photoisomerization

It is still under discussion which excited state plays a direct role in the series of the photoisomerization behavior.

However, the word "photoisomerization" usually indicates a reversible process.

Stilbene can undergo photoisomerization under the influence of UV light.

The large geometry change associated with azobenzene photoisomerization has also been used to control protein activity with light.

The visual sense: the opsins use a photoisomerization reaction to translate electromagnetic radiation into cellular signals.

For example, photoisomerization behaviors of some complexes can be switched by oxidation and reduction of their metal parts.

Both reversible and irreversible photoisomerization reactions exist.

Photoexcitation plays role in photoisomerization.

Photoisomerization of rhodopsin, animation.

Exposed to UV, ecamsule undergoes reversible photoisomerization, followed by photoexcitation.

In chemistry, photoisomerization is molecular behavior in which structural change between isomers is caused by photoexcitation.

Note that the photoisomerization of maleic acid to fumaric acid with bromine is also bimolecular.

The photoisomerization induces a conformational change in the opsin protein, causing the activation of the phototransduction cascade.

The driving force behind the metal ion SCO in this photochemical transformation is cis-trans photoisomerization.

Examples of photochemical organic reactions are electrocyclic reactions, photoisomerization and Norrish reactions.

The archaeal-type rhodopsins of Chlamydomonas contain an all-trans retinylidene chromatophore which undergoes photoisomerization to a 13-cis isomer.

OPN and its isomer ONP can interconvert by photoisomerization.

One of the most intriguing properties of azobenzene (and derivatives) is the photoisomerization of trans and cis isomers.

Some other compounds can be changed in their luminescence behavior, magnetic interaction of metal sites, or stability of metal-to-ligand coordination by photoisomerization of their photochromic parts.

The photoisomerization dynamics has been investigated with time-resolved IR spectroscopy and UV/Vis spectroscopy.

After photoisomerization of the retinal molecule, Asp85 becomes a proton acceptor of the donor proton from the retinal molecule.

Photoisomerization behavior can be roughly categorized into several classes: trans (or E) and cis (or Z) conversion, and open ring and closed ring transition.

(E,E)-COD was first synthesized by Whitesides and Cope in 1969 by photoisomerization of the cis compound.

A second photoisomerization converts (P,P) cis 3 into (M,M) trans 4, again with accompanying formation of sterically unfavorable equatorial methyl groups.

Upon photoisomerization by a photon the cis-retinal is converted to trans-retinal causing activation of rhodopsin which ultimately leads to depolarization of the neuron thereby enabling visual perception.