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Your search keyword '"Tetsuaki Fujihara"' showing total 14 results
Start Over Author "Tetsuaki Fujihara" Journal chemistry letters
14 results on '"Tetsuaki Fujihara"'

1. Synthesis of Highly Insulated Conjugated Metallopolymers Containing Terpyridine–Metal Complexes

Author

Takuro Hosomi, Hiroshi Masai, Wakana Matsuda, Yasushi Tsuji, Jun Terao, Shu Seki, and Tetsuaki Fujihara

Subjects
Substituent, 02 engineering and technology, General Chemistry, Conjugated system, 010402 general chemistry, 021001 nanoscience & nanotechnology, Photochemistry, 01 natural sciences, 0104 chemical sciences, Metal, chemistry.chemical_compound, Monomer, chemistry, visual_art, Polymer chemistry, visual_art.visual_art_medium, Charge carrier, Terpyridine, 0210 nano-technology
Abstract

A bridging monomer with terpyridine moieties at both ends of the insulated conjugated chain was successfully synthesized. The synthesis necessitated a new strategy, in which FeII was employed as a removable water-solubilizing substituent. The monomer was able to coordinate with FeII, CoII, NiII, or RuII to give highly insulated conjugated metallopolymers. The high-coverage insulation suppressed the recombination of charge carriers relative to an uninsulated reference and provided higher charge mobility along the chain than the less insulated metallopolymer.

Published
2016

2. Copper-catalyzed Silylative Allylation of Ketones and Aldehydes Employing Allenes and Silylboranes

Author

Tatsuya Yamaguchi, Yosuke Tani, Yasushi Tsuji, Tetsuaki Fujihara, and Jun Terao

Subjects
Chemistry, Stereochemistry, Copper catalyzed, Organic chemistry, General Chemistry
Abstract

The copper-catalyzed silylative allylation of ketones with allenes and silylboranes via an in situ generated β-silylallylcopper intermediate has been developed. Various ketones and allenes were con...

Published
2015

3. Synthesis of Cyclic Carbonates from Epoxides and Carbon Dioxide Catalyzed by MgCl2

Author

Tetsuaki Fujihara, Taiga Mizoe, Masaki Inokuchi, Keisuke Nogi, Jun Terao, and Yasushi Tsuji

Subjects
inorganic chemicals, chemistry.chemical_classification, 010405 organic chemistry, Magnesium, Inorganic chemistry, Salt (chemistry), chemistry.chemical_element, General Chemistry, 010402 general chemistry, 01 natural sciences, 0104 chemical sciences, Catalysis, chemistry.chemical_compound, chemistry, Carbon dioxide, Organic chemistry
Abstract

Magnesium chloride (MgCl2), a stable and cheap salt, works as an active catalyst for the synthesis of cyclic carbonates from epoxides and atmospheric-pressure carbon dioxide (CO2). Various epoxides are converted to the corresponding cyclic carbonates in good to high yields.

Published
2017

4. Encapsulation by Cyclic Porphyrin Dimers Using Various Interaction Modes

Author

Yasushi Tsuji, Tetsuaki Fujihara, Jun Terao, and Yusuke Chiba

Subjects
chemistry.chemical_compound, Chemistry, Molecule, General Chemistry, Fluorene, Porphyrin, Combinatorial chemistry, Encapsulation (networking)
Abstract

We synthesized cyclic host molecules, A, B, and C, based on a rigid π-conjugated system composed of porphyrin and fluorene units. After the transformation of the ester units of cyclic host B to car...

Published
2014

5. Recent Development of Homogeneous Transition Metal Catalysts with Nanosize Ligands

Author

Tetsuaki Fujihara and Yasushi Tsuji

Subjects
Chemical engineering, Transition metal, Homogeneous, Chemistry, Organic chemistry, General Chemistry, Catalysis
Abstract

Expanding catalytic environment to a nanosize is one of the most promising ways to improve performance of homogeneous catalysts. In this highlight review, recent development in homogeneous transiti...

Published
2007

6. Synthesis of Insulated Pt–Alkynyl Complex Polymer

Author

Yasushi Tsuji, Hiroshi Masai, Tetsuaki Fujihara, and Jun Terao

Subjects
chemistry.chemical_classification, Chain (algebraic topology), chemistry, Intramolecular force, Polymer chemistry, Moiety, macromolecular substances, General Chemistry, Polymer
Abstract

A Pt–alkynyl polymer in which the π-conjugated chain was completely covered with macrocycles was synthesized by intramolecular self-inclusion of an oligomeric phenyleneethynylene as a guest moiety ...

Published
2012

7. Synthesis of Linked Symmetric [3]Rotaxane Having an Oligomeric Phenylene–Ethynylene Unit as a π Guest via Double Sonogashira Cross-coupling

Author

Yasushi Tsuji, Jun Terao, Akihisa Wadahama, and Tetsuaki Fujihara

Subjects
Coupling, Rotaxane, Stereochemistry, Chemistry, Phenylene, Polymer chemistry, Sonogashira coupling, Molecule, General Chemistry, Unit (ring theory)
Abstract

Linked symmetric [3]rotaxanes consisting of an oligomeric phenylene–ethynylene (OPE) unit as a π-conjugated guest and two molecules of organic soluble permethylated α-cyclodextrins (PM α-CDs) as ma...

