500004-36-4Relevant academic research and scientific papers
Photosalient Effect of Diarylethene Crystals of Thiazoyl and Thienyl Derivatives
Nakagawa, Yuma,Morimoto, Masakazu,Yasuda, Nobuhiro,Hyodo, Kengo,Yokojima, Satoshi,Nakamura, Shinichiro,Uchida, Kingo
supporting information, p. 7874 - 7880 (2019/05/15)
The photoresponse of diarylethene crystals is found to depend on the intensity of UV light, that is, photoinduced bending is switched to photosalient phenomena by increasing the light intensity. The change in the size of the crystal unit cell upon UV irra
Practical synthesis of photochromic diarylethenes in integrated flow microreactor systems
Asai, Tatsuro,Takata, Atsushi,Nagaki, Aiichiro,Yoshida, Jun-Ichi
experimental part, p. 339 - 350 (2012/06/30)
An effective method for the synthesis of photochromic diarylethenes through the generation of heteroaryllithiums and subsequent reaction with octafluorocyclopentene has been developed by using integrated flow microreactor systems. Reactions can be conducted without using cryogenic conditions by virtue of effective temperature and residence time control, although much lower temperatures (-1. Therefore, the present integrated flow microreactor method serves as a practical way of synthesizing various photochromic diarylethene derivatives. Too successful to be cool: An effective method for the synthesis of photochromic diarylethenes has been developed by using integrated flow microreactor systems. Reactions can be conducted without the need for cryogenic conditions by using these systems (see picture). The synthesis of unsymmetrical diarylethenes, which is difficult to achieve by using conventional macro batch systems, has also been accomplished. Copyright
Photochromic polymers bearing various diarylethene chromophores as the pendant: Synthesis, optical properties, and multicolor photochromism
Nishi, Hiroyasu,Namari, Tomoko,Kobatake, Seiya
supporting information; experimental part, p. 17249 - 17258 (2012/05/04)
Photochromic polymers with various diarylethene derivatives were synthesized by a conventional radical polymerization of styrene derivatives having diarylethene chromophores as the pendant. All the polymers exhibited reversible photochromism in the film a
LIGHT-ACTIVATED ACTUATOR ELEMENT
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Page/Page column 4, (2010/02/17)
Disclosed is light-driven actuator element characterized in that, inter alia, it can be reduced to micrometer size, is rapidly responsive, and reversibly changes to enable repeated use. The light-driven actuator element includes a crystal of diarylethene
Synthesis of photochromic diarylethenes using a microflow system
Ushiogi, Yousuke,Hase, Tomoyuki,Iinuma, Yoshiharu,Takata, Atsushi,Yoshida, Jun-Ichi
, p. 2947 - 2949 (2008/02/10)
An effective method for the synthesis of photochromic diarylethenes based on microflow systems has been developed, and the synthesis of unsymmetrical diarylethenes which is difficult to achieve using conventional macro batch systems, has been accomplished. The Royal Society of Chemistry.
Photochromism of Dithiazolylethenes Having Methoxy Groups at the Reaction Centers
Takami, Shizuka,Kawai, Tsuyoshi,Irie, Masahiro
, p. 3796 - 3800 (2007/10/03)
Photochromic dithiazolylethenes [1,2-bis(5-methoxy-2-phenylthiazol-4-yl)perfluorocyclopentene (1a) and (5-methoxy-2-phenylthiazol-4-yl)-2-(5-methyl-2-phenylthiazol-4-yl)perfluorocyclopentene (2a)] having methoxy substituents at the reaction centers were synthesized and their photochromic reactivity was compared with 1,2-bis(5-methyl-2-phenylthiazol-4-yl)perfluorocyclopentene (3a), which has methyl substituents at the reaction centers. All dithiazolylethene derivatives underwent reversible photocyclization reactions from the open-ring forms 1a, 2a, and 3a to the closed-ring forms 1b, 2b, and 3b, respectively. The photocyclization quantum yields of 1a and 2a were only slightly lower than that of 3a, while the photocycloreversion quantum yields of 1b and 2b dramatically decreased relative to that of 3b by factors of 100 and 10, respectively. Absorption maxima of dithiazolylethene derivatives 1b, 2b, and 3b showed a hypsochromic shift as much as 50-80 nm relative to that of dithienylethene derivatives. This is explained by the difference in the HOMO-LUMO band gap between the two systems.
