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6 results on '"Tappei Tanabe"'

3. An electrically conductive metallocycle: densely packed molecular hexagons with π-stacked radicals

Author

Mengxing Cui, Ryuichi Murase, Yongbing Shen, Tetsu Sato, Shohei Koyama, Kaiji Uchida, Tappei Tanabe, Shinya Takaishi, Masahiro Yamashita, and Hiroaki Iguchi

Subjects
General Chemistry
Abstract

Intrinsically electron-conductive metallocycle was synthesized. π-Radicals play a key role in constructing π-stacked columns among molecular hexagons and achieving high electrical conductivity over 10−4 S cm−1 in polycrystalline pellet.

Published
2022
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4. Bluish Hydrochromic Naphthalenediimide Salt: Change of Hydrogen-bond Interactions as the New Mechanism of Vapochromism

Author

Shinya Takaishi, Tamon Yamauchi, Kaiji Uchida, Tappei Tanabe, Tetsu Sato, Kentaro Fuku, and Hiroaki Iguchi

Subjects
chemistry.chemical_classification, Hydrogen bond, Chemistry, Salt (chemistry), General Chemistry, Chromophore, Photochemistry
Abstract

Naphthalenediimide (NDI) is generally a yellowish to reddish chromophore, which shows vapochromism by the alternation of charge-transfer (CT) interactions at the NDI core. On the contrary, we disco...

Published
2021
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5. Preliminary chemical reduction for synthesizing a stable porous molecular conductor with neutral metal nodes

Author

Shinya Takaishi, Shohei Koyama, Tappei Tanabe, Hiroaki Iguchi, and Masahiro Yamashita

Subjects
Materials science, Inorganic chemistry, Metals and Alloys, chemistry.chemical_element, General Chemistry, Electrochemistry, Catalysis, Surfaces, Coatings and Films, Electronic, Optical and Magnetic Materials, Conductor, Reduction (complexity), Metal, chemistry, visual_art, Materials Chemistry, Ceramics and Composites, Chemical reduction, visual_art.visual_art_medium, Porosity, Cobalt
Abstract

Preliminary chemical reduction of naphthalenediimide (NDI)-based organic ligands was applied to the synthesis of a porous molecular conductor (PMC) with neutral metal nodes (cobalt(ii) acetylacetonate). The obtained semiconductive PMC (PMC-2) was stable due to the neutral metal nodes, providing an advantage over electrochemical reduction.

Published
2020
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6. Bluish Hydrochromic Naphthalenediimide Salt: Change of Hydrogen-bond Interactions as the New Mechanism of Vapochromism.

Author

Tappei Tanabe, Tetsu Sato, Kentaro Fuku, Kaiji Uchida, Tamon Yamauchi, Shinya Takaishi, and Hiroaki Iguchi

Abstract

Naphthalenediimide (NDI) is generally a yellowish to reddish chromophore, which shows vapochromism by the alternation of charge-transfer (CT) interactions at the NDI core. On the contrary, we discovered that the deprotonation of N,N¤-dihydroxy-1,4,5,8-naphthalenetetracarboxdiimide (NDI-(OH)2) gave a bluish organic salt with a hydrochromic property, which has been rare in conventional NDI derivatives. On the basis of the structural analyses and the calculation, the origin of the hydrochromism can be explained by the change of hydrogenbond interaction between the anionic imide group and H2O molecules. [ABSTRACT FROM AUTHOR]

Published
2021
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