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High-spin to low-spin relaxation kinetics in the [Fe(TRIM)2]Cl2 complex.
- Source :
-
Physical chemistry chemical physics : PCCP [Phys Chem Chem Phys] 2005 Aug 07; Vol. 7 (15), pp. 2909-14. Date of Electronic Publication: 2005 Jul 05. - Publication Year :
- 2005
-
Abstract
- A quasi-quantitative photo-induced low-spin (LS)-->high-spin (HS) conversion of FeII ions has been observed in the [Fe(TRIM)2]Cl2 complex by irradiating the sample with blue light (488 nm) at 10 K. The time dependence of the HS-->LS relaxation has been studied between 10 K and 44 K by means of magnetic susceptibility measurements. These relaxation curves could be satisfactorily fitted by mono-exponential decays including tunnelling effect except for temperatures below 30 K. The introduction of a distribution of vibrational frequencies into this model improved significantly the fits in the low-temperature range and gave a good agreement with the experimental data in the whole temperature range suggesting a multi-rate relaxation process in this complex.
Details
- Language :
- English
- ISSN :
- 1463-9076
- Volume :
- 7
- Issue :
- 15
- Database :
- MEDLINE
- Journal :
- Physical chemistry chemical physics : PCCP
- Publication Type :
- Academic Journal
- Accession number :
- 16189610
- Full Text :
- https://doi.org/10.1039/b504614a