The Solvatofluorochromism of 2,4,6-Triarylpyrimidine Derivatives.
Photochem Photobiol
; 94(6): 1100-1108, 2018 11.
Article
in En
| MEDLINE
| ID: mdl-29984405
ABSTRACT
Seven new 2,4,6-triarylpyrimidines were synthesized and their solvatofluorochromism investigated in 12 solvents and in an aqueous micellar solution of reduced Triton X-100. A multiparametric analysis of their emission band showed that the solvent dipolarity and basicity were mainly responsible for their solvatofluorochromism, which arose from an internal charge-transfer from a donor fragment to the pyrimidine acceptor, confirmed by theoretical calculations. In the micellar system, quenching of their fluorescence by addition of derivatives of 2,2,6,6-tetramethylpiperidinoxyl (TEMPO) radical was investigated and the results were consistent with the spectral changes brought about by the micro-heterogeneous system.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Language:
En
Journal:
Photochem Photobiol
Year:
2018
Document type:
Article
Affiliation country:
Chile