Synthesis and spectroscopy of coumarin derivatives for saxitoxin detection!

Jhony Orbulescu, Péter Kele, András Kotschy, Roger M. Leblanc

Research output: Contribution to journalArticlepeer-review

8 Scopus citations


This paper focuses on the examination of the Photoinduced Electron Transfer (PET) and Internal Charge Transfer (ICT) for two coumarin derivatives, namely 7-methoxycoumarin-4-methyl-1-aza-18-crown-6 and di(7-methoxycoumarin-4-methyl)-1,10-diaza-18-crown-6. The spectroscopic properties were investigated by UV-Vis and fluorescence spectroscopies. It was found that a dual mechanism explains the fluorescence enhancement and blue shift in the presence of a cationic species, namely saxitoxin. The ICT was elucidated by the polarity effect of methanol on the fluorescence of di(7-methoxycoumarin-4-methyl)-1,10-diaza-18-crown-6.

Original languageEnglish (US)
Pages (from-to)3084-3088
Number of pages5
JournalJournal of Materials Chemistry
Issue number30
StatePublished - Aug 14 2005

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Chemistry


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