T
Tadashi Ema
Researcher at Okayama University
Publications - 191
Citations - 6725
Tadashi Ema is an academic researcher from Okayama University. The author has contributed to research in topics: Catalysis & Porphyrin. The author has an hindex of 41, co-authored 179 publications receiving 5761 citations. Previous affiliations of Tadashi Ema include University of California, Davis & Kyoto University.
Papers
More filters
Journal ArticleDOI
Recent progress in catalytic conversions of carbon dioxide
TL;DR: An overview of the recent progress in this field can be found in this paper, where each research is concisely summarized one by one using a single reaction scheme, a representative catalyst structure, and/or a catalytic cycle.
Journal ArticleDOI
Bifunctional porphyrin catalysts for the synthesis of cyclic carbonates from epoxides and CO2: structural optimization and mechanistic study.
TL;DR: Based on the excellent catalyst 1d, MgII porphyrin 1o with eight tetraalkylammonium bromide groups, which showed even higher catalytic activity (turnover number, 138,000; turnover frequency, 19,000 h–1) and the catalytic mechanism was studied.
Journal ArticleDOI
Ruffling in a Series of Nickel(II) meso-Tetrasubstituted Porphyrins as a Model for the Conserved Ruffling of the Heme of Cytochromes c.
Walter Jentzen,M. C. Simpson,J. D. Hobbs,X.Z. | Song,X.Z. | Song,Tadashi Ema,Nora Y. Nelson,Craig J. Medforth,Kevin M. Smith,M. Veyrat,Marinella Mazzanti,René Ramasseul,Jean-Claude Marchon,Toshihiko Takeuchi,William A. Goddard,John A. Shelnutt,John A. Shelnutt +16 more
TL;DR: A series of meso-tetrasubstituted porphyrins for which the substituents vary in size is investigated, expected to result in unique alterations of the chemical and physical properties of the nominally planar p Morphyrin macrocycle.
Journal ArticleDOI
A bifunctional catalyst for carbon dioxide fixation: cooperative double activation of epoxides for the synthesis of cyclic carbonates
TL;DR: A very active bifunctional porphyrin catalyst showing a high turnover number for the synthesis of cyclic carbonates from CO(2) and epoxides under solvent-free conditions is developed.
Journal ArticleDOI
Bifunctional catalysts based on m-phenylene-bridged porphyrin dimer and trimer platforms: synthesis of cyclic carbonates from carbon dioxide and epoxides.
TL;DR: Highly active bifunctional diporphyrin and triporphyrin catalysts synthesized through Stille coupling reactions exhibited improved catalytic activities for the reaction of CO2 with epoxides to form cyclic carbonates, because of the multiple catalytic sites which cooperatively activate the epoxide.