• 4890 Citations
  • 38 h-Index
1991 …2019
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Research Output 1991 2019

  • 4890 Citations
  • 38 h-Index
  • 120 Article
  • 1 Chapter
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Article
2019
1 Citation (Scopus)

Axially Chiral peri-Xanthenoxanthenes as a Circularly Polarized Luminophore

Takaishi, K., Hinoide, S., Matsumoto, T. & Ema, T., Jul 31 2019, In : Journal of the American Chemical Society. 141, 30, p. 11852-11857 6 p.

Research output: Contribution to journalArticle

Fluorescence
Luminescence
Naphthol
Dipole moment
Naphthalene
5 Citations (Scopus)

Chiral Bifunctional Metalloporphyrin Catalysts for Kinetic Resolution of Epoxides with Carbon Dioxide

Maeda, C., Mitsuzane, M. & Ema, T., Mar 15 2019, In : Organic Letters. 21, 6, p. 1853-1856 4 p.

Research output: Contribution to journalArticle

Metalloporphyrins
epoxy compounds
Epoxy Compounds
Carbon Dioxide
carbon dioxide
Thiophenes
Porphyrins
Infrared absorption
Agglomeration
Infrared radiation
6 Citations (Scopus)

Chiroptical and catalytic properties of doubly binaphthyl-strapped chiral porphyrins

Maeda, C., Ogawa, K., Sadanaga, K., Takaishi, K. & Ema, T., Jan 1 2019, In : Chemical Communications. 55, 8, p. 1064-1067 4 p.

Research output: Contribution to journalArticle

Porphyrins
Epoxy Compounds
Cotton
Kinetics
6 Citations (Scopus)
Fluorophores
Chirality
Naphthalene
Luminescence
Coloring Agents
7 Citations (Scopus)

Hemisquaramide Tweezers as Organocatalysts: Synthesis of Cyclic Carbonates from Epoxides and CO 2

Takaishi, K., Okuyama, T., Kadosaki, S., Uchiyama, M. & Ema, T., Mar 1 2019, In : Organic Letters. 21, 5, p. 1397-1401 5 p.

Research output: Contribution to journalArticle

epoxy compounds
Carbonates
Epoxy Compounds
Bites and Stings
Carbon Monoxide
1 Citation (Scopus)

Synthesis and electronic properties of π-expanded carbazole-based porphyrins

Maeda, C., Tanaka, Y., Shirakawa, T. & Ema, T., Jan 1 2019, In : Chemical Communications. 55, 68, p. 10162-10165 4 p.

Research output: Contribution to journalArticle

Porphyrins
Electronic properties
Cyclization
Absorption spectroscopy
Discrete Fourier transforms
6 Citations (Scopus)

Synthesis of chiral carbazole-based BODIPYs showing circularly polarized luminescence

Maeda, C., Nagahata, K., Takaishi, K. & Ema, T., Jan 1 2019, In : Chemical Communications. 55, 21, p. 3136-3139 4 p.

Research output: Contribution to journalArticle

Luminescence
4,4-difluoro-4-bora-3a,4a-diaza-s-indacene
carbazole
3 Citations (Scopus)
Multitasking
2,2'-Dipyridyl
Methylation
Carbonates
Epoxy Compounds
2018
29 Citations (Scopus)

Binaphthyl-Bipyridyl cyclic dyads as a chiroptical switch

Takaishi, K., Yasui, M. & Ema, T., Apr 25 2018, In : Journal of the American Chemical Society. 140, 16, p. 5334-5338 5 p.

Research output: Contribution to journalArticle

2,2'-Dipyridyl
Luminescence
Bearings (structural)
Switches
Fluorescence
11 Citations (Scopus)
Carbonates
Epoxy Compounds
Carbon Dioxide
Carbon dioxide
Positive ions
Oligomers
Fluorescence
Pyrenes
Luminescence
Conformations
4 Citations (Scopus)

Cross-Coupling Approach to an Array of Macrocyclic Receptors Functioning as Chiral Solvating Agents

Ema, T., Yamasaki, T., Watanabe, S., Hiyoshi, M. & Takaishi, K., Jan 1 2018, (Accepted/In press) In : Journal of Organic Chemistry.

