Tautomerism and dual fluorescence in 9-substituted n-propyl- and methoxyethyl-porphycenes

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Resum

Dual fluorescence is described and characterized for several 9-substituted porphycenes. Using both spectroscopic and computational studies, the phenomenon is related to the differential stabilization of the two trans tautomers in the excited state. The electronic nature of the 9-substituents affects both the energy and the lifetime of the two tautomers as well as their interconversion. The results are consistent with a two-step model for excited-state tautomerization that involves the population of an upper excited state, tentatively assigned to a cis species, which in turn provides an efficient non-radiative pathway to the ground state.

Idioma originalAnglès
Pàgines (de-a)633-640
Nombre de pàgines8
RevistaJournal of Porphyrins and Phthalocyanines
Volum16
Número5-6
DOIs
Estat de la publicacióPublicada - 2012

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