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Photochromism - Wikipedia

Photochromism is the reversible transformation of a chemical species 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 colour upon exposure to light. 1 Applications 1.1 Sunglasses

Photochromism | ScienceDirect

Photochromism is simply defined as the light induced reversible change of colour. The field has developed rapidly during the past decade as a result of attempts to improve the established materials and to discover new devices for applications. As photochromism bridges molecular, supramolecular and solid state chemistry, as well as organic, inorganic and physical chemistry, such a treatment ...

Photochromism - an overview | ScienceDirect Topics

Photochromism is both of great basic interest and of high application potential. It brings together scientists from a variety of domains in chemistry, physics and engineering. It bridges molecular, supramolecular and solid state chemistry, as well as organic, inorganic and physical chemistry. It thus requires a multidisciplinary approach and a broad presentation. The first publication, in 1990 ...

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Photochromism definition: the reversible transformation of something's colour due to exposure to electromagnetic... | Meaning, pronunciation, translations and examples

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Novel Strategy for Designing Photochromic Ceramic ...

In addition, the photochromism-induced upconversion emission modification was obtained in the PbWO4:Yb3+, Er3+ ceramic, realizing the effective and nondestructive reading out of optical information. The cyclic experiment demonstrated a good reproducibility of both photochromism and upconversion emission modification, exhibiting the potential ...

Photochromism and Fluorescence Switch of Furan-Containing ...

It is extremely challenging to design photocontrolled molecular switches with absorption and fluorescence dual-mode outputs that are suited for a solid surface and interface. Herein, we report a group of furan-containing tetraarylethene derivatives with unique photophysical behavior of aggregation-induced emission (AIE) and distinct photochemical reaction-triggered photochromic behaviors by ...

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Taking Photochromism beyond Visible: Direct One‐Photon NIR Photoswitches Operating in the Biological Window. Kristin Klaue. Department of Chemistry & IRIS Adlershof, Humboldt-Universitat zu Berlin, Brook-Taylor-Strasse 2, 12489 Berlin, Germany . Search for more papers by this author. Yves Garmshausen. Department of Chemistry & IRIS Adlershof, Humboldt-Universitat zu Berlin, Brook-Taylor ...

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Phototropy (or Photochromism) | Chemical Reviews

Photochromism and electrochromism in amorphous transition metal oxide films. Accounts of Chemical Research 1978, 11 (4) , 170-176. DOI: 10.1021/ar50124a008. Albert. Padwa. Photochemistry of the carbon-nitrogen double bond. Chemical Reviews 1977, 77 (1) , 37-68. DOI: 10.1021/cr60305a004.

Photochromic lens - Wikipedia

A photochromic lens is an optical lens that darkens on exposure to light of sufficiently high frequency, most commonly ultraviolet (UV) radiation. In the absence of activating light the lenses return to their clear state. Photochromic lenses may be made of glass, polycarbonate, or another plastic.They are principally used in eyeglasses that are dark in bright sunlight, but clear in low ambient ...

Photochromism: Molecules and Systems - Google Books

Photochromism is simply defined as the light induced reversible change of colour. The field has developed rapidly during the past decade as a result of attempts to improve the established materials and to discover new devices for applications.As photochromism bridges molecular, supramolecular and solid state chemistry, as well as organic, inorganic and physical chemistry, such a treatment ...

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Photochromism (October 1990 edition) | Open Library

Photochromism Molecules and Systems (Studies in Organic Chemistry) by Henri Bouas-Laurent, Heinz Durr. 0 Ratings 0 Want to read; 0 Currently reading; 0 Have read; This edition published in October 1990 by Elsevier Publishing Company Written in English — 1068 pages This edition doesn't have a description yet. Can you add one ...

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New Frontiers in Photochromism | Masahiro Irie | Springer

Photochromism is the reversible phototransformation of a chemical species between two forms having different absorption spectra. During the phototransformation not only the absorption spectra but also various physicochemical properties change, such as the refractive index, dielectric constant, oxidation/reduction potential, and geometrical structure.

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You will understand this better after reading about the photochromic properties or chemical elements that causes photochromism. First, let me take you through a quick history of photochromic technology. 1.2 Background information about photochromic technology. Photochromism is a phenomenon that was discovered in the late 1880s by Markwald. Markwald called the process phototropy until the 1950s ...

