Five-membered rings as diazo components in optical data storage devices: An ab initio investigation of the lowest singlet excitation energies

P.-O. Åstrand, P. Sommer-Larsen, Søren Hvilsted, P.S. Ramanujam, K.L. Bak, S.P.A. Sauer

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

The two lowest singlet excitation energies of 18 azo dyes have been studied by ab initio quantum-chemical methods within the second-order polarization propagator approximation (SOPPA). Various combinations of five-membered rings (furan, thiophene, pyrrole, oxazole, thiazole, and imidazole) have been investigated as diazo components for a potential use in optical das storage materials. It is found that the diazo compounds with two heterocyclic five-membered rings have pi --> pi* excitation energies corresponding to laser wavelengths in the region 450-500 nm whereas one five-membered ring and a phenyl group as diazo components results in wavelengths in the region 400-335 nm. (C) 2000 Published by Elsevier Science B.V.
Original languageEnglish
JournalChemical Physics Letters
Volume325
Issue number1-3
Pages (from-to)115-119
ISSN0009-2614
DOIs
Publication statusPublished - 2000

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