12th International Symposium on Bioluminescence & Chemiluminescence

Symposium abstracts:

Chemically induced phosphorescence from manganese(II)

Hindson, Benjamin J.¹, Barnett, Neil W.¹, Jones, Philip², Smith, Trevor A.³

1. Centre for Chiral and Molecular Technologies, School of Biological and Chemical Sciences, Deakin University, Geelong, Victoria 3217, Australia

2. Department of Environmental Sciences, University of Plymouth, Drake Circus, Plymouth, PL4 8AA, UK

3. School of Chemistry, University of Melbourne, Parkville, Victoria 3010, Australia

Chemiluminescence was observed during the manganese(III), manganese(IV) and manganese(VII) oxidations of sodium borohydride in acidic aqueous solution. From the corrected chemiluminescence spectra, the wavelengths of maximum emission were 689 ± 5 nm and 734 ± 5 nm when the reactions were performed in either sodium hexametaphosphate or sodium dihydrogenorthosphosphate and orthophosphoric acid environments, respectively. The corrected phosphorescence spectrum of manganese(II) sulfate in a solution of sodium hexametaphosphate at 77 K, exhibited two peaks with maxima at 688 nm and 730 nm. The chemical and spectroscopic evidence strongly supports the postulation that the emission is an example of solution phase chemically induced phosphorescence of manganese(II). These results also confirm earlier predictions that the chemiluminescence from acidic potassium permanganate reactions originates from manganese(II)* .

This is a preprint of an article accepted for publication in Luminescence: Copyright 2001 John
Wiley & Sons, Ltd (Wiley website)