We present joint anion photoelectron spectroscopy and theoretical studies for MnGe and MnGe. Experimental results show that MnGe and MnGe have vertical electron detachment energies of 2.58 ± 0.08 and 2.88 ± 0.08 eV, respectively. Both MnGe and MnGe have symmetric structures with a Mn atom attached to a pentagonal bipyramid MnGe. Both MnGe and MnGe have symmetric structures, which can be considered as two MnGe tetragonal bipyramids sharing a MnGeMn face. According to chemical bonding analyses, MnGe could be considered as a (Mn)(MnGe) complex. Theoretical calculations predict that the extension of MnGe to MnGe may be able to produce a new type of Mn-doped germanium nanostructure.
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http://dx.doi.org/10.1021/acs.inorgchem.2c03612 | DOI Listing |
Front Chem
July 2024
School of Physics and Electronic Science, Zunyi Normal University, Zunyi, China.
Dalton Trans
April 2024
Department of Chemistry, University of California, Berkeley, Berkeley, CA, USA.
The synthesis, thermolysis, and surface organometallic chemistry of thermolytic molecular precursors based on a new germanosilicate ligand platform, -OGe[OSi(OBu)], is described. Use of this ligand is demonstrated with preparation of complexes containing the first-row transition metals Cr, Mn, and Fe. The thermolysis and grafting behavior of the synthesized complexes, Fe{OGe[OSi(OBu)]} (FeGe), Mn{OGe[OSi(OBu)]}(THF) (MnGe) and Cr{OGe[OSi(OBu)]}(THF) (CrGe), was evaluated using a combination of thermogravimetric analysis; nuclear magnetic resonance (NMR), ultraviolet-visible (UV-Vis), and electron paramagnetic resonance (EPR) spectroscopies; and single-crystal X-ray diffraction (XRD).
View Article and Find Full Text PDFNanomaterials (Basel)
March 2024
Sandia National Laboratories, Albuquerque, NM 87185, USA.
Large size epitaxial thin films of ferromagnetic CoMnGe full Heusler alloy are grown over MgO(100) substrate by using pulsed laser deposition technique under optimized growth conditions. Metallic behavior is confirmed from the longitudinal resistivity-temperature data, while a minimum in the resistivity at ∼25 K is attributed to the disorder-induced weak localization effect. Importantly, a dominating intrinsic anomalous Hall conductivity value of ∼21 S cm against an overall anomalous Hall conductivity value of ∼36 S cm at the room temperature has been estimated for the epitaxial CoMnGe film.
View Article and Find Full Text PDFDalton Trans
October 2023
McMaster Analytical X-ray Diffraction Facility (MAX), McMaster University, 1280 Main St. West, Hamilton, Ontario, L8S 4M1, Canada.
Reactions of the ethylene hydride complex -[(dmpe)MnH(CH)] (1) with secondary hydrogermanes HGeR at 55-60 °C afforded the base-free terminal germylene hydride complexes -[(dmpe)MnH(GeR)] (R = Ph; 2a, R = Et; 2b). Room temperature reactions of 2a or 2b with an excess of the primary hydrogermanes HGeR' (R' = Ph or Bu) afforded -[(dmpe)MnH(GeHR')] (R' = Ph; 3a, R' = Bu; 3b) in rapid equilibrium with small amounts of 2a/b, as well as the digermyl hydride complex -[(dmpe)MnH(GeHR')] {R' = Ph (4a) or Bu (4b)} and the -hydrogermane germyl complex -[(dmpe)Mn(GeHR')(HGeHR')] {R' = Ph (5a) or Bu (5b)}. Pure 3b was isolated from the reaction of 2b with HGeBu, whereas 3a decomposed readily in solution in the absence of free HGePh, and a pure bulk sample was not obtained.
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