WebNov 17, 2011 · Photochromism: Definition. ... The photochromism exhibited the ability to switch between colorless and blue. A fading process occurred when the film was exposed to ambient air or O2 in the dark ... WebAug 7, 2014 · Definition • Definition of Molecular PhotochromismReversible isomerization between two isomers having different absorption spectra, which is induced in at least one direction by light irradiation. A and B have an equal molecular weight but have different structures. A B hn Example (diarylethene in solution) hn’ orD UV light Vis. light.
Photochromics - an overview ScienceDirect Topics
Photochromism is the reversible transformation of a chemical species (photoswitch) between two forms by the absorption of electromagnetic radiation (photoisomerization), where the two forms have different absorption spectra. In plain language, this can be described as a reversible change of … See more Sunglasses One of the most famous reversible photochromic applications is color changing lenses for sunglasses. The largest limitation in using photochromic technology is that … See more Photochromism was discovered in the late 1880s, including work by Markwald, who studied the reversible change of color of 2,3,4,4-tetrachloronaphthalen-1(4H)-one in the solid state. He … See more Photochromic molecules can belong to various classes: triarylmethanes, stilbenes, azastilbenes, nitrones, fulgides, spiropyrans, naphthopyrans, … See more Photochromism does not have a rigorous definition, but is usually used to describe compounds that undergo a reversible photochemical reaction See more • Photosensitive glass • Hexaarylbiimidazole See more WebThe meaning of PHOTOCHROMIC is capable of changing color on exposure to radiant energy (such as light). How to use photochromic in a sentence. ... photochromism-ˌmiz … diamonds forever jewelry
Photochromism SpringerLink
WebPhotochromic Definition. Designating or of a material, as certain glass or film, which turns dark when exposed to light and returns to its normal transparency with the removal of the … WebFeb 25, 2011 · Photochromism is a part of photochemistry dealing with reversible photochemical reactions. Photochromism was first reported by Fritsche in 1867 [1], who observed that tetracene with air and light ... cisco phishing statistics