ChemInform Abstract: THE GROUND STATE AND ZERO-FIELD SPLITTING OF THE GADOLINIUM OXIDE (GDO) MOLECULE

1982 ◽  
Vol 13 (7) ◽  
Author(s):  
R. J. VAN ZEE ◽  
R. F. FERRANTE ◽  
K. J. ZERINGUE ◽  
W. JUN. WELTNER
Keyword(s):  
Ground State ◽  
Gadolinium Oxide ◽  
Zero Field ◽  
Zero Field Splitting ◽  
Field Splitting

Zero field splitting of the Mo3+ ground state in corundum

1981 ◽  
Vol 107 (2) ◽  
pp. K129-K132
Author(s):  
M. Baran ◽  
A. A. Mirzakhanyan ◽  
E. G. Sharoyan ◽  
H. Szymczak
Keyword(s):  
Ground State ◽  
Zero Field ◽  
Zero Field Splitting ◽  
Field Splitting

Zero-Field Splitting of the Ground State S Ion in Calcite Type Borates

1979 ◽  
pp. 295-295
Author(s):  
A. Chlystov ◽  
S. Lukin ◽  
V. Rudenko ◽  
V. Seleznev ◽  
G. Tsintsadze
Keyword(s):  
Ground State ◽  
Zero Field ◽  
Zero Field Splitting ◽  
Field Splitting

The ground state and zero‐field splitting of the GdO molecule

1981 ◽  
Vol 75 (11) ◽  
pp. 5297-5299 ◽  
Author(s):  
R. J. Van Zee ◽  
R. F. Ferrante ◽  
K. J. Zeringue ◽  
W. Weltner
Keyword(s):  
Ground State ◽  
Zero Field ◽  
Zero Field Splitting ◽  
Field Splitting

The zero-field splitting of the Mo3+ ground state in corundum

1979 ◽  
Vol 94 (2) ◽  
pp. K129-K131 ◽  
Author(s):  
K. N. Kocharyan ◽  
A. A. Mirzakhanyan ◽  
E. G. Sharoyan
Keyword(s):  
Ground State ◽  
Zero Field ◽  
Zero Field Splitting ◽  
Field Splitting

scholarly journals Design, Isolation, and Spectroscopic Analysis of a Tetravalent Terbium Complex

2019 ◽  
Author(s):  
Natalie Rice ◽  
Ivan Popov ◽  
Dominic Russo ◽  
John Bacsa ◽  
Enrique Batista ◽  
...  
Keyword(s):  
Ground State ◽  
Molecular Complexes ◽  
Lanthanide Ions ◽  
Ligand Field ◽  
Zero Field ◽  
High Symmetry ◽  
Zero Field Splitting ◽  
Terbium Complex ◽  
Field Splitting ◽  
Metal Ligand

Synthetic strategies to yield molecular complexes of high-valent lanthanides, other than the ubiquitous Ce<sup>4+</sup> ion, are exceptionally rare, and thorough, detailed characterization in these systems is limited by complex lifetime and reaction and isolation conditions. The synthesis of high-symmetry complexes in high purity with significant lifetimes in solution and solid-state are essential for determining the role of ligand-field splitting, multiconfigurational behavior, and covalency in governing the reactivity and physical properties of these potentially technologically transformative tetravalent ions. We report the synthesis and physical characterization of an <i>S</i><sub>4</sub> symmetric, four-coordinate tetravalent terbium complex, [Tb(NP(1,2-bis-<i><sup>t</sup></i>Bu-diamidoethane)(NEt<sub>2</sub>))<sub>4</sub>] (where Et is ethyl and <i>t</i>Bu is <i>tert</i>-butyl). The ligand field in this complex is weak and the metal-ligand bonds sufficiently covalent so that the tetravalent terbium ion is stable and accessible via a mild oxidant from the anionic, trivalent, terbium precursor, [(Et<sub>2</sub>O)K][Tb(NP(1,2-bis-<i><sup>t</sup></i>Bu-diamidoethane)(NEt<sub>2</sub>))<sub>4</sub>]. The significant stability of the tetravalent complex enables its thorough characterization. The step-wise development of the supporting ligand points to key ligand control elements for further extending the known tetravalent lanthanide ions in molecular complexes. Magnetic susceptibility, electron paramagnetic resonance (EPR) spectroscopy, X-ray absorption near-edge spectroscopy (XAS), and density functional theory studies indicate a <i>4f<sup>7</sup></i> ground state for [Tb(NP(1,2-bis-<i><sup>t</sup></i>Bu-diamidoethane)(NEt<sub>2</sub>))<sub>4</sub>] with considerable zero-field splitting: demonstrating that magnetic, tetravalent lanthanide ions engage in covalent metal-ligand bonds. This result has significant implications for the use of tetravalent lanthanide ions in magnetic applications since the observed zero-field splitting is intermediate between that observed for the trivalent lanthanides and for the transition metals. The similarity of the multiconfigurational behavior in the ground state of [Tb(NP(1,2-bis-<i><sup>t</sup></i>Bu-diamidoethane)(NEt<sub>2</sub>))<sub>4</sub>] (measured by Tb L<sub>3</sub>-edge XAS) to that observed in TbO<sub>2</sub> implicates ligand control of multiconfigurational behavior as a key component of the stability of the complex.

scholarly journals Broadband electron paramagnetic resonance of a molecular spin triangle

2021 ◽  
Vol 23 (36) ◽  
pp. 20268-20274
Author(s):  
Jérôme Robert ◽  
Philippe Turek ◽  
Matthieu Bailleul ◽  
Athanassios K. Boudalis
Keyword(s):  
Electron Paramagnetic Resonance ◽  
Ground State ◽  
Zero Field ◽  
Zero Field Splitting ◽  
Field Sweep ◽  
Paramagnetic Resonance ◽  
Field Splitting ◽  
Molecular Spin ◽  
Electron Paramagnetic

A new broadband EPR spectrometer capable of measuring in frequency- and field-sweep modes is described and its functionality is demonstrated on a ferromagnetic Cu3II triangle demonstrating a moderate zero-field splitting of its quartet ground state.

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