Electron absorption spectrum of cobalt (II)-doped trisphenanthrolinezinc nitrate dihydrate

Abstract

The electron absorption spectrum of cobalt(II)-doped trisphenanthrolinezinc nitrate dihydrate has been observed at room temperature and at 77 ?K. Broad bands appear at 10,750 and 22,000 cm-1 which are assigned to the 4T1g(F) ?? 4T2g(F) and the 4T1g(F) ?? 4T1g(P) transitions respectively. A broad weak band occurs near 19,000 cm-1 but at 77 ?K this band is resolved into a series of narrower bands. These bands are assigned to 2G transitions. The relationship between the spectrum of cobalt(II) trisphenanthrolinezinc nitrate dihydrate and the solution spectra of cobalt(II) in ammonia and ethylenediamine is discussed.