Thermally activated magnetic interactions in a one-dimensional semiconductor. Structural, charge-transport, and magnetic studies of (Cu(tmp)) sub 2 (ReO sub 4 )

Journal Article · Wed Feb 20 00:00:00 EST 1991 · Inorganic Chemistry; (United States)

DOI:https://doi.org/10.1021/ic00004a036· OSTI ID:6070561

McGhee, E M; Godfrey, M R; Hoffman, B M; Ibers, J A ^[1]

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1. Northwestern Univ., Evanston, IL (United States)

Electrochemical oxidation of (5,10,15,20-tetramethylporphyrinato)copper(II), Cu(tmp), in the presence of the perrhenate ion affords the new molecular conductor (Cu(tmp)){sub 2}(ReO{sub 4}). The compound is composed of partially oxidized (+1/2) Cu(tmp) cations stacked metal-over-metal and surrounded by chains of ReO{sub 4} anions. Single-crystal, room-temperature conductivity along the needle (crystallographic c) axis averages 40 {Omega}{sup {minus}1} cm{sup {minus}1}, lower than the values previously reported for Ni(tmp)-based conductors. The conductivity is thermally activated and may be fit to an expression that describes a semiconductor with temperature-dependent carrier mobility. Magnetic studies show that the local Cu(II) moments and the itinerant {pi}-carrier electrons participate in strong spin exchange. This intramolecular Cu-{pi} coupling is shown to mediate Cu-Cu spin exchange along the linear chains of Cu(II) ions found in this compound. These magnetic interactions depend on the thermally activate carrier concentration. The angular variation of the line width indicates that exchange is highly one-dimensional. The crystal structure of the compound is reported.

• OSTI ID: 6070561
• Journal Information: Inorganic Chemistry; (United States), Vol. 30:4; ISSN 0020-1669
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
36 MATERIALS SCIENCE
COPPER COMPLEXES
CRYSTAL STRUCTURE
ELECTRIC CONDUCTIVITY
MAGNETIC PROPERTIES
ORGANOMETALLIC COMPOUNDS
EXPERIMENTAL DATA
OXIDATION
PORPHYRINS
RHENIUM OXIDES
SEMICONDUCTOR DEVICES
CARBOXYLIC ACIDS
CHALCOGENIDES
CHEMICAL REACTIONS
COMPLEXES
DATA
ELECTRICAL PROPERTIES
HETEROCYCLIC ACIDS
HETEROCYCLIC COMPOUNDS
INFORMATION
NUMERICAL DATA
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
REFRACTORY METAL COMPOUNDS
RHENIUM COMPOUNDS
TRANSITION ELEMENT COMPLEXES
TRANSITION ELEMENT COMPOUNDS
400201* - Chemical & Physicochemical Properties
360606 - Other Materials- Physical Properties- (1992-)
360602 - Other Materials- Structure & Phase Studies