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.

著者

Hiroyoshi Sugino Hidetoshi Kawai Kenshu Fujiwara Takanori Suzuki

出版者

(社)日本化学会

雑誌

Chemistry Letters (ISSN:03667022)

巻号頁・発行日

vol.41, no.1, pp.79-81, 2012-01-05 (Released:2011-12-30)

参考文献数

23

被引用文献数

8

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Condensation reactions of macrocyclic diamines 1 and cyclohexane-1,4-dicarbaldehydes 2 with the substituents at 1,4-positions gave a series of macrocage molecules that can be considered molecular gyroscopes. The gyro-rotational behavior of the cyclohexane rotor is largely affected by the degree of steric requirement of the substituents, and isolation of syn-isomer suggests stepwise motion in the macrocages attached with bulky substituents on the rotor.