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Chiaki Yokoyama
Researcher at Tohoku University
Publications - 72
Citations - 2177
Chiaki Yokoyama is an academic researcher from Tohoku University. The author has contributed to research in topics: Ionic liquid & Catalysis. The author has an hindex of 26, co-authored 72 publications receiving 2042 citations. Previous affiliations of Chiaki Yokoyama include Niigata University.
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Preparation of 5-hydroymethylfurfural by dehydration of fructose in the presence of acidic ionic liquid
TL;DR: In this paper, the preparation of 5-hydroymethylfurfural (HMF) by the dehydration of fructose in the presence of the Bronsted acidic ionic liquid, 3-allyl-1-(4-sulfobutyl)imidazolium trifluoromethanesulfonate, as well as its Lewis acid derivative, 3]-al.
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Viscosity of [bmim][PF6] and [bmim][BF4] at high pressure
TL;DR: The viscosities of 1-butyl-3-methylimidazolium hexafluorophosphate ([bmim] [PF6]) and 1-methyl-3methylamine tetrafluoroborate ([BF4]) were measured by using a rolling-ball viscometer.
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Heterogeneous Heck reaction catalyzed by Pd/C in ionic liquid
Hisahiro Hagiwara,Yumiko Shimizu,Takashi Hoshi,Toshio Suzuki,Masayoshi Ando,Keisuke Ohkubo,Chiaki Yokoyama +6 more
TL;DR: Pd/C-catalyzed Heck reactions of aryl halides with olefins with moderate to satisfactory yields in ionic liquid was reported in this paper, where a catalyst was easily recycled.
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Thermal Conductivities of [bmim][PF 6 ], [hmim][PF 6 ], and [omim][PF 6 ] from 294 to 335 K at Pressures up to 20 MPa
TL;DR: In this article, the thermal conductivities of ionic liquids (ILs) were measured using transient short-hot-wire (SHW) method and a simple correlation was developed based on the Mohanty theory.
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Novel acidic ionic liquids catalytic systems for Friedel-Crafts alkylation of aromatic compounds with alkenes
Kun Qiao,Chiaki Yokoyama +1 more
TL;DR: In this paper, the Friedel-Crafts alkylation of aromatic compounds with alkenes was studied and a novel ionic liquids catalytic system was developed for the alkylated compounds.