Published
2010

8. Structural Characterization of Ruthenium–Dioxolene Complexes with RuII–SQ and RuII–Cat Frameworks

Author

Rei Okamura, Koji Tanaka, and Tetsuaki Fujihara

Subjects
Chemistry, Polymer chemistry, chemistry.chemical_element, General Chemistry, Photochemistry, Electronic properties, Ruthenium
Abstract

The structural and electronic properties of [RuII(trpy)(ClSQ)(PPh3)]+ (trpy = 2,2′:6′,2″-terpyridine; ClSQ = 4-chlorobenzosemiquinonate) and [RuII(trpy)(ClCat)(PPh3)] (ClCat = 4-chlorocatecholate) ...

Published
2005

9. Redox Behavior of New Ru–Dioxolene–Ammine Complexes and Catalytic Activity toward Electrochemical Oxidation of Alcohol under Mild Conditions

Author

Takami Hino, Tetsuaki Fujihara, Tohru Wada, and Koji Tanaka

Subjects
Chemistry, Alcohol oxidation, Polymer chemistry, Organic chemistry, General Chemistry, Electrochemistry, Redox, Catalysis
Abstract

The new Ru–dioxolene–ammine complexes, [RuII(NH3)(sq)(trpy)](ClO4) (1, sq = 3,5-di-tert-butyl-1,2-benzosemiquinone, trpy = 2,2′:6′,2″-terpyridine) and [RuIII(NH3)(sq)(trpy)](ClO4)2 (2), were prepar...

Published
2004

10. Synthesis of Highly Insulated Conjugated Metallopolymers Containing TerpyridineMetal Complexes.

Author

Takuro Hosomi, Hiroshi Masai, Wakana Matsuda, Shu Seki, Tetsuaki Fujihara, Yasushi Tsuji, and Jun Terao

Abstract

A bridging monomer with terpyridine moieties at both ends of the insulated conjugated chain was successfully synthesized. The synthesis necessitated a new strategy, in which FeII was employed as a removable water-solubilizing substituent. The monomer was able to coordinate with FeII, CoII, NiII, or RuII to give highly insulated conjugated metallopolymers. The highcoverage insulation suppressed the recombination of charge carriers relative to an uninsulated reference and provided higher charge mobility along the chain than the less insulated metallopolymer. [ABSTRACT FROM AUTHOR]

Published
2016
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11. Copper-catalyzed Silylative Allylation of Ketones and Aldehydes Employing Allenes and Silylboranes.

Author

Yosuke Tani, Tatsuya Yamaguchi, Tetsuaki Fujihara, Jun Terao, and Yasushi Tsuji

Abstract

The copper-catalyzed silylative allylation of ketones with allenes and silylboranes viaa n insitu generated β-silylallyl-copper intermediate has been developed. Various ketones and allenes were converted to the homoallylic tertiary alcohols bearing internal (E)-vinylsilane moieties regio- and stereo-selectively in good to high yields. Aldehydes were also employed as electrophiles in the reaction.) [ABSTRACT FROM AUTHOR]

Published
2015
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12. Encapsulation by Cyclic Porphyrin Dimers Using Various Interaction Modes.

Author

Jun Terao, Yusuke Chiba, Tetsuaki Fujihara, and Yasushi Tsuji

Abstract

We synthesized cyclic host molecules, A, B, and C, based on a rigid π-conjugated system composed of porphyrin and fluorene units. After the transformation of the ester units of cyclic host B to carboxylates, host C became soluble in water. These host molecules could encapsulate different molecules, based on various interactions: coordination bonds between porphyrin-bound metals (Zn) and N atoms, π-π interactions, or hydrophobic interactions. [ABSTRACT FROM AUTHOR]

Published
2014
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13. Synthesis and Redox Response of Insulated Molecular Wire Elongated through Iron-Terpyridine Coordination Bonds.

Author

Jun Terao, Takuro Hosomi, Hiroshi Masai, Wakana Matsuda, Shu Seki, Tetsuaki Fujihara, and Yasushi Tsuji

Abstract

We synthesized an insulated bridging ligand consisting of a π-conjugated backbone sheathed by permethylated α-cyclodextrin and terpyridyl moieties at either end. This bridging ligand was able to coordinate with Fe2+ to afford an insulated metallopolymer that was elongated through coordination bonds. The molecular wire exhibited a reversible response to a chemical redox stimulus. [ABSTRACT FROM AUTHOR]

Published
2014
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14. Synthesis of Insulated Pt-Alkynyl Complex Polymer.

Author

Terao, Jun, Hiroshi Masai, Tetsuaki Fujihara, and Yasushi Tsuji

Abstract

A Pt-alkynyl polymer in which the π-conjugated chain was completely covered with macrocycles was synthesized by intramolecular self-inclusion of an oligomeric phenyleneethynylene as a guest moiety with two permethylated α-cyclodextrins as hosts followed by copolymerization with a Pt(II) complex. [ABSTRACT FROM AUTHOR]

Published
2012
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