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Toshikazu Hirao

Toshikazu Hirao

D-Index & Metrics

Discipline name D-Index World Ranking Current World Ranking National Ranking Current National Ranking Publications Citations
Chemistry 69 6190 5616 394 369 457 16957

Toshikazu Hirao publications per year

The chart shows the history of publications by Toshikazu Hirao between 1974 and 2024, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. Toshikazu Hirao published across 51 years, from 1974 to 2024, averaging 9 papers a year. Output peaked at 23 publications in 2001. 2 of the 460 publications appeared in the last two years.

No. of publications
5 10 15 20
Bar chart. Horizontal axis: year, 1974 to 2024. Vertical axis: number of publications, 0 to 23. Peak 23 publications in 2001. 1974: 3 publications 1975: 4 publications 1976: 0 publications 1977: 3 publications 1978: 3 publications 1979: 1 publication 1980: 2 publications 1981: 9 publications 1982: 5 publications 1983: 13 publications 1984: 5 publications 1985: 5 publications 1986: 11 publications 1987: 2 publications 1988: 2 publications 1989: 2 publications 1990: 6 publications 1991: 7 publications 1992: 3 publications 1993: 8 publications 1994: 8 publications 1995: 6 publications 1996: 17 publications 1997: 11 publications 1998: 20 publications 1999: 12 publications 2000: 8 publications 2001: 23 publications 2002: 12 publications 2003: 12 publications 2004: 12 publications 2005: 14 publications 2006: 15 publications 2007: 15 publications 2008: 8 publications 2009: 13 publications 2010: 23 publications 2011: 16 publications 2012: 18 publications 2013: 10 publications 2014: 18 publications 2015: 20 publications 2016: 9 publications 2017: 22 publications 2018: 1 publication 2019: 9 publications 2020: 6 publications 2021: 4 publications 2022: 2 publications 2023: 0 publications 2024: 2 publications
1974 2024

460 publications in total across all disciplines

View publications per year as a table
Toshikazu Hirao: publications per year, 1974 to 2024
Year Publications
1974 3
1975 4
1976 0
1977 3
1978 3
1979 1
1980 2
1981 9
1982 5
1983 13
1984 5
1985 5
1986 11
1987 2
1988 2
1989 2
1990 6
1991 7
1992 3
1993 8
1994 8
1995 6
1996 17
1997 11
1998 20
1999 12
2000 8
2001 23
2002 12
2003 12
2004 12
2005 14
2006 15
2007 15
2008 8
2009 13
2010 23
2011 16
2012 18
2013 10
2014 18
2015 20
2016 9
2017 22
2018 1
2019 9
2020 6
2021 4
2022 2
2023 0
2024 2
Total 460
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Toshikazu Hirao 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 Toshikazu Hirao 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: 457 publications — 85th percentile

85% 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
441–460 270 457
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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Toshikazu Hirao 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 Toshikazu Hirao 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, 68–69 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: 69 D-Index — 66th percentile

66% 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
60–61 882
62–63 834
64–65 731
66–67 775
68–69 683 69
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

Toshikazu Hirao is affiliated with Osaka University in Japan. Their research spans multiple areas within chemistry and materials science, focusing on organic chemistry, polymers, and applied materials chemistry. The work covers various specialized subfields, including organic chemistry, polymers and plastics, electrical and electronic engineering, materials chemistry, and process chemistry and technology.

The primary research topics addressed in Hirao's publications include:

  • Conducting polymers and applications
  • Catalytic C-H functionalization methods
  • Carbon dioxide utilization in catalysis
  • CO2 reduction techniques and catalysts
  • Oxidative organic chemistry reactions
  • Alkaloids: synthesis and pharmacology
  • Synthesis and properties of aromatic compounds

Hirao has published in several scientific journals, with frequent appearances in:

  • RSC Advances
  • Chemical Communications
  • Organometallics
  • Bulletin of the Chemical Society of Japan
  • Japanese Journal of Applied Physics

Recent papers authored or coauthored by Hirao include:

  • "Oxovanadium(v)-catalyzed oxidative cross-coupling of enolates using O2 as a terminal oxidant," 2020, Chemical Communications
  • "Structural Consequences of Two-Fold Deprotonation of Sumanene: Embedding Two Cp-rings into a Nonplanar Carbon Framework," 2021, Organometallics
  • "Oxovanadium(v)-catalyzed amination of carbon dioxide under ambient pressure for the synthesis of ureas," 2021, RSC Advances
  • "Synthesis of Self-Doped Conductive Poly(3,4-ethylenedioxythiophene) (PEDOT) Bearing Phosphonic Acid Moieties," 2022, Bulletin of the Chemical Society of Japan
  • "Self-doped conducting polyaniline bearing phosphonic acid as a hole transport layer in organic photovoltaics," 2024, Japanese Journal of Applied Physics

Collaboration forms a notable part of Hirao's research activity. Frequent coauthors include:

