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Chemistry
Finland
2026

D-Index & Metrics

Discipline name D-Index World Ranking Current World Ranking National Ranking Current National Ranking Publications Citations
Chemistry 84 2762 2483 8 6 300 33930
Physics 80 3006 2856 12 12 268 25427

Pekka Pyykkö publications per year

The chart shows the history of publications by Pekka Pyykkö between 1965 and 2026, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. Pekka Pyykkö published across 62 years, from 1965 to 2026, averaging 6.3 papers a year. Output peaked at 25 publications in 2000. 5 of the 389 publications appeared in the last two years.

No. of publications
5 10 15 20 25
Bar chart. Horizontal axis: year, 1965 to 2026. Vertical axis: number of publications, 0 to 25. Peak 25 publications in 2000. 1965: 2 publications 1966: 3 publications 1967: 2 publications 1968: 2 publications 1969: 0 publications 1970: 2 publications 1971: 2 publications 1972: 2 publications 1973: 4 publications 1974: 1 publication 1975: 3 publications 1976: 4 publications 1977: 5 publications 1978: 3 publications 1979: 9 publications 1980: 7 publications 1981: 7 publications 1982: 6 publications 1983: 5 publications 1984: 6 publications 1985: 3 publications 1986: 9 publications 1987: 7 publications 1988: 6 publications 1989: 6 publications 1990: 6 publications 1991: 13 publications 1992: 3 publications 1993: 15 publications 1994: 3 publications 1995: 4 publications 1996: 4 publications 1997: 12 publications 1998: 13 publications 1999: 8 publications 2000: 25 publications 2001: 12 publications 2002: 11 publications 2003: 10 publications 2004: 15 publications 2005: 10 publications 2006: 9 publications 2007: 9 publications 2008: 13 publications 2009: 14 publications 2010: 8 publications 2011: 10 publications 2012: 8 publications 2013: 3 publications 2014: 9 publications 2015: 6 publications 2016: 2 publications 2017: 3 publications 2018: 5 publications 2019: 1 publication 2020: 4 publications 2021: 3 publications 2022: 1 publication 2023: 4 publications 2024: 2 publications 2025: 4 publications 2026: 1 publication
1965 2026

389 publications in total across all disciplines

View publications per year as a table
Pekka Pyykkö: publications per year, 1965 to 2026
Year Publications
1965 2
1966 3
1967 2
1968 2
1969 0
1970 2
1971 2
1972 2
1973 4
1974 1
1975 3
1976 4
1977 5
1978 3
1979 9
1980 7
1981 7
1982 6
1983 5
1984 6
1985 3
1986 9
1987 7
1988 6
1989 6
1990 6
1991 13
1992 3
1993 15
1994 3
1995 4
1996 4
1997 12
1998 13
1999 8
2000 25
2001 12
2002 11
2003 10
2004 15
2005 10
2006 9
2007 9
2008 13
2009 14
2010 8
2011 10
2012 8
2013 3
2014 9
2015 6
2016 2
2017 3
2018 5
2019 1
2020 4
2021 3
2022 1
2023 4
2024 2
2025 4
2026 1
Total 389
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Pekka Pyykkö 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 Pekka Pyykkö 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, 281–300 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: 300 publications — 63rd percentile

63% 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
281–300 939 300
301–320 764
321–340 643
341–360 628
361–380 522
381–400 459
401–420 397
421–440 327
441–460 270
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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Pekka Pyykkö 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 Pekka Pyykkö 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, 84–85 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: 84 D-Index — 85th percentile

85% 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
70–71 646
72–73 561
74–75 501
76–77 437
78–79 388
80–81 354
82–83 292
84–85 275 84
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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Research.com Recognitions

  • 2026 - Research.com Chemistry in Finland Leader Award
  • 2025 - Research.com Chemistry in Finland Leader Award
  • 2022 - Research.com Chemistry in Finland Leader Award
  • 2007 - Member of Academia Europaea

Overview

Pekka Pyykkö is affiliated with the University of Helsinki in Finland and has contributed extensively to the fields of chemistry and physics. Their research encompasses a range of topics primarily rooted in atomic and molecular physics as well as physical and theoretical chemistry.

