Fluorescence properties of amido-substituted 2,3-naphthalimides: Excited-state intramolecular proton transfer (ESIPT) fluorescence and responses to Ca2+ ions

Lei Wang, Mayu Fujii, Misa Namba, Minoru Yamaji, Hideki Okamoto

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

2,3-Naphthalimide derivatives incorporating trifluoroacetamido (3a) and methansulfonamido (3b) functionalities at the 1-position were prepared and their intramolecular excited state proton transfer (ESIPT) fluorescence and responses to metal ions were investigated. Compound 3a displayed normal fluorescence in the amide form in toluene and MeCN and no response to metal cations in the corresponding amidate ion form. In contrast, compound 3b gave off dual emission assignable to normal and ESIPT fluorescence. Additionally, the amidate form of compound 3b displayed off-on fluorescence response to Ca2+.

Original languageEnglish
Article number151189
JournalTetrahedron Letters
Volume60
Issue number43
DOIs
Publication statusPublished - Oct 24 2019

Keywords

  • Ca probe
  • ESIPT
  • Fluorescence
  • Naphthalimide

ASJC Scopus subject areas

  • Biochemistry
  • Drug Discovery
  • Organic Chemistry

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