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Dive into the research topics where Yasuko T. Osano is active.

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Featured researches published by Yasuko T. Osano.


Archive | 1999

Synthesis of Novel Complex with Bridged Bis(indenyl) Ligand and its Polymerization Behavior of Propylene

Taku Kato; Hideshi Uchino; Naoshi Iwama; Kaori Imaeda; Masami Kashimoto; Yasuko T. Osano; Toshihiko Sugano

Novel ansa-zirconocenes characterized by a bis(indenyl) ansa ligand bridged between 4 and 4’ positions were synthesized. The behavior of these complexes as polymerization catalysts in the presence of methylalumoxane and properties of the polymers thus obtained were studied. Isotactic polypropylene was obtained by using C 2-symmetrical zirconocene. Especially, rac-Me2Si[4,4’-(3-methyl-1-phenylindenyl)2]ZrCl2 produced polypropylene with high tacticity, and a small amount of 3,1-type regiodefect. By the polymerization test with above complex at various propylene pressures, the depression of melting point of polymer was observed with decrease of monomer pressure, which seemed to be due to the lowering of isotacticity mainly. And by the plot of 1/P N versus 1/[propylene], we got a relatively large value of k TO/k P, and it is suggested that β-H transfer to propylene was not suppressed by substituent at 3 position effectively. Changing substituent at 3 position from methyl group to ethyl group resulted in increasing of molecular weight of polymer.


Journal of Organic Chemistry | 1996

A New Family of Indoaniline-Derived Calix[4]arenes: Synthesis and Optical Recognition Properties as a Chromogenic Receptor(1).

Yuji Kubo; Sumio Tokita; Yuko Kojima; Yasuko T. Osano; Takao Matsuzaki


Chemistry Letters | 1998

Absolute Stereochemistry and CD Spectra of Resolved Enantiomers of the Colored Form of a Photochromic Dithienylethene

Yasushi Yokoyama; Naoya Hosoda; Yasuko T. Osano; Chizuko Sasaki


Studies in Surface Science and Catalysis | 1999

Synthesis of novel ansa-metallocene complex with bridged bis(indenyl) ligand and its application for olefin polymerization

Taku Kato; Hideshi Uchino; Naoshi Iwama; Yasuko T. Osano; Toshihiko Sugano


Organometallics | 2004

Synthesis, structure, and polymerization behavior of bridged zirconocenes bearing seven-membered rings

Naoshi Iwama; Hideshi Uchino; Yasuko T. Osano; Toshihiko Sugano


Chemistry Letters | 1989

Novel spiro-compound, hyperolactone from Hypericum chinense L.

Masahiro Tada; Masashi Nagai; Chieko Okumura; Yasuko T. Osano; Takao Matsuzaki


Organometallics | 2005

Synthesis, structure, and polymerization behavior of novel azulenyl metallocenes producing propylene-ethylene pseudo-copolymer

Naoshi Iwama; Yasuko T. Osano


Chemistry Letters | 2004

Thermally reversible photochromism of pyrazole derivatives

Yasushi Yokoyama; Yuko Kurimoto; Yasuyo Saito; Manabu Katsurada; Itaru Okada; Yasuko T. Osano; Chizuko Sasaki; Yayoi Yokoyama; Hideyuki Tukada; Masafumi Adachi; Shinichiro Nakamura; Tetsuo Murayama; Toshie Harazono; Tetsuya Kodaira


Bulletin of the Chemical Society of Japan | 2000

X-Ray Crystal Structure Analysis of Silicon Phthalocyanines: Study of the Relationship between Intermolecular Interaction and Photochemical Sensitivity

Yuko Kojima; Yasuko T. Osano; Toyoshi Ohashi


Journal of Imaging Science and Technology | 2003

Structural characterization of Y-like titanylphthalocyanine

Jin Mizuguchi; Hideki Yamakami; Yuko Kojima; Chiduko Sasaki; Yasuko T. Osano

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Yuko Kojima

Mitsubishi Chemical Corporation

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Naoshi Iwama

Mitsubishi Chemical Corporation

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Chizuko Sasaki

Mitsubishi Chemical Corporation

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Hideshi Uchino

Mitsubishi Chemical Corporation

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Toshihiko Sugano

Mitsubishi Chemical Corporation

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Toyoshi Ohashi

Mitsubishi Chemical Corporation

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Takao Matsuzaki

Mitsubishi Chemical Corporation

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Taku Kato

Mitsubishi Chemical Corporation

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Yasushi Yokoyama

Yokohama National University

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Akemi Hosokawa

Mitsubishi Chemical Corporation

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