What is it about?
The chemiluminescence (CL) efficiency is influenced by the viscosity of the solvent, however, intermolecular systems (where two chemical species interact) show low influence of solvent viscosity. Whereas, an intramolecular system (participation of only one molecule) shows significant influence of the emission quantum yields on solvent viscosity.
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Why is it important?
This work shows that the low efficiency of the intermolecular chemiluminescence systems is not due to the solvent cage escape of radical ion intermediates, giving additional evidence for the importance of steric effects for the chemiluminescence efficiency.
Perspectives
This work is part of our efforts to understand the exact mechanisms of organic chemiluminescence transformations and strategies to make them more efficient. We have learned here that increasing the solvent viscosity does not improve the efficiency of the studied intermolecular transformations, therefore, other medium parameters should be considered in future investigations.
Professor Wilhelm Josef Baader
Universidade de Sao Paulo
Read the Original
This page is a summary of: Solvent viscosity influence on the chemiexcitation efficiency of inter and intramolecular chemiluminescence systems, Photochemical & Photobiological Sciences, January 2015, Springer Science + Business Media,
DOI: 10.1039/c5pp00152h.
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