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An observation concerning electronically excited retinal.

J Simons1

  • 1Chemistry Department, The University of Utah, Salt Lake City, Utah 84112.

Proceedings of the National Academy of Sciences of the United States of America
|August 1, 1977
PubMed
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Highly polar excited electronic states in retinal molecules may act as electron transfer agents. This potential oxidation capability suggests a new role for these excited states in chemical reactions.

Area of Science:

  • Photochemistry
  • Biophysical Chemistry
  • Molecular Dynamics

Background:

  • Mathies and Stryer observed highly polar excited electronic states in various retinal isomers and derivatives.
  • These states are crucial in understanding the photochemistry of vision and related biological processes.

Purpose of the Study:

  • To propose and investigate the potential of highly polar excited electronic states in retinal molecules to act as electron transfer agents.
  • To explore the oxidative capabilities of these excited states.

Main Methods:

  • Combines experimental evidence with crude model calculations.
  • Analysis of electronic states in all-trans-retinal, its unprotonated Schiff base, a salt of the protonated Schiff base, and 11-cis-retinal.

Main Results:

Related Experiment Videos

  • The existence of highly polar excited electronic states suggests a potential for significant molecular oxidation.
  • Evidence supports the hypothesis that these excited states can facilitate electron transfer to surrounding molecules.

Conclusions:

  • Highly polar excited electronic states of retinal derivatives may function as electron transfer agents.
  • This electron transfer capability could play a role in the photochemical mechanisms involving these molecules.