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D-Index & Metrics

Discipline name D-Index World Ranking Current World Ranking National Ranking Current National Ranking Publications Citations
Chemistry 59 10074 9111 718 660 446 13399

Takeji Takui publications per year

The chart shows the history of publications by Takeji Takui between 1973 and 2025, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. Takeji Takui published across 53 years, from 1973 to 2025, averaging 9 papers a year. Output peaked at 29 publications in 2001. 5 of the 477 publications appeared in the last two years.

No. of publications
5 10 15 20 25
Bar chart. Horizontal axis: year, 1973 to 2025. Vertical axis: number of publications, 0 to 29. Peak 29 publications in 2001. 1973: 1 publication 1974: 0 publications 1975: 2 publications 1976: 0 publications 1977: 0 publications 1978: 0 publications 1979: 0 publications 1980: 0 publications 1981: 0 publications 1982: 1 publication 1983: 2 publications 1984: 0 publications 1985: 2 publications 1986: 0 publications 1987: 2 publications 1988: 6 publications 1989: 5 publications 1990: 8 publications 1991: 0 publications 1992: 2 publications 1993: 11 publications 1994: 2 publications 1995: 14 publications 1996: 20 publications 1997: 26 publications 1998: 6 publications 1999: 27 publications 2000: 9 publications 2001: 29 publications 2002: 15 publications 2003: 25 publications 2004: 14 publications 2005: 22 publications 2006: 22 publications 2007: 17 publications 2008: 10 publications 2009: 13 publications 2010: 20 publications 2011: 20 publications 2012: 16 publications 2013: 10 publications 2014: 7 publications 2015: 3 publications 2016: 9 publications 2017: 8 publications 2018: 9 publications 2019: 10 publications 2020: 5 publications 2021: 14 publications 2022: 21 publications 2023: 7 publications 2024: 0 publications 2025: 5 publications
1973 2025

477 publications in total across all disciplines

View publications per year as a table
Takeji Takui: publications per year, 1973 to 2025
Year Publications
1973 1
1974 0
1975 2
1976 0
1977 0
1978 0
1979 0
1980 0
1981 0
1982 1
1983 2
1984 0
1985 2
1986 0
1987 2
1988 6
1989 5
1990 8
1991 0
1992 2
1993 11
1994 2
1995 14
1996 20
1997 26
1998 6
1999 27
2000 9
2001 29
2002 15
2003 25
2004 14
2005 22
2006 22
2007 17
2008 10
2009 13
2010 20
2011 20
2012 16
2013 10
2014 7
2015 3
2016 9
2017 8
2018 9
2019 10
2020 5
2021 14
2022 21
2023 7
2024 0
2025 5
Total 477
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Takeji Takui 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 Takeji Takui sits on this spectrum.

No. of scientists
250 500 750 1,000 1,250
Bar chart with 63 bars. Horizontal axis: publications, 61–80 to 1,295+. Vertical axis: number of scientists, 0 to 1,350. Most scientists, 1,350, have 161–180 publications. The last bar groups every scientist with 1,295 publications or more. The highlighted bar, 441–460 publications, is where this scientist sits. 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
61–80 publications 1,295+

This scientist: 446 publications — 84th percentile

84% of scientists in this discipline score the same or lower.

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

View publications distribution as a table
Number of Chemistry scientists by publication count, Research.com 2026 ranking edition. Based on 17,934 ranked scientists.
Publications Scientists This scientist
61–80 66
81–100 302
101–120 623
121–140 918
141–160 1,218
161–180 1,350
181–200 1,344
201–220 1,281
221–240 1,216
241–260 1,100
261–280 979
281–300 939
301–320 764
321–340 643
341–360 628
361–380 522
381–400 459
401–420 397
421–440 327
441–460 270 446
461–480 265
481–500 252
501–520 201
521–540 185
541–560 148
561–580 148
581–600 132
601–620 114
621–640 104
641–660 91
661–680 92
681–700 73
701–720 57
721–740 54
741–760 67
761–780 45
781–800 46
801–820 39
821–840 32
841–860 36
861–880 29
881–900 26
901–920 24
921–940 14
941–960 23
961–980 28
981–1,000 15
1,001–1,020 29
1,021–1,040 12
1,041–1,060 19
1,061–1,080 12
1,081–1,100 6
1,101–1,120 8
1,121–1,140 12
1,141–1,160 5
1,161–1,180 6
1,181–1,200 14
1,201–1,220 7
1,221–1,240 2
1,241–1,260 6
1,261–1,280 4
1,281–1,294 6
1,295+ 100
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Takeji Takui 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 Takeji Takui sits on this spectrum.

