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Electronic Transitions in Transition Metal Compounds at High Pressure
Author(s) -
Drickamer H. G.
Publication year - 1974
Publication title -
angewandte chemie international edition in english
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 0570-0833
DOI - 10.1002/anie.197400391
Subject(s) - electronic structure , atomic electron transition , transition metal , chemical physics , chemistry , electron configuration , acceptor , molecular electronic transition , multiplicity (mathematics) , ground state , atomic orbital , reactivity (psychology) , metal , high pressure , ion , materials science , electron , atomic physics , condensed matter physics , computational chemistry , molecule , thermodynamics , organic chemistry , physics , catalysis , spectral line , mathematical analysis , pathology , quantum mechanics , medicine , astronomy , alternative medicine , mathematics
Very high pressure is becoming increasingly important for investigating electronic structure. The relative shift in energy of electronic orbitals which is commonly observed at high pressure can frequently lead to a new ground state for the system. These electronic transitions may result in changes in electrical, optical, or magnetic properties as well as changes in chemical reactivity. Electronic transitions in metals and insulator‐metal transitions have been widely studied by physicists. Recently, it has been found that electronic transitions in aromatic hydrocarbons and their electron donor‐acceptor complexes can induce chemical reactivity and lead to the formation of new classes of hydrocarbons. Electronic transitions in transition metal complexes may lead to changes in spin state; both increase and decrease in multiplicity with increasing pressure have been observed. In addition, it has been shown that Fe( III ) and Cu( II ) reduce at high pressure in a variety of compounds. The behavior of these transition metal ions is described in some detail in relation to the general area of high pressure and electronic structure.