On the photophysical properties of new luminol derivatives and their synthetic phthalimide precursors.
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.
Pérez-Ruiz
Raúl
R
Department of Chemistry, University of Cologne, Greinstr. 4, 50939 Köln, Germany.
Fichtler
Robert
R
Diaz Miara
Yrene
Y
Nicoul
Matthieu
M
Schaniel
Dominik
D
Neumann
Helfried
H
Beller
Matthias
M
Blunk
Dirk
D
Griesbeck
Axel G
AG
Jacobi von Wangelin
Axel
A