No. of scientists
250 500 750 1,000
Bar chart with 61 bars. Horizontal axis: D-Index, 40–41 to 159+. Vertical axis: number of scientists, 0 to 1,051. Most scientists, 1,051, have 56–57 D-Index. The last bar groups every scientist with 159 D-Index or more. The highlighted bar, 58–59 D-Index, is where this scientist sits. 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
40–41 D-Index 159+

This scientist: 59 D-Index — 44th percentile

44% of scientists in this discipline score the same or lower.

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

View D-Index distribution as a table
Number of Chemistry scientists by D-index, Research.com 2026 ranking edition. Based on 17,934 ranked scientists.
D-Index Scientists This scientist
40–41 289
42–43 612
44–45 808
46–47 776
48–49 835
50–51 861
52–53 872
54–55 933
56–57 1,051
58–59 930 59
60–61 882
62–63 834
64–65 731
66–67 775
68–69 683
70–71 646
72–73 561
74–75 501
76–77 437
78–79 388
80–81 354
82–83 292
84–85 275
86–87 254
88–89 235
90–91 185
92–93 192
94–95 155
96–97 163
98–99 125
100–101 105
102–103 105
104–105 112
106–107 88
108–109 68
110–111 69
112–113 65
114–115 79
116–117 61
118–119 44
120–121 37
122–123 40
124–125 33
126–127 26
128–129 34
130–131 35
132–133 25
134–135 27
136–137 17
138–139 16
140–141 20
142–143 20
144–145 15
146–147 9
148–149 9
150–151 16
152–153 11
154–155 9
156–157 3
158 3
159+ 98
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Overview

Takeji Takui is affiliated with Osaka Metropolitan University in Japan and specializes in Materials Science. Their research predominantly focuses on Materials Chemistry, comprising the majority of their publications, along with significant work in Organic Chemistry, Electronic, Optical and Magnetic Materials, Artificial Intelligence, and Atomic and Molecular Physics and Optics.

Their scientific contributions cover a range of topics including crystallization and solubility studies, X-ray diffraction in crystallography, magnetism in coordination complexes, synthesis and properties of aromatic compounds, electron spin resonance studies, quantum information and cryptography, and quantum and electron transport phenomena.

Takui has published numerous papers, with some recent notable works being:

  • Bis-periazulene (Cycloheptadeffluorene) as a Nonalternant Isomer of Pyrene: Synthesis and Characterization of Its Triaryl Derivatives, 2022, Journal of the American Chemical Society
  • Synthesis and Isolation of a Kekulé Hydrocarbon with a Triplet Ground State, 2022, Angewandte Chemie International Edition
  • A Kinetically Stabilized Nitrogen-Doped Triangulene Cation: Stable and NIR Fluorescent Diradical Cation with Triplet Ground State, 2023, Angewandte Chemie International Edition
  • Bayesian phase difference estimation: a general quantum algorithm for the direct calculation of energy gaps, 2021, Physical Chemistry Chemical Physics
  • Adiabatic state preparation of correlated wave functions with nonlinear scheduling functions and broken-symmetry wave functions, 2022, Communications Chemistry

The frequent publication venues in which Takui's work appears include:

  • The Cambridge Structural Database
  • Applied Magnetic Resonance
  • Angewandte Chemie International Edition
  • The Journal of Physical Chemistry Letters
  • Chemistry - A European Journal

They have collaborated extensively with coauthors such as Kazunobu Sato, Daisuke Shiomi, Kenji Sugisaki, Shuichi Suzuki, and Masatoshi Kozaki, with collaboration counts varying from over 20 to more than 60 joint works.

Best Publications

  • Synthetic organic spin chemistry for structurally well-defined open-shell graphene fragments

    Yasushi Morita;Shuichi Suzuki;Kazunobu Sato;Takeji Takui

  • Organic tailored batteries materials using stable open-shell molecules with degenerate frontier orbitals

    Yasushi Morita;Shinsuke Nishida;Shinsuke Nishida;Tsuyoshi Murata;Miki Moriguchi

  • A Stable Neutral Hydrocarbon Radical: Synthesis, Crystal Structure, and Physical Properties of 2,5,8-Tri-tert-butyl-phenalenyl

    Kosaburo Goto;Takashi Kubo;Kagetoshi Yamamoto;Kazuhiro Nakasuji

  • Synthesis, intermolecular interaction, and semiconductive behavior of a delocalized singlet biradical hydrocarbon.

