Faculty Profiles - YAMAGUCHI, Shigehiro

Papers - YAMAGUCHI, Shigehiro

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Solubilization by different-sized surfactant mixtures.

Yamaguchi S

Journal of colloid and interface science Vol. 286 ( 1 ) page： 355 - 9 2005.6

Ladder oligo(p-phenylenevinylene)s with silicon and carbon bridges

CH Xu, A Wakamiya, S Yamaguchi

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY Vol. 127 ( 6 ) page： 1638 - 1639 2005.2

A key role of orbital interaction in the main group element-containing pi-electron systems

Yamaguchi S, Tamao K

CHEMISTRY LETTERS Vol. 34 ( 1 ) page： 2 - 7 2005.1

General Synthesis of Thiophene and Selenophene-Based Heteroacenes

T. Okamoto, K. Kudoh, A. Wakamiya, and S. Yamaguchi

Org. Lett. Vol. 7 page： 5301-5304 2005

The Chemistry of Silicon-Containing Ladder p-Conjugated Systems

S. Yamaguchi and C. Xu

Vol. 63 page： 1115-1123 2005

Toward pi-Conjugated Molecular Bundles: Synthesis of a Series of B,B',B"-Trianthryl-N,N',N"-triarylborazines and the Bundle Effects on their Properties

A. Wakamiya, T. Ide, and S. Yamaguchi

J. Am. Chem. Soc Vol. 127 page： 14859-14866 2005

Synthesis, Structures, and Photophysical Properties of Silicon and Carbon-Bridged Ladder Oligo(p-phenylenevinylene)s and Related pi-Electron Systems

S. Yamaguchi, C. Xu, H. Yamada, and A. Wakamiya

Vol. 690 page： 5365-5377 2005

A Key Role of Orbital Interaction in the Main Group Element-Containing -Electron Systems

S. Yamaguchi and K. Tamao

Chem. Lett. Vol. 34 page： 2-7 2005

Ladder Oligo(p-phenylenevinylene)s with Silicon and Carbon Bridges

C. Xu, A. Wakamiya, and S. Yamaguchi

J. Am. Chem. Soc. Vol. 127 page： 1638-1639 2005

A Key Role of Orbital Interaction in the Main Group Element-Containing -Electron Systems

S. Yamaguchi, K. Tamao

Chem. Lett. Vol. 34 page： 2-7 2005

Ladder bis-silicon-bridged stilbenes as a new building unit for fluorescent pi-conjugated polymers

CH Xu, H Yamada, A Wakamiya, S Yamaguchi, K Tamao

MACROMOLECULES Vol. 37 ( 24 ) page： 8978 - 8983 2004.11

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：AMER CHEMICAL SOC

pi-Conjugated polymers containing the bis-silicon-bridged stilbene (5,10-dihydro-5,10-disilaindeno[2,1-a]indene) skeleton in the main chain have been synthesized. Our synthesis uses 3,8-dimethoxy derivatives (2) and 3,8-difluoro derivatives (3) of the bis-silicon-bridged stilbene as the key precursors. Thus, their regioselective ortho-metalation reactions with appropriate bases (sec-butyllithium for 2 and (LiBu2ZnTMP)-Bu-t for 3) followed by quenching with electrophiles afford various 2,7-difunctionalized bis-silicon-bridged stilbenes. By using the 2,7-difunctionalized derivatives as starting materials, a series of pi-conjugated polymers, including homopolymers of the bis-silicon-bridged stilbene skeleton and copolymers between the bis-silicon-bridged stilbene unit and other types of monomer units, such as bithiophene and diethynylbenzene, have been synthesized by cross-coupling methodologies. While all the homopolymers of the bis-silicon-bridged stilbene skeleton exhibit an intense blue to greenish-blue emission, the copolymers with the bithiophene and diethynylbenzene units show green and orange emissions, respectively, suggesting easy tuning of the emission colors over a wide range.

DOI： 10.1021/ma0486546

Web of Science

General Silaindene Synthesis Based on Intramolecular Reductive Cyclization: Synthesis of New Fluorescent Silicon-Containing p-Electron Systems Reviewed

C. Xu, A. Wakamiya, S. Yamaguchi

Org. Lett., 6, 3707-3710 Vol. 6 ( 21 ) page： 3707 - 3710 2004.10

All-anti Pentasilane: Conformation Control of Oligosilanes Based on Bis(tetramethylene)-tethered Trisilane Unit Reviewed

Hayato Tsuji, Aiko Fukazawa, Shigehiro Yamaguchi, Akio Toshimitsu, Kohei Tamao

Organometallics Vol. 23 ( 14 ) page： 3375 - 3377 2004.7

First Br-4 four centre-six electron and Se2Br5 seven centre-ten electron bonds in nonionic bromine adducts of selenanthrene

Nakanishi W, Hayashi S, Yamaguchi S, Tamao K

CHEMICAL COMMUNICATIONS ( 2 ) page： 140 - 141 2004.1

Ladder Bis-Silicon-Bridged Stilbenes as a New Building Unit for Fluorescent pi-Conjugated Polymers

C. Xu, H. Yamada, A. Wakamiya, S. Yamaguchi, and K. Tamao

Macromolecules Vol. 37 page： 8978-8983 2004

Endo-endo mode intramolecular reductive cyclization of cyclic 1,2-bis(silylethynyl)benzenes

Yamaguchi S, Miyasato M, Tamao K

CHEMISTRY LETTERS Vol. 32 ( 12 ) page： 1104 - 1105 2003.12

Bis-Silicon-Bridged Stilbene Homologues Synthesized by New Intramolecular Reductive Double Cyclization

S. Yamaguchi, C, Xu, and K. Tamao,

J. Am. Chem. Soc. Vol. 125 page： 13662-13663 2003

The double N-arylation of primary amines: Toward multisubstituted carbazoles with unique optical properties

Nozaki K, Takahashi K, Nakano K, Hiyama T, Tang HZ, Fujiki M, Yamaguchi S, Tamao K

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION Vol. 42 ( 18 ) page： 2051 - 2053 2003

A colorimetric and ratiometric fluorescent chemosensor with three emission changes: Fluoride ion sensing by a triarylborane-porphyrin conjugate

Kubo Y, Yamamoto M, Ikeda M, Takeuchi M, Shinkai S, Yamaguchi S, Tamao K

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION Vol. 42 ( 18 ) page： 2036 - 2040 2003

Dibenzoborole-containing pi-electron systems: Remarkable fluorescence change based on the "on/off" control of the p(pi)-pi* conjugation

Yamaguchi S, Shirasaka T, Akiyama S, Tamao K

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY Vol. 124 ( 30 ) page： 8816 - 8817 2002.7

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Papers - YAMAGUCHI, Shigehiro