On the Photophysical Properties of New Luminol Derivatives and their Synthetic Phthalimide Precursors |
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| Authors: | 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 |
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| Affiliation: | 1.Department of Chemistry,University of Cologne,K?ln,Germany;2.Department of Physics I,University of Cologne,K?ln,Germany;3.Leibniz-Institute of Catalysis,Rostock,Germany |
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| 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. |
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