Premium
Possibility of Dielectric Material: Magnetic Resonance Study of Oxo‐Bridged Dinuclear Ruthenium Mixed‐Valence Complex
Author(s) -
Nakamura Toshikazu,
Asada Mizue,
Yoshida Masaki,
Kondo Mio,
Masaoka Shigeyuki
Publication year - 2018
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201802617
Subject(s) - ruthenium , valence (chemistry) , electron paramagnetic resonance , chemistry , spectral line , crystallography , relaxation (psychology) , condensed matter physics , nuclear magnetic resonance , ruthenium oxide , nmr spectra database , spin–lattice relaxation , nuclear quadrupole resonance , physics , psychology , social psychology , biochemistry , organic chemistry , astronomy , catalysis
Solid‐state broad line 1 H‐NMR (nuclear magnetic resonance) and ESR (electron spin resonance) were performed for an oxo‐bridged dinuclear ruthenium [RuORu] 5+ (Ru 3.5+ ORu 3.5+ ) mixed‐valence complex. The 1 H‐NMR spin‐lattice relaxation rate T 1 −1 was significantly enhanced, to below 100 K with a peak at approximately 33 K. The T 1 −1 peak temperature was frequency‐independent, indicating that this anomaly is a possible phase transition. Below approximately 40 K, an abrupt decrease of 1 H‐NMR spin‐spin relaxation time T 2 provides evidence of the appearance of inequivalent 1 H‐sites (sudden decrease in symmetry). ESR spectra suddenly disappeared above 35 K. The electronic properties and possible charge ordering (Ru 3+ ORu 4+ ) states in this mixed‐valence compound are discussed from a microscopic point of view.
Accelerating Research
Robert Robinson Avenue,
Oxford Science Park, Oxford
OX4 4GP, United Kingdom
Address
John Eccles HouseRobert Robinson Avenue,
Oxford Science Park, Oxford
OX4 4GP, United Kingdom