  • Toru Amaya
  • Mamoru Tobisu
  • Masato Daijo
  • Kahori Kiriyama
  • Yuhi Inada

Best Publications

  • Synthesis of .alpha.,.beta.-unsaturated carbonyl compounds by palladium(II)-catalyzed dehydrosilylation of silyl enol ethers

    Unknown

  • A Synthesis of Sumanene, a Fullerene Fragment

    Hidehiro Sakurai;Taro Daiko;Toshikazu Hirao

  • PALLADIUM-CATALYZED NEW CARBON-PHOSPHORUS BOND FORMATION

    T. Hirao;T. Masunaga;N. Yamada;Y. Ohshiro

  • Vanadium in Modern Organic Synthesis

    Toshikazu Hirao

  • A NOVEL SYNTHESIS OF DIALKYL ARENEPHOSPHONATES

    Toshikazu Hirao;Toshio Masunaga;Yoshiki Ohshiro;Toshio Agawa

  • HIGHLY REGIO- AND STEREOCONTROLLED SYNTHESIS OF VINYL SULFIDES VIA TRANSITION-METAL-CATALYZED HYDROTHIOLATION OF ALKYNES WITH THIOLS

    Akiya Ogawa;Takuma Ikeda;Kouichi Kimura;Toshikazu Hirao

  • Structural elucidation of sumanene and generation of its benzylic anions.

    Hidehiro Sakurai;Taro Daiko;Hiroyuki Sakane;Toru Amaya

  • Stereoselective synthesis of vinylphosphonate

    Toshikazu Hirao;Toshio Masunaga;Yoshiki Ohshiro;Toshio Agawa

  • Pd/C as a reusable catalyst for the coupling reaction of halophenols and arylboronic acids in aqueous media.

    Hidehiro Sakurai;Tatsuya Tsukuda;Toshikazu Hirao

  • Chirality Organization of Ferrocenes Bearing Podand Dipeptide Chains: Synthesis and Structural Characterization

    Toshiyuki Moriuchi;Akihiro Nomoto;Kazuhiro Yoshida;and Akiya Ogawa

  • Anisotropic Electron Transport Properties in Sumanene Crystal

    Toru Amaya;Shu Seki;Toshiyuki Moriuchi;Kana Nakamoto

  • A molecular bowl sumanene

    Toru Amaya;Toshikazu Hirao

  • Design of Ferrocene-Dipeptide Bioorganometallic Conjugates To Induce Chirality-Organized Structures

    Toshiyuki Moriuchi;Toshikazu Hirao

  • Highly ordered structures of peptides by using molecular scaffolds.

    Toshiyuki Moriuchi;Toshikazu Hirao

  • Conjugated systems composed of transition metals and redox-active π-conjugated ligands

    Toshikazu Hirao

  • Surface-active properties of novel cationic surfactants with two alkyl chains and two ammonio groups

    Tae-Seong Kim;Toshiyuki Kida;Yohji Nakatsuji;Toshikazu Hirao

  • A highly ordered ferrocene system regulated by podand peptide chains

    Akihiro Nomoto;Toshiyuki Moriuchi;Shuhei Yamazaki;Akiya Ogawa

  • Redox Behavior of Polyaniline−Transition Metal Complexes in Solution

    Masayoshi Higuchi;Daisuke Imoda;Toshikazu Hirao

  • Interesting and effective P,N-chelation of tetrasubstituted ferrocene ligands for palladium-catalyzed asymmetric allylic substitution

    Wanbin Zhang;Toshikazu Hirao;Isao Ikeda

  • Highly diastereoselective ortho-lithiation of 1,1′-bis-(oxazolinyl)ferrocene directed to C2-symmetric chiral ligands

    Wanbin Zhang;Yoichi Adachi;Toshikazu Hirao;Isao Ikeda

  • A Novel Synthetic Metal Catalytic System

    Masayoshi Higuchi;Isao Ikeda;Toshikazu Hirao

  • Cyclization reactions via oxo-.pi.-allylpalladium(II) intermediates

    Yoshihiko Ito;Hirokazu Aoyama;Toshikazu Hirao;Akira Mochizuki

  • Bowl-to-bowl inversion of sumanene derivatives

    Toru Amaya;Hiroyuki Sakane;Toshiko Muneishi;Toshikazu Hirao

Frequent Co-Authors

Isao Ikeda
Isao Ikeda Osaka University
Ken-ichiro Hayashi
Ken-ichiro Hayashi Okayama University of Science
Hideo Kurosawa
Hideo Kurosawa Osaka University
Yoshihiko Ito
Yoshihiko Ito Kyoto University
Takeo Saegusa
Takeo Saegusa Kyoto University
Mamoru Tobisu
Mamoru Tobisu Osaka University
Akinori Saeki
Akinori Saeki Osaka University
Shu Seki
Shu Seki Kyoto University
Kentaro Yamaguchi
Kentaro Yamaguchi Tokushima Bunri University
Yoshinori Takashima
Yoshinori Takashima Osaka University

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