The Solvatofluorochromism of 2,4,6‐Triarylpyrimidine Derivatives

• DOI: 10.1111/php.12982
• Publication Date: 2018-07-09T06:48:39Z
• Authors: José Rodríguez‐Ag...; Matías Vidal; Camila Pastenes; Carolina Aliaga; Marcos Caroli Rez...; Moisés Domínguez
• Keywords: 01 natural sciences; 0104 chemical sciences

AbstractSeven 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.