By the same authors

From the same journal

Picosecond deactivation of azo dye excited states in solution and in cellulose

Research output: Contribution to journalArticle

Author(s)

  • Laurence C. Abbott
  • Stephen N. Batchelor
  • Lisinka Jansen
  • John Oakes
  • John R. Lindsay Smith
  • John N. Moore

Department/unit(s)

Publication details

JournalJOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
DatePublished - 5 Feb 2011
Issue number1
Volume218
Number of pages6
Pages (from-to)11-16
Original languageEnglish

Abstract

Ultrafast time-resolved UV-visible absorption spectroscopy has been used to study four model azo dyes and five commercial azo dyes. All of the dyes have been found to show strong bleaching of their ground-state absorption bands on photoexcitation, with recovery lifetimes of 1-5 ps in aqueous solution that are attributed to rapid and efficient non-radiative decay; two commercial azo dyes deposited in cellophane have been found to show an additional longer-lived component with a lifetime of > 50 ps that is attributed to the effects of intermolecular interactions with the cellulosic environment. (C) 2011 Elsevier B.V. All rights reserved.

    Research areas

  • Azo dye, Picosecond, Time-resolved UV-visible spectroscopy, Cellulose, Cellophane, VISIBLE ABSORPTION-SPECTROSCOPY, ALPHA-HYDROXYALKYL RADICALS, QUANTITATIVE RATE CONSTANTS, LASER FLASH-PHOTOLYSIS, TRANS-AZOBENZENE, ORANGE-II, AQUEOUS-SOLUTION, PULSE-RADIOLYSIS, SPECTRAL CHARACTERIZATION, OXIDIZED FORMS

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