Research output: Contribution to journalArticle

Hydrogen bonds
Atoms
Nuclear magnetic resonance
Titration
Discrete Fourier transforms
23 Citations (Scopus)

Intense excimer CPL of pyrenes linked to a quaternaphthyl

Takaishi, K., Takehana, R. & Ema, T., Jan 1 2018, In : Chemical Communications. 54, 12, p. 1449-1452 4 p.

Research output: Contribution to journalArticle

Pyrenes
Pyrene
Excited states
Conformations
2017
7 Citations (Scopus)
Boron
carbazoles
excimers
boron
Fluorescence
19 Citations (Scopus)

Chiral Macrocyclic Organocatalysts for Kinetic Resolution of Disubstituted Epoxides with Carbon Dioxide

Ema, T., Yokoyama, M., Watanabe, S., Sasaki, S., Ota, H. & Takaishi, K., Aug 4 2017, In : Organic Letters. 19, 15, p. 4070-4073 4 p.

Research output: Contribution to journalArticle

epoxy compounds
Epoxy Compounds
Carbon Dioxide
carbon dioxide
Kinetics
19 Citations (Scopus)

Electronic Tuning of Zinc Porphyrin Catalysts for the Conversion of Epoxides and Carbon Dioxide into Cyclic Carbonates

Maeda, C., Sasaki, S. & Ema, T., Mar 20 2017, In : ChemCatChem. 9, 6, p. 946-949 4 p.

Research output: Contribution to journalArticle

epoxy compounds
Carbonates
Epoxy Compounds
Porphyrins
Bearings (structural)
25 Citations (Scopus)

Helical Oligonaphthodioxepins Showing Intense Circularly Polarized Luminescence (CPL) in Solution and in the Solid State

Takaishi, K., Yamamoto, T., Hinoide, S. & Ema, T., Jul 12 2017, In : Chemistry - A European Journal. 23, 39, p. 9249-9252 4 p.

Research output: Contribution to journalArticle

Luminescence
Quantum yield
Rigidity
Fluorescence
Molecules
5 Citations (Scopus)

Magnetic Attachment of Lipase Immobilized on Bacteriogenic Iron Oxide Inside a Microtube Reactor for the Kinetic Resolution of Secondary Alcohols

Mandai, K., Fukuda, T., Miyazaki, Y., Hashimoto, H., Mandai, H., Ema, T., Takada, J. & Suga, S., Apr 21 2017, In : Synlett. 28, 7, p. 805-810 6 p.

Research output: Contribution to journalArticle

Lipase
Alcohols
Kinetics
Polytetrafluoroethylene
Magnets
Palladium
Absorption spectra
Crystal structure
carbazole
3 Citations (Scopus)
Infrared absorption
Palladium
Absorption spectra
Discrete Fourier transforms
Dimers
4 Citations (Scopus)

Spectroscopic Discrimination of Diastereomeric Complexes Involving an Axially Chiral Receptor

Filippi, A., Fraschetti, C., Guarcini, L., Zazza, C., Ema, T. & Speranza, M., Sep 20 2017, In : ChemPhysChem. 18, 18, p. 2475-2481 7 p.

Research output: Contribution to journalArticle

Electrospray ionization
discrimination
Ion sources
ionization
dopa
10 Citations (Scopus)

Synthesis of carbazole-based BODIPY dimers showing red fluorescence in the solid state

Maeda, C., Todaka, T., Ueda, T. & Ema, T., Jan 1 2017, In : Organic and Biomolecular Chemistry. 15, 44, p. 9283-9287 5 p.

