World's Best Scientists 2026 revealed!

D-Index & Metrics

Chemistry

D-Index
58
Citations
10499
World Ranking
10761
National Ranking
787

Tadashi Ema publication distribution in Chemistry in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Chemistry in 2026. The highlighted bar marks where Tadashi Ema sits on this spectrum.

61–80 publications: 66 scientists 81–100 publications: 302 scientists 101–120 publications: 623 scientists 121–140 publications: 918 scientists 141–160 publications: 1,218 scientists 161–180 publications: 1,350 scientists 181–200 publications: 1,344 scientists 201–220 publications: 1,281 scientists 221–240 publications: 1,216 scientists 241–260 publications: 1,100 scientists 261–280 publications: 979 scientists 281–300 publications: 939 scientists 301–320 publications: 764 scientists 321–340 publications: 643 scientists 341–360 publications: 628 scientists 361–380 publications: 522 scientists 381–400 publications: 459 scientists 401–420 publications: 397 scientists 421–440 publications: 327 scientists 441–460 publications: 270 scientists 461–480 publications: 265 scientists 481–500 publications: 252 scientists 501–520 publications: 201 scientists 521–540 publications: 185 scientists 541–560 publications: 148 scientists 561–580 publications: 148 scientists 581–600 publications: 132 scientists 601–620 publications: 114 scientists 621–640 publications: 104 scientists 641–660 publications: 91 scientists 661–680 publications: 92 scientists 681–700 publications: 73 scientists 701–720 publications: 57 scientists 721–740 publications: 54 scientists 741–760 publications: 67 scientists 761–780 publications: 45 scientists 781–800 publications: 46 scientists 801–820 publications: 39 scientists 821–840 publications: 32 scientists 841–860 publications: 36 scientists 861–880 publications: 29 scientists 881–900 publications: 26 scientists 901–920 publications: 24 scientists 921–940 publications: 14 scientists 941–960 publications: 23 scientists 961–980 publications: 28 scientists 981–1,000 publications: 15 scientists 1,001–1,020 publications: 29 scientists 1,021–1,040 publications: 12 scientists 1,041–1,060 publications: 19 scientists 1,061–1,080 publications: 12 scientists 1,081–1,100 publications: 6 scientists 1,101–1,120 publications: 8 scientists 1,121–1,140 publications: 12 scientists 1,141–1,160 publications: 5 scientists 1,161–1,180 publications: 6 scientists 1,181–1,200 publications: 14 scientists 1,201–1,220 publications: 7 scientists 1,221–1,240 publications: 2 scientists 1,241–1,260 publications: 6 scientists 1,261–1,280 publications: 4 scientists 1,281–1,294 publications: 6 scientists 1,295+ publications: 100 scientists
61 publications 1,295+

This scientist: 180 publications — 25th percentile

25% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 1,295 publications or more.

Tadashi Ema D-index placement in Chemistry in 2026

The chart shows the D-index (discipline H-index) distribution of Chemistry scientists ranked by Research.com in 2026. The highlighted bar marks where Tadashi Ema sits on this spectrum.

40–41 D-Index: 289 scientists 42–43 D-Index: 612 scientists 44–45 D-Index: 808 scientists 46–47 D-Index: 776 scientists 48–49 D-Index: 835 scientists 50–51 D-Index: 861 scientists 52–53 D-Index: 872 scientists 54–55 D-Index: 933 scientists 56–57 D-Index: 1,051 scientists 58–59 D-Index: 930 scientists 60–61 D-Index: 882 scientists 62–63 D-Index: 834 scientists 64–65 D-Index: 731 scientists 66–67 D-Index: 775 scientists 68–69 D-Index: 683 scientists 70–71 D-Index: 646 scientists 72–73 D-Index: 561 scientists 74–75 D-Index: 501 scientists 76–77 D-Index: 437 scientists 78–79 D-Index: 388 scientists 80–81 D-Index: 354 scientists 82–83 D-Index: 292 scientists 84–85 D-Index: 275 scientists 86–87 D-Index: 254 scientists 88–89 D-Index: 235 scientists 90–91 D-Index: 185 scientists 92–93 D-Index: 192 scientists 94–95 D-Index: 155 scientists 96–97 D-Index: 163 scientists 98–99 D-Index: 125 scientists 100–101 D-Index: 105 scientists 102–103 D-Index: 105 scientists 104–105 D-Index: 112 scientists 106–107 D-Index: 88 scientists 108–109 D-Index: 68 scientists 110–111 D-Index: 69 scientists 112–113 D-Index: 65 scientists 114–115 D-Index: 79 scientists 116–117 D-Index: 61 scientists 118–119 D-Index: 44 scientists 120–121 D-Index: 37 scientists 122–123 D-Index: 40 scientists 124–125 D-Index: 33 scientists 126–127 D-Index: 26 scientists 128–129 D-Index: 34 scientists 130–131 D-Index: 35 scientists 132–133 D-Index: 25 scientists 134–135 D-Index: 27 scientists 136–137 D-Index: 17 scientists 138–139 D-Index: 16 scientists 140–141 D-Index: 20 scientists 142–143 D-Index: 20 scientists 144–145 D-Index: 15 scientists 146–147 D-Index: 9 scientists 148–149 D-Index: 9 scientists 150–151 D-Index: 16 scientists 152–153 D-Index: 11 scientists 154–155 D-Index: 9 scientists 156–157 D-Index: 3 scientists 158 D-Index: 3 scientists 159+ D-Index: 98 scientists
40 D-Index 159+

