- 著者
- Kim Yuna Frigoli Michel Vanthuyne Nicolas Tamaoki Nobuyuki
- 出版者
- The Royal Society of Chemistry
- 雑誌
- Chemical Communications (ISSN:13597345)
- 巻号頁・発行日
- vol.53, no.1, pp.200-203, 2017-01-04
- 被引用文献数
- 29
The first photoresponsive cholesteric liquid crystal comprising a photoisomerizable helical naphthopyran derivative dopant and a nematic liquid crystal is reported. An unprecedented helical twisting power switching ratio of over 90% allowed us to demonstrate multi-cycle rotational motion of micro-objects by UV light irradiation.
- 著者
- Kumara L. S. R. Sakata Osami Kohara Shinji Yang Anli Song Chulho Kusada Kohei Kobayashi Hirokazu Kitagawa Hiroshi
- 出版者
- The Royal Society of Chemistry
- 雑誌
- Physical chemistry chemical physics : PCCP (ISSN:14639084)
- 巻号頁・発行日
- 2016-10-27
- 被引用文献数
- 39
Ruナノ粒子の構造と触媒活性との関連を見いだす : 局所構造, 平均構造の数値化で実現 機械学習用データを集積し新材料の創製に貢献. 京都大学プレスリリース. 2016-11-01.
1 0 0 0 OA Direct arylation polycondensation for the synthesis of bithiophene-based alternating copolymers
- 著者
- Kuwabara Junpei Nohara Yuta Choi Seong Jib Fujinami Yohei Lu Wei Yoshimura Ken Oguma Jun Suenobu Katsuhiro Kanbara Takaki
- 出版者
- The Royal Society of Chemistry
- 雑誌
- Polymer Chemistry (ISSN:17599954)
- 巻号頁・発行日
- vol.4, no.4, pp.947-953, 2013-02
- 被引用文献数
- 106 26
Direct arylation polycondensation reactions using a simple catalytic system gave eight kinds of bithiophene-based alternating copolymers. The conditions for the reactions of 3,3′,4,4′-tetramethylbithiophene with dibromoarylenes were optimized to obtain high-molecular-weight polymers without formation of cross-linked structures. In the reaction of a dibromoarylene containing a reactive C–H bond, a short reaction time (1.5 h) was suitable for preventing side reactions. In contrast, a long reaction time (6 h) gave high-molecular-weight polymers from dibromoarylene monomers without a reactive C–H bond. This polycondensation reaction enables the synthesis of polymers containing dye structures such as diketopyrrolopyrrole and isoindigo, which are applicable as materials for polymer solar cells.
1 0 0 0 OA Synthesis of 4,4′-dinonyl-2,2′-bithiazole-based copolymers via Pd-catalyzed direct C–H arylation
- 著者
- Lu Wei Kuwabara Junpei Kanbara Takaki
- 出版者
- The Royal Society of Chemistry
- 雑誌
- Polymer Chemistry (ISSN:17599954)
- 巻号頁・発行日
- vol.3, no.12, pp.3217-3219, 2012-08
- 被引用文献数
- 61 21
Direct arylation polycondensation of a bithiazole derivative with dibromoarylenes gave the corresponding bithiazole-based copolymers using the phosphine-free catalytic system in a short reaction time.
- 著者
- Ishizuka Tomoya Sankar Muniappan Yamada Yusuke Fukuzumi Shunichi Kojima Takahiko
- 出版者
- The Royal Society of Chemistry
- 雑誌
- Chemical communications (ISSN:13597345)
- 巻号頁・発行日
- vol.48, no.52, pp.6481-6483, 2012-07
- 被引用文献数
- 11 3
Carboxyl groups were introduced at the peripheral positions of dodecaphenylporphyrin to link nanochannel structures with intermolecular hydrogen bonds to make the supramolecular structures robust.
- 著者
- Matsuda Tomoyuki Kim Jungeun Moritomo Yutaka
- 出版者
- The Royal Society of Chemistry
- 雑誌
- RSC Advances (ISSN:20462069)
- 巻号頁・発行日
- vol.2011, no.9, pp.1716-1720, 2011-11
- 被引用文献数
- 9 1
We investigated the thermal expansion properties of metal nitroprussides, MA[Fe(CN)5NO]·zH2O (MA = Mn, Fe, Co, Ni, Cu, Zn, and Cd), which have various network structures, i.e. three-dimensional (3D) cubic (Fm[3 with combining macron]m for MA = Fe, Co, and Ni), distorted three-dimensional (distorted-3D) orthorhombic (Pnma for MA = Mn, Zn, and Cd), and two-dimensional (2D) orthorhombic (Amm2 for MA = Cu) structures. In the cubic system, in which the unbridged NO groups are randomly distributed, isotropic positive thermal expansion was observed. On the contrary, in the orthorhombic system, in which the unbridged NO groups are uniaxially distributed, positive (negative) thermal expansion was observed along (perpendicular to) the uniaxial direction. We interpreted the characteristic thermal responses in terms of the rotational vibrations of the [Fe(CN)5NO] units as well as their steric hindrances due to the network dimensionality.