Electronic absorption spectrum of Ba(MnO4)2·3H2O/Ba(ClO4)2·3H2O
Authors:
L. W. Johnson and S. P. McGlynn
Affiliation:
Coates Chemical Laboratories, The Louisiana State University, Baton Rouge, Louisiana 70803, USA
Abstract:
Polarized absorption spectra of Ba(MnO4)2·3H2O/Ba(ClO4)2·3H2O mixed single crystals are reported at 4.2°K. Previous 1T2 → 1A1 assignments for the 5200 Å and 3000 Å absorption bands of MnO4− are substantiated; further support is provided for the 1T1 → 1A1 assignment of the 3600 Å absorption band of MnO4−. The site-splitting of the 5200 Å 1T2 state is E(1E)−E(1A) ≈ −150 cm−1; that of the 3000 Å 1T2 state is E(1E)−E(1A) ≈ 300 cm−1. A significant e vibronic intensity component is observed in the 5200 Å 1T2 state.