著者

Takanori Suzuki Takuma Kuroda Hitomi Tamaoki Sho Higasa Ryo Katoono Kenshu Fujiwara Takanori Fukushima Hidetoshi Yamada

出版者

(社)日本化学会

雑誌

Chemistry Letters (ISSN:03667022)

巻号頁・発行日

vol.42, no.7, pp.706-708, 2013-07-05 (Released:2013-07-05)

参考文献数

29

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Upon oxidation of the title heterocycles with dimethylamino groups, elemental sulfur is extruded to form dicationic dyes, which regenerate the heterocycles by the reaction with Na2S. The electrolysis of the heterocycles induces a drastic change in UV–vis spectrum exhibiting several isosbestic points. The bay-region substituents enhance configurational stability, so the optically pure heterocycle can be obtained in terms of helicity of one-handedness, and its chromism is accompanied by a large chiroptical response as detected by CD spectroscopy.

著者

Takanori Suzuki Hitomi Tamaoki Ryo Katoono Kenshu Fujiwara Junji Ichikawa Takanori Fukushima

出版者

(社)日本化学会

雑誌

Chemistry Letters (ISSN:03667022)

巻号頁・発行日

vol.42, no.7, pp.703-705, 2013-07-05 (Released:2013-07-05)

参考文献数

24

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Octafluorobiphenyl-2,2′-diylbis(diarylmethylium) dye 2a2+ prepared from 1,2-dibromotetrafluorobenzene is interconvertible with colorless dihydrophenanthrene donor 1a. By the SNAr reactions of 1a with acetylides, π-extended analogues 1b and 1c were obtained. Their electrochromic behavior is accompanied by a drastic absorption change not only in the visible but also UV region, because the torsion angle of the biaryl unit is modified upon redox reactions.