Fig. 1: Geometrical and electronic structure changes in NeoR. | Nature Communications

Fig. 1: Geometrical and electronic structure changes in NeoR.

From: Retinal chromophore charge delocalization and confinement explain the extreme photophysics of Neorhodopsin

Fig. 1: Geometrical and electronic structure changes in NeoR.The alternative text for this image may have been generated using AI.

a Schematic representation of the hypothetic S0 and S1 energy changes occurring along the S1 relaxation that involves the bond length alternation (BLA, quantified by the difference between the average of the double-bond lengths and the average of the single-bond lengths of the conjugated chain) and isomerization (α) coordinates. The rPSB resonance hybrids show a delocalized positive charge at the S0 and S1 energy minima corresponding to the Dark Adapted State (DA) and Fluorescent State (FS), respectively. The symbol “δ+“ gives a qualitative measure of the amount of positive charge located along the rPSB-conjugated chain. b Representation of the bond length alternation (BLA) mode and the torsion mode (α) along the C13=C14 double bond. BLAPSB is the -C14-C15 and C15-N bond lengths difference.

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