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Reversible photochromic molecules with solid-state fluorescence are of great value and perspective in various surface-involved practical applications. Herein, we propose a general strategy to design reversible photochromic molecules with solid-state fluorescence by introducing photoactive thienyl and benzoth Journal of Materials Chemistry C HOT Papers

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Design, synthesis and study of a photochromic α,ω-diene: ... Design, synthesis and study of a photochromic α,ω-diene: toward new classes of photoswitchable polymers W. Joo and C. W. Bielawski, Org. Biomol. Chem., 2019, 17, 2486 DOI: 10.1039/C9OB00049F If you are not the ...

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Therefore, it is an urgent need to find a suitable approach to design inorganic photochromic materials. Here, the photochromic PbWO4:Yb3+, Er3+ ceramic was designed with the help of valence state change of W6+ → W5+ and Pb2+ → Pb4+. Upon the 532 nm laser stimulation, the photochromism of the PbWO4:Yb3+, Er3+ ceramic was obtained based on the Pb2+ + hν (532 nm) → Pb4+ + 2e– and W6+ + e ...

Analysis of Application of New Photochromic Materials in ...

New smart materials have taken the lead position in modern design, photochromic materials with base of polymer gradually step into the range of new decorative materials in design of kindergarten, abundant color is the intuitional demonstration to attract children, however, if the color doesn’t change at all for a long term, children will be bored in both aesthetics and vision, such new ...

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Photochromic lenses were originally developed to protect the eyes from bright sunlight, but they offer a new benefit: protecting the eyes from the harmful blue light of electronic devices. Light rays on the blue end of the light spectrum have shorter wavelengths and more energy. In and of itself, blue light is natural and can even be healthy when consumed properly. However, our computer ...

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Photochromie – Wikipedia

Unter Dual-Modus-Photochromie versteht man Systeme, die durch mehr als einen externen Stimulus beeinflusst werden können. Huck et al. stellten 1995 einen chirooptischen molekularen Schalter vor, der es erlaubt, den photochemisch eingestellten Zustand chemisch durch Zurverfügungstellung von Protonen zu sichern, da die protonierten Spezies nicht mehr photoaktiv sind.

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 ...

Photochromics - an overview | ScienceDirect Topics

The photochromic ophthalmic lenses are manufactured using several technologies, namely, production of organic glass containing spirooxazines or chromenes by thermal or photo-polymerization, the introduction of a photochromic compound into the polymeric glass surface by diffusion, and the deposition of a polymer layer on the lens surface by spin-coating and triplexing of the photochromic film ...

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The synthesis of newly designed photochromic dithienylethene-containing ethynylthiophene and ethynylthieno[3,2-b]thiophene has been described, and their incorporation as versatile ligands into the platinum(II) phosphine system was demonstrated. All platinum(II) complexes have been successfully characterized by 1H and 31P NMR spectroscopies, positive fast atom bombardment (FAB) mass ...

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Design and Synthesis of a New Class of Photochromic Diarylethene‐Containing Dithieno[3,2‐b:2′,3′‐d]pyrroles and Their Switchable Luminescence Properties. Hok‐Lai Wong. Centre for Carbon‐Rich Molecular and Nano‐Scale Metal‐Based Materials Research, Department of Chemistry and HKU‐CAS Joint Laboratory of New Materials, The University of Hong Kong, Pokfulam Road, Hong Kong (P ...

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Transitions reinvents photochromic system in new lens design

The new lens design – available across seven lens colours – features a reinvented photochromic system and comes six years after the launch of the previous Transitions Signature VII lenses Transitions Optical Asia Pacific general manager Mr Stuart Cannon said the research shows glasses wearers and eyecare professionals want it all in a photochromic lens.

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Photochromism - Wikipedia

Since photochromic chromophores are dyes, and operate according to well-known reactions, their molecular engineering to fine-tune their properties can be achieved relatively easily using known design models, quantum mechanics calculations, and experimentation. In particular, the tuning of absorbance bands to particular parts of the spectrum and the engineering of thermal stability have ...

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Compared with the widely explored nonphotochromic polypyridine‐derivative as electron acceptors (EAs), our work provides a new EA model for the design of hybrid photochromic materials based on the ligand‐to‐ligand ET mechanism. A multiple anti‐counterfeiting application based on 1 and 2 was investigated.

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