Research output: Contribution to journalArticle

carbazoles
Dimers
Fluorescence
dimers
solid state
1 Citation (Scopus)

Synthetically useful variants of industrial lipases from: Burkholderia cepacia and Pseudomonas fluorescens

Yoshida, K., Ono, M., Yamamoto, T., Utsumi, T., Koikeda, S. & Ema, T., 2017, In : Organic and Biomolecular Chemistry. 15, 41, p. 8713-8719 7 p.

Research output: Contribution to journalArticle

Burkholderia cepacia
Pseudomonas fluorescens
pseudomonas
Lipase
Enantioselectivity
2016
Structural optimization
Catalysts
Catalyst activity
Bearings (structural)
Metalloporphyrins
20 Citations (Scopus)

Color-Tunable Solid-State Fluorescence Emission from Carbazole-Based BODIPYs

Maeda, C., Todaka, T., Ueda, T. & Ema, T., 2016, (Accepted/In press) In : Chemistry - A European Journal.

Research output: Contribution to journalArticle

Boron
Fluorescence
Color
Coloring Agents
Dyes
37 Citations (Scopus)

Determination of enantiomeric excess of carboxylates by fluorescent macrocyclic sensors

Akdeniz, A., Minami, T., Watanabe, S., Yokoyama, M., Ema, T. & Anzenbacher, P., Mar 1 2016, In : Chemical Science. 7, 3, p. 2016-2022 7 p.

Research output: Contribution to journalArticle

Ketoprofen
Ibuprofen
Phenylalanine
Fluorescence
Enantiomers
84 Citations (Scopus)

Highly Active and Robust Metalloporphyrin Catalysts for the Synthesis of Cyclic Carbonates from a Broad Range of Epoxides and Carbon Dioxide

Maeda, C., Shimonishi, J., Miyazaki, R., Hasegawa, J. Y. & Ema, T., 2016, (Accepted/In press) In : Chemistry - A European Journal.

Research output: Contribution to journalArticle

Metalloporphyrins
Carbonates
Epoxy Compounds
Carbon Dioxide
Carbon dioxide
11 Citations (Scopus)

Intramolecular Electronic Coupling in the Thiophene-Bridged Carbazole-Based Diporphyrin

Maeda, C., Takata, M., Honsho, A. & Ema, T., Dec 2 2016, In : Organic Letters. 18, 23, p. 6070-6073 4 p.

Research output: Contribution to journalArticle

Thiophenes
carbazoles
thiophenes
Dimers
dimers
18 Citations (Scopus)

Solvent-Free Benzoin and Stetter Reactions with a Small Amount of NHC Catalyst in the Liquid or Semisolid State

Ema, T., Nanjo, Y., Shiratori, S., Terao, Y. & Kimura, R., Nov 4 2016, In : Organic Letters. 18, 21, p. 5764-5767 4 p.

Research output: Contribution to journalArticle

Benzoin
semisolids
carbenes
catalysts
Catalysts
13 Citations (Scopus)

Theoretical Study on Highly Active Bifunctional Metalloporphyrin Catalysts for the Coupling Reaction of Epoxides with Carbon Dioxide

Hasegawa, J. Y., Miyazaki, R., Maeda, C. & Ema, T., 2016, (Accepted/In press) In : Chemical Record.

Research output: Contribution to journalArticle

Metalloporphyrins
Epoxy Compounds
Ammonium Compounds
Carbon Dioxide
Carbon dioxide
2015
149 Citations (Scopus)
Carbonates
Epoxy Compounds
Porphyrins
Carbon Dioxide
Dimers
29 Citations (Scopus)

Carbazole-Based Boron Dipyrromethenes (BODIPYs): Facile Synthesis, Structures, and Fine-Tunable Optical Properties

Maeda, C., Todaka, T. & Ema, T., Jun 19 2015, In : Organic Letters. 17, 12, p. 3090-3093 4 p.

Research output: Contribution to journalArticle

Boron
carbazoles
boron
Optical properties
optical properties
4 Citations (Scopus)

Chemical modification of lipase for rational enhancement of enantioselectivity

Ema, T. & Inoue, H., 2015, In : Chemistry Letters. 44, 10, p. 1374-1376 3 p.

