EPR EVIDENCE OF THE PARAMAGNETISM OF A LONG-LIVING METASTABLE EXCITED-STATE OF A SODIUM-NITROPRUSSIDE SINGLE-CRYSTAL

Authors
TRITTGOC J PISLEWSKI N HOFFMANN SK
Citation
J. Trittgoc et al., EPR EVIDENCE OF THE PARAMAGNETISM OF A LONG-LIVING METASTABLE EXCITED-STATE OF A SODIUM-NITROPRUSSIDE SINGLE-CRYSTAL, Chemical physics letters, 268(5-6), 1997, pp. 471-474
Citations number
25
Categorie Soggetti
Physics, Atomic, Molecular & Chemical
Journal title
Chemical physics letters → ACNP
ISSN journal
00092614
Volume
268
Issue
5-6
Year of publication
1997
Pages
471 - 474
Database
ISI
SICI code
0009-2614(1997)268:5-6<471:EEOTPO>2.0.ZU;2-N
Abstract
An EPR signal characteristic of low-spin Fe(III) (S = 1/2) was observe d in a Na-2[Fe(CN)(5)NO]. 2H(2)O single crystal after about 12 h of co ntinuous irradiation with blue-green light at 77 K. This is a result o f charge transfers within the nitroprusside anions forming a long-livi ng metastable excited state. Then a slow 6 h evolution of the EPR spec trum is observed, which seems to be due to a continuous deformation of the [Fe(CN)(5)NO](2-) structure. This deformation forms when thermal equilibrium in the multilevel orbital system and in the crystal lattic e is established.