    Takashi Kubo;Akihiro Shimizu;Maki Sakamoto;Mikio Uruichi

  • Synthesis and Characterization of Teranthene: A Singlet Biradical Polycyclic Aromatic Hydrocarbon Having Kekulé Structures

    Akihito Konishi;Yasukazu Hirao;Masayoshi Nakano;Akihiro Shimizu

  • Indeno[2,1‐b]fluorene: A 20‐π‐Electron Hydrocarbon with Very Low‐Energy Light Absorption

    Akihiro Shimizu;Ryohei Kishi;Masayoshi Nakano;Daisuke Shiomi

  • Aromaticity on the pancake-bonded dimer of neutral phenalenyl radical as studied by MS and NMR spectroscopies and NICS analysis.

    Shuichi Suzuki;Yasushi Morita;Kozo Fukui;Kazunobu Sato

  • Thermochromism in an organic crystal based on the coexistence of sigma- and pi-dimers.

    Yasushi Morita;Yasushi Morita;Shuichi Suzuki;Kozo Fukui;Shigeaki Nakazawa

  • A New Trend in Phenalenyl Chemistry: A Persistent Neutral Radical, 2,5,8‐Tri‐tert‐butyl‐1,3‐diazaphenalenyl, and the Excited Triplet State of the Gable syn‐Dimer in the Crystal of Column Motif

    Yasushi Morita;Takashi Aoki;Kozo Fukui;Shigeaki Nakazawa

  • Preparation and ESR detection of a ground-state nonet hydrocarbon as a model for one-dimensional organic ferromagnets.

    Yoshio. Teki;Takeji. Takui;Koichi. Itoh;Hiizu. Iwamura

  • Alternating covalent bonding interactions in a one-dimensional chain of a phenalenyl-based singlet biradical molecule having Kekulé structures.

    Akihiro Shimizu;Takashi Kubo;Mikio Uruichi;Kyuya Yakushi

  • The first detection of a Clar's hydrocarbon, 2,6,10-tri-tert-butyltriangulene: a ground-state triplet of non-Kekulé polynuclear benzenoid hydrocarbon.

    Jun Inoue;Kozo Fukui;Takashi Kubo;Shigeaki Nakazawa

  • Mononuclear Copper(II)−Superoxo Complexes that Mimic the Structure and Reactivity of the Active Centers of PHM and DβM

    Atsushi Kunishita;Minoru Kubo;Hideki Sugimoto;Takashi Ogura

  • Singlet Biradical Character of Phenalenyl-Based Kekulé Hydrocarbon with Naphthoquinoid Structure

    Takashi Kubo;Akihiro Shimizu;Mikio Uruichi;Kyuya Yakushi

  • Design, preparation, and electron spin resonance detection of a ground-state undecet (S=5) hydrocarbon

    Ikuo Fujita;Yoshio Teki;Takeji Takui;Takamasa Kinoshita

  • A Synthetic Two‐Spin Quantum Bit: g‐Engineered Exchange‐Coupled Biradical Designed for Controlled‐NOT Gate Operations

    Shigeaki Nakazawa;Shinsuke Nishida;Tomoaki Ise;Tomohiro Yoshino

  • Polycationic High-Spin States of One- and Two-Dimensional (Diarylamino)benzenes, Prototypical Model Units for Purely Organic Ferromagnetic Metals As Studied by Pulsed ESR/Electron Spin Transient Nutation Spectroscopy

    Kazunobu Sato;Masafumi Yano;Mutsuo Furuichi;Daisuke Shiomi

  • Molecular electron-spin quantum computers and quantum information processing: pulse-based electron magnetic resonance spin technology applied to matter spin-qubits

    Kazunobu Sato;Shigeaki Nakazawa;Robabeh Rahimi;Tomoaki Ise

  • Four‐Stage Amphoteric Redox Properties and Biradicaloid Character of Tetra‐tert‐butyldicyclopenta[b;d]thieno[1,2,3‐cd;5,6,7‐c′d′]diphenalene

    Takashi Kubo;Maki Sakamoto;Minako Akabane;Yoshinori Fujiwara

  • Spin transfer and solvato-/thermochromism induced by intramolecular electron transfer in a purely organic open-shell system.

    Shinsuke Nishida;Yasushi Morita;Yasushi Morita;Kozo Fukui;Kazunobu Sato

Frequent Co-Authors

Kazunobu Sato
Kazunobu Sato Osaka Metropolitan University
Daisuke Shiomi
Daisuke Shiomi Osaka Metropolitan University
Yasushi Morita
Yasushi Morita Aichi Institute of Technology
Kazuhiro Nakasuji
Kazuhiro Nakasuji Osaka University
Takashi Kubo
Takashi Kubo Osaka University
Akihiro Shimizu
Akihiro Shimizu Osaka University
Munetaka Oyama
Munetaka Oyama Kyoto University
Masayoshi Nakano
Masayoshi Nakano Osaka University
Kizashi Yamaguchi
Kizashi Yamaguchi Osaka University
Ken Hirotsu
Ken Hirotsu Osaka Metropolitan University

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