Research output: Contribution to journalArticle

Enantioselectivity
Chemical modification
Lipase
Bearings (structural)
Catalyst activity
69 Citations (Scopus)

Quaternary ammonium hydroxide as a metal-free and halogen-free catalyst for the synthesis of cyclic carbonates from epoxides and carbon dioxide

Ema, T., Fukuhara, K., Sakai, T., Ohbo, M., Bai, F. Q. & Hasegawa, J. Y., Apr 1 2015, In : Catalysis Science and Technology. 5, 4, p. 2314-2321 8 p.

Research output: Contribution to journalArticle

Ammonium Hydroxide
Ammonium hydroxide
Halogens
Carbonates
Epoxy Compounds
2014
224 Citations (Scopus)

Bifunctional porphyrin catalysts for the synthesis of cyclic carbonates from epoxides and CO2: Structural optimization and mechanistic study

Ema, T., Miyazaki, Y., Shimonishi, J., Maeda, C. & Hasegawa, J. Y., Oct 29 2014, In : Journal of the American Chemical Society. 136, 43, p. 15270-15279 10 p.

Research output: Contribution to journalArticle

Structural optimization
Carbonates
Epoxy Compounds
Porphyrins
Catalysts
308 Citations (Scopus)

Recent progress in catalytic conversions of carbon dioxide

Maeda, C., Miyazaki, Y. & Ema, T., 2014, In : Catalysis Science and Technology. 4, 6, p. 1482-1497 16 p.

Research output: Contribution to journalArticle

Carbon Dioxide
Carbon dioxide
Catalysts
Catalyst selectivity
Catalyst activity
37 Citations (Scopus)

Selective anion sensing by chiral macrocyclic receptors with multiple hydrogen-bonding sites

Ema, T., Okuda, K., Watanabe, S., Yamasaki, T., Minami, T., Esipenko, N. A. & Anzenbacher, P., Mar 7 2014, In : Organic Letters. 16, 5, p. 1302-1305 4 p.

Research output: Contribution to journalArticle

Hydrogen Bonding
Anions
Hydrogen bonds
anions
hydrogen
26 Citations (Scopus)

Synergistic effect of quaternary ammonium hydroxide and crown ether on the rapid and clear dissolution of cellulose at room temperature

Ema, T., Komiyama, T., Sunami, S. & Sakai, T., 2014, In : RSC Advances. 4, 5, p. 2523-2525 3 p.

Research output: Contribution to journalArticle

Ammonium Hydroxide
Crown Ethers
Ammonium hydroxide
Crown ethers
Cellulose
2013
5 Citations (Scopus)

Multifunctional macrocyclic receptors as templates for aromatic amino acids: A rare example of a highly selective multi-input multi-output chemo-"Logic Gate"

Fraschetti, C., Filippi, A., Crestoni, M. E., Ema, T. & Speranza, M., Sep 2013, In : ChemPlusChem. 78, 9, p. 979-987 9 p.

Research output: Contribution to journalArticle

Aromatic Amino Acids
Logic gates
Amines
Dipeptides
Amino Acids
73 Citations (Scopus)

Robust porphyrin catalysts immobilized on biogenous iron oxide for the repetitive conversions of epoxides and CO2 into cyclic carbonates

Ema, T., Miyazaki, Y., Taniguchi, T. & Takada, J., Sep 2013, In : Green Chemistry. 15, 9, p. 2485-2492 8 p.

Research output: Contribution to journalArticle

porphyrin
Carbonates
Epoxy Compounds
Porphyrins
Iron oxides
7 Citations (Scopus)

Unexpected behavior of diastereomeric ions in the GasPhase: A stimulus for pondering on ee measurements by ESI-MS

Fraschetti, C., Filippi, A., Crestoni, M. E., Ema, T. & Speranza, M., Apr 2013, In : Journal of the American Society for Mass Spectrometry. 24, 4, p. 573-578 6 p.

