H
Hachiro Nakanishi
Researcher at Tohoku University
Publications - 156
Citations - 4038
Hachiro Nakanishi is an academic researcher from Tohoku University. The author has contributed to research in topics: Polymerization & Polydiacetylenes. The author has an hindex of 33, co-authored 156 publications receiving 3903 citations. Previous affiliations of Hachiro Nakanishi include National Institute for Materials Science & College of Industrial Technology.
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Journal ArticleDOI
A Novel Preparation Method of Organic Microcrystals
Hitoshi Kasai,Hari Singh Nalwa,Hidetoshi Oikawa,Shuji Okada,Hiro Matsuda,Nobutsugu Minami,Atsushi Kakuta,Katsumichi Ono,Akio Mukoh,Hachiro Nakanishi +9 more
TL;DR: In this article, a reprecipitation method was used to obtain organic microcrystals ranging from several tens nm to µm in size of several chromophores by simply dispersing ethanol solutions of compounds into stirred water.
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Size-Dependent Colors and Luminescences of Organic Microcrystals
TL;DR: In this article, Perylene microcrystals with different sizes from about 50 nm to about 200 nm were prepared using the reprecipitation method and their excitonic absorption peaks were found to shift to the high energy side with decreasing crystal size.
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Novel polydiacetylenes for optical materials: beyond the conventional polydiacetylenes
TL;DR: In this article, a review of the design and preparation of diacetylene monomers and their polymers is presented, where the aim is to produce materials which exhibit large third-order nonlinear optical susceptibilities and which consequently, can be obtained in a form to be customised for optical devices.
Journal ArticleDOI
Single-crystal-to-single-crystal transformation of diolefin derivatives in nanocrystals.
TL;DR: Topochemical cycloaddition polymerization of methyl p-phenylenediacrylate and 2,5-distyrylpyridine in nanocrystals, prepared by the reprecipitation method, show single-crystal-to-single-Crystal transformation.
Journal ArticleDOI
Crystal Size Dependence of Emission from Perylene Microcrystals
Hitoshi Kasai,Hirokazu Kamatani,Yuko Yoshikawa,Shuji Okada,Hidetoshi Oikawa,Akira Watanabe,Osamu Itoh,Hachiro Nakanishi +7 more
TL;DR: In this article, the authors found that luminescence peak position from free-exciton state was gradually shifted to high energy side with reducing the crystal size, even if the microcrystals were fabricated by different kinds of preparation techniques.