J-type aggregation of a simple merocyanine skeleton: Spectral features and structure of 4-amino-6-oxopyrimidine

Kenta Goto, Rieko Omae, Minoru Yamaji, Teruo Shinmyozu

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)

Abstract

The absorption and fluorescence spectral properties of 4-amino-6-oxopyrimidine (1), which has a simple streptopolymethine merocyanine skeleton, clearly showed that the molecule 1 formed the aggregate 1n, and showed an exciton band, appearing at an absorption of 350 nm due to the red-shifted HOMO-LUMO transition. Upon light irradiation of the exciton band, a fluorescence band at 398 nm (ΦFL = 0.10) was observed, and its decay lifetimes were determined. Based on these spectral features, the aggregated 1n was found to be formed by J-type aggregation. The molecular orientation 1 in the crystal was revealed as being both parallel π-π stacking and hydrogen bonding chains.

Original languageEnglish
Pages (from-to)92-96
Number of pages5
JournalJournal of Photochemistry and Photobiology A: Chemistry
Volume194
Issue number1
DOIs
Publication statusPublished - Feb 5 2008
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)
  • Physics and Astronomy(all)

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