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The Effect of Ammonia Ions on the Absorption and Fluorescence of an Oxazine Dye

Authors :
J. F. Giuliani
T. W. Barrett
Source :
Spectroscopy Letters. 16:555-563
Publication Year :
1983
Publisher :
Informa UK Limited, 1983.

Abstract

The addition of ammonium hydroxide to a weakly acidic oxazine perchlorate dye produces a color change by means of a deprotonation mechanism in which the hydroxyl radical abstracts a loosely bound proton, leaving the positively charged ammonium cation to counter balance the perchlorate anion. This reaction produces significant absorption and fluorescence band shifts which can be accounted for by a semi-classical oscillator model predicting two dichroic electronic band systems associated with this dye. Peculiar wavelength excitation dependent fluorescence band shifts are attributed to overlapping triplet states simultaneously excited.

Details

ISSN :
15322289 and 00387010
Volume :
16
Database :
OpenAIRE
Journal :
Spectroscopy Letters
Accession number :
edsair.doi...........861683c49927c4192c9ca6723a33de9e
Full Text :
https://doi.org/10.1080/00387018308062375