Emission from the stable Blatter radical
Date
2017Author
Karecla, G.Papagiorgis, Panagiotis
Panagi, N.





ISSN
1144-0546Source
New Journal of ChemistryVolume
41Issue
16Pages
8604-8613Google Scholar check
Metadata
Show full item recordAbstract
1,3-Diaryl-1,4-dihydro-1,2,4-benzotriazin-4-yls are air stable organic radicals which have been exploited for their interesting magnetic properties. Herein, we present the optical properties of the "parent" radical namely 1,3-diphenyl-1,4-dihydro-1,2,4-benzotriazin-4-yl (aka "the Blatter radical"), which possesses absorption bands that span the UV and visible spectrum that lead to broadband emission across the same spectral region. As shown in our experiments, the emission originates from excited electronic states of the radical, with, however, low quantum yield. Emission across the visible is also observed from thin films of the radical when inserted into PMMA matrices. As radical concentration within the polymer matrix is increased, systematic modifications in the spectral and temporal characteristics of the fluorescence indicate the formation of radical ground state aggregates. © 2017 The Royal Society of Chemistry and the Centre National de la Recherche Scientifique.