0000000001313915
AUTHOR
Joshua Telser
Dinuclear manganese(iii) complexes with bioinspired coordination and variable linkers showing weak exchange effects: a synthetic, structural, spectroscopic and computation study
Three dimanganese(iii) complexes have been synthesised and fully characterised by standard spectroscopic methods and spectroelectrochemistry. Each MnIII ion is chelated by a salen type ligand (H2L), but there is variation in the bridging group: LMn(OOCCH[double bond, length as m-dash]CHCOO)MnL, LMn(OOCC6H4COO)MnL, and LMn(OOCC6H4C6H4COO)MnL. X-ray diffraction revealed an axial compression of each six-coordinate high-spin d4 MnIII ion, which is a Jahn-Teller-active ion. Temperature dependent magnetic susceptibility and variable temperature-variable field (VTVH) magnetisation measurements, as well as high-frequency and -field EPR (HFEPR) spectroscopy were used to accurately describe the magne…
A five-coordinate manganese(iii) complex of a salen type ligand with a positive axial anisotropy parameter D.
A new high-spin d4 roughly trigonal–bipyramidal (TBP) manganese(III) complex with a salen type ligand (H2L), namely MnL(NCS)·0.4H2O, has been synthesised and characterised by elemental analysis, ESI mass spectrometry, IR and UV-vis spectroscopy, and spectroelectrochemistry. X-ray diffraction analysis revealed an axial compression of the approximate TBP. Temperature dependent magnetic susceptibility and variable-temperature variable-field (VTVH) magnetisation measurements, as well as high-frequency and -field EPR (HFEPR) spectroscopy, were used to accurately describe the magnetic properties of this complex and, in particular, determine the spin Hamiltonian parameters: g-values and the zero-f…
.Single-Ion Magnetic Behaviour in an Iron(III) Porphyrin Complex: A Dichotomy Between High Spin and 5/2-3/2 Spin Admixture
International audience; A mononuclear iron(III) porphyrin compound exhibiting unexpectedly slow magnetic relaxation, which is a characteristic of single-ion magnet behaviour, is reported. This behaviour originates from the close proximity (approximate to 550 cm(-1)) of the intermediate-spinS=3/2 excited states to the high-spinS=5/2 ground state. More quantitatively, although the ground state is mostlyS=5/2, a spin-admixture model evidences a sizable contribution (approximate to 15 %) ofS=3/2 to the ground state, which as a consequence experiences large and positive axial anisotropy (D=+19.2 cm(-1)). Frequency-domain EPR spectroscopy allowed them(S)= |+/- 1/2⟩->|+/- 3/2&Rig…
CCDC 1872265: Experimental Crystal Structure Determination
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CCDC 1875357: Experimental Crystal Structure Determination
Related Article: Sergiu Shova, Angelica Vlad, Maria Cazacu, J. Krzystek, Andrew Ozarowski, Michal Malček, Lukas Bucinsky, Peter Rapta, Joan Cano, Joshua Telser, Vladimir B. Arion|2019|Dalton Trans.|48|5909|doi:10.1039/C8DT04596H
CCDC 1515780: Experimental Crystal Structure Determination
Related Article: Sergiu Shova, Angelica Vlad, Maria Cazacu, J. Krzystek, Lukas Bucinsky, Martin Breza, Denisa Darvasiová, Peter Rapta, Joan Cano, Joshua Telser, Vladimir B. Arion|2017|Dalton Trans.|46|11817|doi:10.1039/C7DT01809F
CCDC 1875359: Experimental Crystal Structure Determination
Related Article: Sergiu Shova, Angelica Vlad, Maria Cazacu, J. Krzystek, Andrew Ozarowski, Michal Malček, Lukas Bucinsky, Peter Rapta, Joan Cano, Joshua Telser, Vladimir B. Arion|2019|Dalton Trans.|48|5909|doi:10.1039/C8DT04596H
CCDC 1875358: Experimental Crystal Structure Determination
Related Article: Sergiu Shova, Angelica Vlad, Maria Cazacu, J. Krzystek, Andrew Ozarowski, Michal Malček, Lukas Bucinsky, Peter Rapta, Joan Cano, Joshua Telser, Vladimir B. Arion|2019|Dalton Trans.|48|5909|doi:10.1039/C8DT04596H