EPR evidence of the paramagnetism of a long-living metastable excited state of a sodium nitroprusside single crystal

An EPR signal characteristic of low-spin Fe(III) ( S = 1 2 ) was observed in a Na 2[Fe(CN) 5NO] · 2H 2O single crystal after about 12 h of continuous irradiation with blue-green light at 77 K. This is a result of charge transfers within the nitroprusside anions forming a long-living metastable excit...

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Bibliographic Details
Published in:Chemical physics letters 1997-04, Vol.268 (5), p.471-474
Main Authors: Tritt-Goc, Jadwiga, Piślewski, Narcyz, Hoffmann, Stanisław K.
Format: Article
Language:English
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Summary:An EPR signal characteristic of low-spin Fe(III) ( S = 1 2 ) was observed in a Na 2[Fe(CN) 5NO] · 2H 2O single crystal after about 12 h of continuous irradiation with blue-green light at 77 K. This is a result of charge transfers within the nitroprusside anions forming a long-living metastable excited state. Then a slow 6 h evolution of the EPR spectrum is observed, which seems to be due to a continuous deformation of the [Fe(CN) 5NO] 2− structure. This deformation forms when thermal equilibrium in the multilevel orbital system and in the crystal lattice is established.
ISSN:0009-2614
1873-4448
DOI:10.1016/S0009-2614(97)00217-0