Related Experiment Video
Updated: May 13, 2026

LipidUNet-Machine Learning-Based Method of Characterization and Quantification of Lipid Deposits Using iPSC-Derived Retinal Pigment Epithelium
Published on: July 28, 2023
Nonadiabatic photodynamics of a retinal model in polar and nonpolar environment
Matthias Ruckenbauer1, Mario Barbatti, Thomas Müller
1Institute for Theoretical Chemistry, University of Vienna, Währingerstraße 17, 1090 Vienna, Austria.
Abstract:
The nonadiabatic photodynamics of the all-trans-2,4-pentadiene-iminium cation (protonated Schiff base 3, PSB3) and the all-trans-3-methyl-2,4-pentadiene-iminium cation (MePSB3) were investigated in the gas phase and in polar (aqueous) and nonpolar (n-hexane) solutions by means of surface hopping using a multireference configuration-interaction (MRCI) quantum mechanical/molecular mechanics (QM/MM) level. Spectra, lifetimes for radiationless deactivation to the ground state, and structural and electronic parameters are compared. A strong influence of the polar solvent on the location of the crossing seam, in particular in the bond length alternation (BLA) coordinate, is found. Additionally, inclusion of the polar solvent changes the orientation of the intersection cone from sloped in the gas phase to peaked, thus enhancing considerably its efficiency for deactivation of the molecular system to the ground state. These factors cause, especially for MePSB3, a substantial decrease in the lifetime of the excited state despite the steric inhibition by the solvent.
More Related Videos
08:18Methodology for Studying Interactions of Vitamin A Membrane Receptors and Opsin Protein with their Ligands in Generating the Retinylidene Protein
Published on: October 4, 2024
06:41Optimizing the Setup and Conditions for Ex Vivo Electroretinogram to Study Retina Function in Small and Large Eyes
Published on: June 27, 2022
Related Concept Videos
Photoreceptors and Visual Pathways
Properties of Enantiomers and Optical Activity
The Retina
Photochemical Electrocyclic Reactions: Stereochemistry
Selection Rules: Photochemical Activation
Measuring Reaction Rates