On the photophysical properties of new luminol derivatives and their synthetic phthalimide precursors

Raúl Pérez-Ruiz, Robert Fichtler, Yrene Diaz Miara, Matthieu Nicoul, Dominik Schaniel, Helfried Neumann, Matthias Beller, Dirk Blunk, Axel G. Griesbeck, Axel Jacobi Von Wangelin

Research output: Contribution to journalArticlepeer-review

10 Scopus citations

Abstract

The photophysical properties of a series of structurally related 4-aminophthalimides and the corresponding 5-aminophthalic hydrazides (luminols) are reported. Absorption, steady-state, and time-resolved fluorescence spectra of luminols exhibited substitution, solvent, and pH dependence. Singlet lifetimes have been determined by time-resolved laser flash spectroscopy. UV spectra in gas phase and DMSO solution were calculated by TD-DFT which revealed the existence of two low-energy excited singlet states with strong pH-sensitivity.

Original languageEnglish
Pages (from-to)657-664
Number of pages8
JournalJournal of Fluorescence
Volume20
Issue number3
DOIs
StatePublished - May 2010
Externally publishedYes

Keywords

  • Fluorescence
  • Luminols
  • PH dependence
  • Phthalimides
  • Singlet lifetime

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