Intense White Molecular Fluorescence from Naphthoxazole-Quinoline Derivatives

Renzo P. Zanocco, Silvana Valdebenito, Yasser Gidi, Gerald Zapata-Torres, Else Lemp, Santi Nonell, Antonio L. Zanocco

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Resum

Naphthoxazole derivatives are small heterocyclic compounds endowed with outstanding fluorescence properties. In this work, we report a detailed study of the intense white light fluorescence observed in naphthoxazole-quinoline dyads in solvent mixtures including at least a strong hydrogen bonding solvent. The same phenomenon was also studied in inclusion complexes naphthoxazole derivatives—sulfonated-βCD either in aqueous solution as well as in solid phase. A novel mechanism of white molecular fluorescence generation based on solvent-to-fluorophore proton transfer facilitated by ground state hydrogen bonding was characterized. The emission combines both, a blue charge transfer fluorescence emitted by the locally excited singlet state along with a red-shifted emission from a proton transfer complex.

Idioma originalAnglès
Pàgines (de-a)1092-1099
Nombre de pàgines8
RevistaPhotochemistry and Photobiology
Volum94
Número6
DOIs
Estat de la publicacióPublicada - 1 de nov. 2018

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