This scientist: 58 D-Index — 42nd percentile

42% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 159 D-Index or more.

Overview

Tadashi Ema is affiliated with Okayama University in Japan and has a research focus spanning materials science and chemistry. Their research contributions emphasize the intersection of materials chemistry and organic chemistry, with notable engagement in process chemistry and sustainability topics.

Their research encompasses a number of specialized subfields including:

  • Materials Chemistry
  • Organic Chemistry
  • Process Chemistry and Technology
  • Renewable Energy, Sustainability and the Environment
  • Inorganic Chemistry

Tadashi Ema's work has contributed to several main thematic topics such as:

  • Crystallization and Solubility Studies
  • X-ray Diffraction in Crystallography
  • Synthesis and Properties of Aromatic Compounds
  • Carbon dioxide utilization in catalysis
  • Luminescence and Fluorescent Materials
  • CO2 Reduction Techniques and Catalysts
  • Asymmetric Hydrogenation and Catalysis

The scientist has authored papers published in key venues including:

  • The Cambridge Structural Database
  • Chemistry - A European Journal
  • Angewandte Chemie International Edition
  • Angewandte Chemie
  • Chemical Communications

Notable recent papers include:

  • Solvent-Induced Sign Inversion of Circularly Polarized Luminescence: Control of Excimer Chirality by Hydrogen Bonding, 2020, Journal of the American Chemical Society
  • Azahelicene-Fused BODIPY Analogues Showing Circularly Polarized Luminescence, 2020, Angewandte Chemie International Edition
  • Binaphthyl-Bridged Pyrenophanes: Intense Circularly Polarized Luminescence Based on a D2Symmetry Strategy, 2022, Angewandte Chemie International Edition
  • Aluminum porphyrins with quaternary ammonium halides as catalysts for copolymerization of cyclohexene oxide and CO2: metal-ligand cooperative catalysis, 2020, Chemical Science
  • Circularly Polarized Luminescence Liquids Based on Siloxybinaphthyls: Best Binaphthyl Dihedral Angle in the Excited State, 2021, Angewandte Chemie International Edition

Frequent coauthors collaborating with Tadashi Ema include:

  • Chihiro Maeda
  • Kazuto Takaishi
  • Shuichi Nomoto
  • Koki Akiyama
  • Keiji Nagahata

Best Publications

  • Recent progress in catalytic conversions of carbon dioxide

    Chihiro Maeda;Yuki Miyazaki;Tadashi Ema

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

    Tadashi Ema;Yuki Miyazaki;Junta Shimonishi;Chihiro Maeda

  • Bifunctional catalysts based on m-phenylene-bridged porphyrin dimer and trimer platforms: synthesis of cyclic carbonates from carbon dioxide and epoxides.

    Chihiro Maeda;Tomoya Taniguchi;Kanae Ogawa;Tadashi Ema

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

    Tadashi Ema;Yuki Miyazaki;Shohei Koyama;Yuya Yano

  • Ruffling in a Series of Nickel(II) meso-Tetrasubstituted Porphyrins as a Model for the Conserved Ruffling of the Heme of Cytochromes c.

    W. Jentzen;M. C. Simpson;J. D. Hobbs;X. Song;X. Song

  • Solvent-Induced Sign Inversion of Circularly Polarized Luminescence: Control of Excimer Chirality by Hydrogen Bonding

    Kazuto Takaishi;Kazuhiro Iwachido;Tadashi Ema

  • Binaphthyl-Bipyridyl Cyclic Dyads as a Chiroptical Switch.

    Kazuto Takaishi;Makoto Yasui;Tadashi Ema

  • Highly active and robust organic–inorganic hybrid catalyst for the synthesis of cyclic carbonates from carbon dioxide and epoxides

    Takashi Sakai;Yoshihiro Tsutsumi;Tadashi Ema

  • Versatile and Practical Macrocyclic Reagent with Multiple Hydrogen-Bonding Sites for Chiral Discrimination in NMR

    Tadashi Ema;Daisuke Tanida;Takashi Sakai

  • Bifunctional Organocatalyst for Activation of Carbon Dioxide and Epoxide To Produce Cyclic Carbonate: Betaine as a New Catalytic Motif

    Yoshihiro Tsutsumi;Kyohei Yamakawa;Masahiko Yoshida;Tadashi Ema

  • Evolving Fluorophores into Circularly Polarized Luminophores with a Chiral Naphthalene Tetramer: Proposal of Excimer Chirality Rule for Circularly Polarized Luminescence.

