210490-50-9Relevant academic research and scientific papers
Photosalient Effect of a Diarylethene with a Perfluorocyclohexene Ring
Hatano, Eri,Morimoto, Masakazu,Hyodo, Kengo,Yasuda, Nobuhiro,Yokojima, Satoshi,Nakamura, Shinichiro,Uchida, Kingo
, p. 12680 - 12683 (2016)
Crystals of a diarylethene with a perfluorocyclohexene ring exhibit a remarkable photosalient effect upon UV light irradiation that is attributed to the structural changes that occur when going from open- to closed-ring isomers in the crystalline state, together with the existence of two conformers with different photoconversions compared with those of a perfluorocyclopentene derivative. Our current results give a design principle for molecular structures so as to achieve the photosalient effect for photochromic crystals.
Photoreversible current ON/OFF switching by the photoinduced bending of gold-coated diarylethene crystals
Kitagawa, Daichi,Kobatake, Seiya
, p. 4421 - 4424 (2015)
Gold-coated diarylethene crystals exhibited photoreversible bending upon alternating irradiation with ultraviolet (UV) and visible light. The bending behavior can be well explained by the extended bimetal model, which we propose here. Moreover, we have de
Photosalient Effect of Diarylethene Crystals of Thiazoyl and Thienyl Derivatives
Nakagawa, Yuma,Morimoto, Masakazu,Yasuda, Nobuhiro,Hyodo, Kengo,Yokojima, Satoshi,Nakamura, Shinichiro,Uchida, Kingo
, 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
Synthetic protocol for diarylethenes through Suzuki-Miyaura coupling
Hiroto, Satoru,Suzuki, Katsuya,Kamiya, Hiroki,Shinokubo, Hiroshi
, p. 7149 - 7151 (2011/09/12)
The synthesis of a variety of diarylethenes through the Suzuki-Miyaura coupling reaction of 1,2-dichlorohexafluorocyclopentene with arylboronic acids and esters has been developed. Thiophenes with various substituents such as cyano and ester functionalities can be incorporated.
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.
Thermally irreversible photochromic systems. Reversible photocyclization of 1,2-bis(thiazolyl)perfluorocyclopentenes
Uchida, Kingo,Ishikawa, Takayuki,Takeshita, Michinori,Irie, Masahiro
, p. 6627 - 6638 (2007/10/03)
Diarylethenes having thiazole rings, 1,2-bis(thiazol-4'- yl)perfluorocyclopentenes and 1,2-bis(thiazol-5'-yl)perfluorocyclopentences, were synthesized. The binding positions of the thiazole rings to the perfluorocyclopentene moiety strongly affected the a
