Английская Википедия:(Z)-Stilbene
(Z)-Stilbene is a diarylethene, that is, a hydrocarbon consisting of a cis ethene double bond substituted with a phenyl group on both carbon atoms of the double bond. The name stilbene was derived from the Greek word Шаблон:Lang, which means shining.
Isomers
Stilbene exists as two possible isomers known as (E)-stilbene and (Z)-stilbene. (Z)-Stilbene is sterically hindered and less stable because the steric interactions force the aromatic rings 43° out-of-plane and prevent conjugation.[1] (Z)-Stilbene has a melting point of Шаблон:Convert, while (E)-stilbene melts around Шаблон:Convert, illustrating that the two compounds are quite different.
Uses
- Stilbene is used in manufacture of dyes and optical brighteners, and also as a phosphor and a scintillator.
- Stilbene is one of the gain mediums used in dye lasers.
Properties
- Stilbene will typically have the chemistry of a diarylethene, a conjugated alkene.
- Stilbene can undergo photoisomerization under the influence of UV light.
- Stilbene can undergo stilbene photocyclization, an intramolecular reaction.
- (Z)-Stilbene can undergo electrocyclic reactions.
Natural occurrence
Many stilbene derivatives (stilbenoids) are present naturally in plants. An example is resveratrol and its cousin, pterostilbene.
References
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- Английская Википедия
- Luminescence
- Fluorescent dyes
- Phosphors and scintillators
- Laser gain media
- Stilbenoids
- Phenyl compounds
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