FE2-TEMPERATURE EPR STUDY( SPIN TRANSITION IN [FE(TRZ)(HTRZ)(2)](BF4)AS EVIDENCED BY A VARIABLE)

Authors
CANTIN C KLIAVA J SERVANT Y SOMMIER L KAHN O
Citation
C. Cantin et al., FE2-TEMPERATURE EPR STUDY( SPIN TRANSITION IN [FE(TRZ)(HTRZ)(2)](BF4)AS EVIDENCED BY A VARIABLE), Applied magnetic resonance, 12(1), 1997, pp. 81-86
Citations number
10
Categorie Soggetti
Spectroscopy,"Physics, Atomic, Molecular & Chemical
Journal title
Applied magnetic resonance → ACNP
ISSN journal
09379347
Volume
12
Issue
1
Year of publication
1997
Pages
81 - 86
Database
ISI
SICI code
0937-9347(1997)12:1<81:FESSTI>2.0.ZU;2-W
Abstract
The EPR of Fe3+ ions has been used for the first time to evidence a lo w-spin (S = 0) to high-spin (S = 2) transition of Fe2+ ions in an octa hedral ferrous complex [Fe(trz)(Htrz)(2)](BF4). The temperature depend ence of the intensity of the Fe3+ EPR line at g = 4.3 reveals a spin t ransition which occurs for the Fe2+ ions, with hysteresis. The transit ion temperatures are T-c up arrow = 374 K in the warming mode and T-c down arrow = 345 K in the cooling mode. The analysis of the EPR spectr al data indicates the presence of a structural phase transition accomp anying the spin transition.