Photoreactivities of donor-acceptor crystals between 3,5-dinitrobenzoic acid and N-alkylcarbazoles

Yoshikatsu Ito, Sadayuki Asaoka, Koji Kokubo, Shigeru Ohba, Shigeru Fukushima

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


A variety of 1:1 charge-transfer (CT) crystals were prepared by using mainly dinitrobenzoic acids (as the acceptor) and carbazoles (as the donor). Most of the CT crystals prepared from 3,5-dinitrobenzoic acid (3) and a series of N-alkylcarbazoles (1a1h) underwent photoredox reactions initiated by the excited nitro group, leading to α-oxidation of N-alkyl groups (13 -15). The reactions were much more efficient in the solid state than in solution. These solid-state photoreactivities could be, on the whole, correlated with the C⋯O distances between the carbazole N-α-carbon atom and the nitro oxygen atoms nearby.

Original languageEnglish
Pages (from-to)125-134
Number of pages10
JournalMolecular Crystals and Liquid Crystals Science and Technology Section A: Molecular Crystals and Liquid Crystals
Publication statusPublished - 1998


  • 3,5-dinitrobenzoic acid
  • Charge-transfer crystals
  • Donor-acceptor crystals
  • N-alkylcarbazoles
  • Solid-state photoreactivity

ASJC Scopus subject areas

  • Condensed Matter Physics


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