field theory. magnetic materials X-ray diffraction electron paramagnetic resonance EPR magnetic properties true false true Angleški jezik Ni določen Članek v reviji 2023-12-15 09:49:10 2023-12-15 09:49:11 2023-12-16 03:49:04 0000-00-00 00:00:00 2023 0 0 10 str. Vol. 181, art. 111514 2023 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 538.9 0022-3697 10.1016/j.jpcs.2023.111514 156769539 1-s2.0-S0022369723003049-main.pdf 1-s2.0-S0022369723003049-main.pdf 1 2F68D600970BC9FCA1E063F6C26FA8E2 2f7605e3a1be4a4db70861a449e1cdcc93bb098af0e94560a50191a987b951df 16065e37-9b27-11ee-bebf-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=178844 https://www.sciencedirect.com/science/article/pii/S0022369723003049 0 f3980251-9b26-11ee-bebf-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=178843 Fakulteta za kemijo in kemijsko tehnologijo Fakulteta za gradbeništvo in geodezijo Fakulteta za farmacijo Fakulteta za matematiko in fiziko 0 0 0