Published April 1992 | Version v1
Journal article Metadata-only

Rapid spin-state interconversion in the bis-complex of tris-(1-pyrazolyl) methane with Fe(II) studied by Moessbauer spectroscopy

Creators

  • 1. Inst. of Physics, Medical Univ., Luebeck (Germany)
  • 2. Dept. of Chemistry, Odense Univ. (Denmark)

Description

Dynamic spin equilibrium is observed in a complex of the [Fe(II)-N6] type above room temperature. The Moessbauer lineshapes as function of temperature can be understood by means of the random-frequency-modulation model. Taking into accout the different Lamb-Moessbauer factors of the low- and high-spin state yields true populations of the two spin states. The transition rates follow rather well an Arrhenius law. With appropriate assumptions an activation energy ΔELH=18(1) kJmol-1 is deduced. (orig.)

Additional details

Publishing Information

Journal Title
Hyperfine Interactions
Journal Volume
70
Journal Issue
1-4
Series
Hyperfine Interact.
Journal Page Range
1083-1086
ISSN
0304-3843
CODEN
HYIND

Conference

Title
International conference on the applications of the Moessbauer effect (ICAME '91).
Dates
16-20 Sep 1991.
Place
Nanjing (China).

INIS

Country of Publication
Netherlands
Country of Input or Organization
Switzerland
INIS RN
23088885
Subject category
S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; S36: MATERIALS SCIENCE;
Resource subtype / Literary indicator
Conference
Descriptors DEI
ACTIVATION ENERGY; ARRHENIUS EQUATION; CROSS SECTIONS; HIGH SPIN STATES; IODINE COMPOUNDS; IRON COMPLEXES; MAGNETIC SUSCEPTIBILITY; METHANE; MOESSBAUER EFFECT; ORGANOMETALLIC COMPOUNDS; SPIN ORIENTATION; TEMPERATURE DEPENDENCE
Descriptors DEC
ALKANES; COMPLEXES; ENERGY; ENERGY LEVELS; HALOGEN COMPOUNDS; HYDROCARBONS; MAGNETIC PROPERTIES; ORGANIC COMPOUNDS; ORIENTATION; PHYSICAL PROPERTIES; TRANSITION ELEMENT COMPLEXES