Research output: Contribution to journalArticle

Complex Mixtures
Protons
Ions
Reaction kinetics
Ionization
2012
189 Citations (Scopus)

A bifunctional catalyst for carbon dioxide fixation: Cooperative double activation of epoxides for the synthesis of cyclic carbonates

Ema, T., Miyazaki, Y., Koyama, S., Yano, Y. & Sakai, T., May 11 2012, In : Chemical Communications. 48, 37, p. 4489-4491 3 p.

Research output: Contribution to journalArticle

Carbonates
Epoxy Compounds
Porphyrins
Carbon Monoxide
Carbon Dioxide
47 Citations (Scopus)

Biogenous iron oxide-immobilized palladium catalyst for the solvent-free Suzuki-Miyaura coupling reaction

Mandai, K., Korenaga, T., Ema, T., Sakai, T., Furutani, M., Hashimoto, H. & Takada, J., Jan 18 2012, In : Tetrahedron Letters. 53, 3, p. 329-332 4 p.

Research output: Contribution to journalArticle

Palladium
Catalysts
Leptothrix
Bearings (structural)
Catalyst supports
32 Citations (Scopus)

Construction of contiguous tetrasubstituted carbon stereocenters by intramolecular crossed benzoin reactions catalyzed by N-heterocyclic carbene (NHC) organocatalyst

Ema, T., Akihara, K., Obayashi, R. & Sakai, T., Nov 26 2012, In : Advanced Synthesis and Catalysis. 354, 17, p. 3283-3290 8 p.

Research output: Contribution to journalArticle

Benzoin
Carbon
Enantiomers
Enantioselectivity
Molecular structure
14 Citations (Scopus)

Molecular recognition of chiral diporphyrin receptor with a macrocyclic cavity for intercalation of aromatic compounds

Ema, T., Ura, N., Eguchi, K. & Sakai, T., 2012, In : Bulletin of the Chemical Society of Japan. 85, 1, p. 101-109 9 p.

Research output: Contribution to journalArticle

Molecular recognition
Aromatic compounds
Intercalation
Complexation
Bearings (structural)
39 Citations (Scopus)

Redesign of enzyme for improving catalytic activity and enantioselectivity toward poor substrates: Manipulation of the transition state

Ema, T., Nakano, Y., Yoshida, D., Kamata, S. & Sakai, T., Aug 21 2012, In : Organic and Biomolecular Chemistry. 10, 31, p. 6299-6308 10 p.

Research output: Contribution to journalArticle

Enantiomers
Enantioselectivity
enantiomers
catalytic activity
enzymes
27 Citations (Scopus)

Synthetic macrocyclic receptors in chiral analysis and separation

Ema, T., Dec 2012, In : Journal of Inclusion Phenomena and Macrocyclic Chemistry. 74, 1-4, p. 41-55 15 p.

Research output: Contribution to journalArticle

Calixarenes
Artificial Receptors
Crown Ethers
Porphyrins
Amides
2011
39 Citations (Scopus)

Chiral porphyrin dimer with a macrocyclic cavity for intercalation of aromatic guests

Ema, T., Ura, N., Eguchi, K., Ise, Y. & Sakai, T., Jun 7 2011, In : Chemical Communications. 47, 21, p. 6090-6092 3 p.

Research output: Contribution to journalArticle

Porphyrins
Intercalation
Dimers
Nuclear magnetic resonance
Molecules
42 Citations (Scopus)

Highly active lipase immobilized on biogenous iron oxide via an organic bridging group: The dramatic effect of the immobilization support on enzymatic function

Ema, T., Miyazaki, Y., Kozuki, I., Sakai, T., Hashimoto, H. & Takada, J., 2011, In : Green Chemistry. 13, 11, p. 3187-3195 9 p.

Research output: Contribution to journalArticle

Lipases
Lipase
Iron oxides
iron oxide
immobilization