    Kazuto Takaishi;Kazuhiro Iwachido;Ryosuke Takehana;Masanobu Uchiyama;Masanobu Uchiyama

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

    Chihiro Maeda;Junta Shimonishi;Ray Miyazaki;Jun Ya Hasegawa

  • 5,10,15,20‐Tetra‐tert‐butylporphyrin and Its Remarkable Reactivity in the 5‐ and 15‐Positions

    Tadashi Ema;Mathias O. Senge;Nora Y. Nelson;Hisanobu Ogoshi

  • Suzuki-Miyaura coupling reaction using pentafluorophenylboronic acid.

    Toshinobu Korenaga;Takahiro Kosaki;Rokki Fukumura;Tadashi Ema

  • Design and Synthesis of a Trifunctional Chiral Porphyrin with C2 Symmetry as a Chiral Recognition Host for Amino Acid Esters

    Tadashi Mizutani;Tadashi Ema;Takashi Tomita;Yasuhisa Kuroda

  • Azahelicene-Fused BODIPY Analogues Showing Circularly Polarized Luminescence

    Chihiro Maeda;Keiji Nagahata;Takuma Shirakawa;Tadashi Ema

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

    Tadashi Ema;Kazuki Fukuhara;Takashi Sakai;Masaki Ohbo

  • Enhancement of the Enantioselectivity in Lipase-Catalyzed Kinetic Resolutions of 3-Phenyl-2H-azirine-2-methanol by Lowering the Temperature to −40 °C

    Takashi Sakai;Isamu Kawabata;Tetsuo Kishimoto;Tadashi Ema

  • Highly Efficient Chemoenzymatic Synthesis of Methyl (R)-o-Chloromandelate, a Key Intermediate for Clopidogrel, via Asymmetric Reduction with Recombinant Escherichia coli

    Tadashi Ema;Sayaka Ide;Nobuyasu Okita;Takashi Sakai

  • Unusual picosecond 1(π, π∗) deactivation of ruffled nonplanar porphyrins

    Steve Gentemann;Craig J. Medforth;Tadashi Ema;Tadashi Ema;Nora Y. Nelson

  • Recognition of α-Amino Acid Esters by Zinc Porphyrin Derivatives via Coordination and Hydrogen Bonding Interactions. Evidence for Two-Point Fixation from Thermodynamic and Induced Circular Dichroism Spectroscopic Studies

    Tadashi Mizutani;Tadashi Ema;Takashi Yoshida;Yasuhisa Kuroda

Frequent Co-Authors

Hisanobu Ogoshi
Hisanobu Ogoshi Kyoto University
Jun-ya Hasegawa
Jun-ya Hasegawa Hokkaido University
Mathias O. Senge
Mathias O. Senge Trinity College Dublin
Kenji Uneyama
Kenji Uneyama Okayama University
Masanobu Uchiyama
Masanobu Uchiyama University of Tokyo
John A. Shelnutt
John A. Shelnutt University of Georgia
Hiroshi Nakatsuji
Hiroshi Nakatsuji Kyoto University
Seiji Suga
Seiji Suga Okayama University
Dongho Kim
Dongho Kim Yonsei University

If you think any of the details on this page are incorrect, let us know.

Report an issue

We appreciate your kind effort to assist us to improve this page, it would be helpful providing us with as much detail as possible in the text box below:

Related Online Degrees & Career Pathways

Studying Chemistry in the USA opens doors to diverse career paths beyond traditional laboratory roles. Many students explore specialized fields that blend chemistry knowledge with applied skills. For example, understanding different types of paralegal degrees can be valuable for those interested in legal aspects of chemical patents or regulatory issues.

Another promising route is pharmaceutical sales, where a strong chemistry background supports a career as a pharma sales rep. The role offers competitive salary prospects and opportunities to work closely with healthcare professionals, making it an attractive choice for chemistry graduates.

For those committed to healthcare, becoming a pharmacist is a natural extension of chemistry studies. Learning how to become a pharmacist involves rigorous training but leads to rewarding careers in medication management and patient care, oftentimes accompanied by high earning potential.

Chemistry graduates can also consider forensic science roles, such as autopsy technician jobs. These positions utilize chemical analysis skills in medical examiner offices, contributing vital knowledge to forensic investigations and legal processes.

Exploring these different types of paralegals, pharma sales rep salary, how to become a pharmacist salary, and autopsy technician jobs can guide chemistry students to informed decisions about their education and future careers.

Best Scientists Citing Tadashi Ema

Trending Scientists

Recently Published Articles