Results 171 to 180 of about 4,883 (226)

Photochromic polypeptides

Journal of Polymer Science Part A-1: Polymer Chemistry, 1970
AbstractTwo photochromic polypeptides were synthesized by reaction of 1‐(4‐iodobutyl)‐3,3‐ dimethylindolindolino‐6′‐nitrobenzospiropyran with poly‐L‐tyrosine; their molar contents on photochromic units were 27.3 and 44.7%. The spectra of the photo‐induced merocyanines and their decoloration kinetics were compared with these of the monomeric model ...
P H, Vandewyer, G, Smets
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Multiple Anti-Counterfeiting Guarantees from a Simple Tetraphenylethylene Derivative – High-Contrasted and Multi-State Mechanochromism and Photochromism

Angewandte Chemie - International Edition, 2019
Herein the novel tetraphenylethylene (TPE) derivative 1 was designed with an integration of aggregation-induced emission (AIE), multi-state mechanochromism and self-recovery photochromism.
Zikai He, Ben Zhong Tang, Bing Shi Li
exaly   +2 more sources

Lightguiding in Photochromic Glasses

Applied Optics, 1974
Lightguiding in ion-exchanged photochromic glass layers is reported. The guides were formed by ion exchange of Ag(+) for Na(+) or by outdiffusion of F. Guide attenuation was less than 0.2 dB/cm in many cases. The attenuation in the guide was varied over a range of Deltaalpha = 30 dB/cm by illuminating the guide with (1) uv radiation to darken the guide
J D, Crow, N F, Borrelli, T P, Seward Iii, J, Chodak   +3 more
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Synthesis, Photochromism and Photoinduced Anisotropy of a New Photochromic Diarylethene

2009 Pacific-Asia Conference on Circuits, Communications and Systems, 2009
A new unsymmetrical photochromic diarylethene compound, 1-[2-methyl-5-(3-methoxylphenyl)-3-thienyl]-2-[2-methyl-5-(3-methylphenyl)-3-thienyl]perfluoro -cyclopentene (1a), was synthesized and its photochromism and photo-induced anisotropy were investigated.
Anyin Chen, Shouzhi Pu, Zhanggao Le, Gang Liu   +3 more
openaire   +1 more source

Photochromics

Physics Today, 1970
A GREEN MATERIAL MAY TURN BLUE; a pale blue material may turn purple and a white material may turn red as different colors of light shine upon them. This photochromic effect is a property of certain types of inorganic materials. Among those that have been studied are single crystals of calcium fluoride doped with rare-earth elements, and strontium ...
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Synthesis and Photochromism of Novel Phenylene-Linked Photochromic Bispyrans

Organic Letters, 2005
[reaction: see text] Phenylene-linked bisnaphthopyrans were synthesized in good yields via the one-pot reaction of bis-propargyl alcohols with naphthols. Temperature-dependent photochromism in 1,4-phenylene-linked bispyrans leads to up to 60 nm bathochromic shift between the colored species formed at room temperature and at -20 degrees C.
Zhao W, Carreira EM
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Structural observation of photochromism

Chemical Communications, 2006
The reversible formation of a long-lived, coloured F-centre has been observed in small structural changes delineated by neutron diffraction.
Armstrong, Jennifer A., Weller, Mark T.
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Photochromic glasses: Properties and applications

Journal of Materials Science, 1967
Photochromic materials are those which react reversibly to light. Photochromism is therefore distinguished from the familiar photographic processes, which, because of the chemical development of the image, are essentially irreversible. Many organic materials, and a few inorganic ones, show this phenomenon.
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Tunable Photochromism of Spirooxazine in the Solid State: A New Design Strategy Based on the Hypochromic Effect

Advanced Materials, 2023
Jie Han, Ying-Wei Yang, Bin Zhao
exaly  

PHOTOCHROMIC COMPOUND, PHOTOCHROMIC COMPOSITION, PHOTOCHROMIC ARTICLE, AND EYEGLASSES

2022
KAWAKAMI HIRONORI, MATSUE AOI, KOBAYASHI KEI   +2 more
openaire   +5 more sources