DIARYLETHENE Meaning and
Definition
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Diarylethene is a term used in organic chemistry to describe a class of compounds that exhibit unique and versatile photochemical properties. Specifically, it refers to a derivative of ethene (a simple hydrocarbon with a carbon-carbon double bond) in which two aryl groups are attached to the carbons involved in the double bond. This results in a molecule with a diarylethene backbone.
Diarylethenes are notable for their ability to undergo reversible photoisomerization, in which they can switch between two isomeric forms upon exposure to light. Typically, the isomers are distinguished by their differing absorption spectra, such that one form absorbs light while the other does not. This phenomenon is commonly referred to as "photochromism." Importantly, diarylethenes can switch back and forth between these two forms multiple times without significant degradation or loss of functionality.
The reversible photoisomerization of diarylethenes has found applications in various fields, including molecular switches, optical memory devices, and photolithography. The ability to control and manipulate these compounds' optical properties using light makes them valuable tools in nanotechnology and materials science.
In summary, diarylethenes are a class of organic compounds characterized by a diarylethene backbone. These molecules are capable of undergoing reversible photoisomerization, making them useful in the development of light-responsive materials and devices.
Etymology of DIARYLETHENE
The word "diarylethene" is derived from the combination of two terms: "diaryl" and "ethene".
The prefix "di-" in chemistry refers to a molecule containing two identical functional groups or molecules. In this case, it represents that the compound features two identical aryl groups.
"Aryl" refers to a type of organic compound that contains an aromatic ring, such as a phenyl group. These groups are derived from benzene or other aromatic hydrocarbons.
"Ethene" refers to the chemical name of ethylene, which is an unsaturated hydrocarbon with the formula C2H4. This term signifies the presence of a double bond between the carbon atoms.
Combining these terms, "diarylethene" describes a compound that consists of two aryl groups connected by an ethene moiety.
