Photophysics of lumichrome on cellulose

Marek Sikorski, Ewa Sikorska, Igor V. Khmelinskii, Rafael Gonzalez-Moreno, Jose L. Bourdelande, Aleksander Siemiarczuk

Research output: Contribution to journalArticleResearchpeer-review

14 Citations (Scopus)

Abstract

Lumichrome samples were prepared by depositing lumichrome on cellulose from methanol solutions. Diffuse reflectance absorption bands at 354 and 388 nm (shoulder) and the fluorescence band at 460 nm similar to those observed in polar solvents were attributed to a π → π * transition. The emission decay has a complex kinetics similar to that found in alloxazines, suggesting at least three emitting species with the respective lifetimes of about 0.95, 1.4 and 2.5 ns. Diffuse reflectance laser flash photolysis experiments provided the decay kinetics of the triplet state with the lifetime on the microsecond time scale and of the longer-lived semi-reduced radical absorbing in the 500-600 nm range with 0.24 ms lifetime. © 2003 Elsevier Science B.V.All rights reserved.
Original languageEnglish
Pages (from-to)267-271
JournalJournal of Photochemistry and Photobiology A: Chemistry
Volume156
Issue number1-3
DOIs
Publication statusPublished - 20 Mar 2003

Keywords

  • Cellulose
  • Lumichrome
  • Photophysics

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