Solid-state Chemistry Of Early Transition Metal- Oxides Containing D0 And D1 Cations

Content Provider	Indian Institute of Science (IISc)
Author	Bhuvaneshand, Nattamai Sp Gopalakrishnan, Jagannatha
Copyright Year	1997
Abstract	This paper presents a brief survey of the structures and properties of early transition-metal oxides containing d0 and d1–d0 electronic configurations. The metal–oxygen (MO6) octahedron, which is the essential structure building unit of these materials, exhibits a characteristic out-of-centre distortion for the d0 configuration in many instances, the degree of distortion increasing with decreasing HOMO–LUMO gap. Several characteristic properties of d0 oxides, which include low-dimensional structures (that give rise to intercalation, ion-exchange and acidity), ferroelectricity and non-linear optical response, arise from the out-of-centre distortion of d0 MO6 octahedra. Oxides containing d1–d0 electronic configurations exhibit an equally impressive array of electronic properties that owe their origin to the nature of d states near the Fermi level. While three-dimensional (3-D) oxides containing 5d and 4d electrons exhibit itinerant electron properties, 3d1 oxides, especially with low-dimensional (low-D) structures, display localized electron magnetism and semiconduction. Low-dimensional oxides containing 4d electrons, typified by molybdenum bronzes and Mo4O11, exhibit charge-density-wave (CDW)-driven electronic instabilities arising from electron– phonon interactions.
File Format	PDF
Journal	PeerReviewed
Language	English
Publisher	The Royal Society
Publisher Date	1997-01-01
Access Restriction	Authorized
Subject Keyword	Solid State & Structural Chemistry Unit
Content Type	Text
Resource Type	Article