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Photochromism is defined as a reversible transformation of a chemical species between two isomers upon photoirradiation. Although vast numbers of photochromic molecules have been so far reported, photochromic molecules which exhibit thermally irreversible photochromic reactivity are limited to a few examples. The thermal irreversibility is an indispensable property for the application of ...

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Tunable inorganic nodes and modifiable organic linkers enable designable functionality to come to fruition in new-type porous hybrid materials, namely metal–organic frameworks (MOFs). By using viologen-functionalized m-benzenedicarboxylate as an organic linker, a terbium-organic framework embedded with asymmetric viologen species has been constructed. The reversible photochromism from bright ...

Photochromism - an overview | ScienceDirect Topics

Photochromism in TiO 2 and in the alkaline earth titanates is associated with the presence of iron impurity. Fe 3 ions enter the TiO 2 structure substitutionally for Ti 4+ ions, each pair of Fe 3+ ions being compensated for by one O = vacancy. Some of the Fe 3+ ions occupy sites adjacent to the vacancies forming Fe 3+ centers. Iron-doped rutile is colorless or pale yellow and irradiation with ...

Photochromism

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Photochromic | Definition of Photochromic by Merriam-Webster

Photochromic definition is - capable of changing color on exposure to radiant energy (such as light). How to use photochromic in a sentence.

Photochromism

Download Citation | On Feb 1, 2011, N. Sekar published Photochromism | Find, read and cite all the research you need on ResearchGate

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Photochromism into nanosystems: towards lighting up the ...

The integration of photochromism into these nanosystems has endowed the resultant nanostructures or advanced materials with intriguing photoresponsive behaviors and more sophisticated functions. In this Review, we provide an account of the recent advancements in reversible photocontrol of the structures and functions of photochromic nanosystems and their applications. The important design ...

ORGANIC PHOTOCHROMISM - University of Pennsylvania

Organic photochromism (IUPAC Technical Report) Abstract: This technical report is a general introduction to organic photo-chromism. The definition of photochromism (PC) is given together with that of words with the ending “chromism”, such as thermo-, electro-, piezo-, and tri-bochromism. Important concepts such as two-photon, gated, dual-mode PC and chirochromism are illustrated. The ...

Photochromism - AbeBooks

Great reading/study copy. May have highlights and/or notes. Ships Fast! Satisfaction Guaranteed!. Seller Inventory # mon0000657167. More information about this seller | Contact this seller 1. Chromism: Complexometric Indicators, PH Indicators, Thermochromism, Crystal Violet, Photochromism, Malachite Green, Sunset Yellow Fcf (Paperback) Source Wikipedia. Published by Books LLC, Wiki Series ...

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Read Online PDF (3 MB) Get e-Alerts. Supporting Info (1) » Supporting Information ... Herein, we developed an efficient molecular design for realizing red or NIR-light-responsive negative photochromism based on binaphthyl-bridged imidazole dimers. The introduction of electron-donating substituents shows the red shift of the absorption band at the visible-light region because of the ...

Photochromics - an overview | ScienceDirect Topics

Tungsten oxide photochromism sensitivity is usually limited by its bandgap energy of 3.17 eV, corresponding to the near-UV range. For an efficient use of solar radiation or laser, which covers the entire wavelength range, it is important to extend the coloration response to the visible light region. This is possible by the insertion of a small amount of cations in the crystallographic ...

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The evolution of spiropyran: fundamentals and progress of ...

Although quenching of photochromism in the solid state can be put to use for reversible activation of spiropyran features upon wetting and drying, 35 overcoming this fundamental challenge to photochromes in general opens up many alternative opportunities in materials science. Switching functions have been shown to be restricted in thin films, monolayers and microstructures incorporating the ...

What is Photochromic Smart Glass? | Smart Glass World

A Brief History of Photochromism. Photochromism was first discovered in 1867 by Fritsche, but the term was not coined until 1950 by Yehuda Hirschberg of the Weizmann Institute of Science. It derives from the Greek words ‘phos’ (meaning light) and ‘chroma’ (meaning colour). The IUPAC defines photochromism as the “reversible transformation of a chemical species between two forms by the ...

Photochromism: Molecules and Systems - 1st Edition

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