Their recent publications cover several key areas and include:

  • The periodic table and the physics that drives it, 2020, Nature Reviews Chemistry
  • Understanding the Uniqueness of 2p Elements in Periodic Tables, 2020, Chemistry - A European Journal
  • Structural trends in atomic nuclei from laser spectroscopy of tin, 2020, Communications Physics
  • Determining nuclear quadrupole moments of Bi and Sb from molecular data, 2023, Physical Chemistry Chemical Physics
  • Ab initio electronic factors of the A and B hyperfine structure constants for the 5s25p6s P1o,3 states in Sn i, 2021, Physical Review A

Frequent coauthors collaborating with Pekka Pyykkö include:

  • Z. B. Wang
  • Han-Shi Hu
  • László von Szentpály
  • Hermann Stoll
  • S. Fritzsche

Key publication venues where Pekka Pyykkö's work has appeared multiple times include:

  • Chemistry - A European Journal
  • Physical Chemistry Chemical Physics
  • Inorganic Chemistry
  • Nature Reviews Chemistry
  • Communications Physics

The research fields emphasized by Pekka Pyykkö comprise:

  • Chemistry
  • Physics and Astronomy

The primary subfields of study in their work are:

  • Atomic and Molecular Physics, and Optics
  • Physical and Theoretical Chemistry
  • Organic Chemistry
  • Nuclear and High Energy Physics
  • Spectroscopy

The main research topics explored in the publications include:

  • Advanced Chemical Physics Studies
  • Nuclear physics research studies
  • Atomic and Molecular Physics
  • History and advancements in chemistry
  • Advanced NMR Techniques and Applications
  • Crystallography and molecular interactions
  • Inorganic Fluorides and Related Compounds

Pekka Pyykkö has been recognized as a Member of Academia Europaea since 2007.

Best Publications

  • Relativistic effects in structural chemistry

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  • Strong Closed-Shell Interactions in Inorganic Chemistry

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  • Molecular Single‐Bond Covalent Radii for Elements 1–118

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  • Theoretical Chemistry of Gold

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  • Molecular Double-Bond Covalent Radii for Elements Li–E112

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  • Embedding transition-metal atoms in graphene: structure, bonding, and magnetism

    A. V. Krasheninnikov;A. V. Krasheninnikov;P. O. Lehtinen;Adam S. Foster;Adam S. Foster;P. Pyykkö

  • Relativity and the periodic system of elements

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  • Additive Covalent Radii for Single-, Double-, and Triple-Bonded Molecules and Tetrahedrally Bonded Crystals: A Summary

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  • Theoretical chemistry of gold. III

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  • Relativistic Effects in Chemistry: More Common Than You Thought

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  • Year-2008 nuclear quadrupole moments

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  • Theory of the d<sup>10</sup>–d<sup>10</sup> Closed‐Shell Attraction: 1. Dimers Near Equilibrium

    Unknown

  • Triple-Bond Covalent Radii

    Unknown

  • Molecular tweezers for hydrogen: synthesis, characterization, and reactivity.

    Victor Sumerin;Felix Schulz;Michiko Atsumi;Cong Wang

  • Theoretical chemistry of gold. II

    Unknown

  • Relativistic Quantum Chemistry

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  • Theoretische Chemie des Golds

    Pekka Pyykkö

  • Cationic Gold(I) Complexes of Xenon and of Ligands Containing the Donor Atoms Oxygen, Nitrogen, Phosphorus, and Sulfur †

    Detlef Schröder;Helmut Schwarz;and Jan Hrušák;Pekka Pyykkö

  • Icosahedral WAu12: A Predicted Closed-Shell Species, Stabilized by Aurophilic Attraction and Relativity and in Accord with the 18-Electron Rule This work was supported by The Academy of Finland. The computations were carried out at CSC, Espoo, Finland.

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  • How Do Spin–Orbit-Induced Heavy-Atom Effects on NMR Chemical Shifts Function? Validation of a Simple Analogy to Spin–Spin Coupling by Density Functional Theory (DFT) Calculations on Some Iodo Compounds

    Martin Kaupp;Olga L. Malkina;Vladimir G. Malkin;Pekka Pyykkö

  • Fully numerical hartree-fock methods for molecules

    Leif Laaksonen;Pekka Pyykkö;Dage Sundholm

  • Theory of d10−d10 Closed-Shell Attraction. III. Rings

    Pekka Pyykkö;Fernando Mendizabal

  • Relativity, gold, closed-shell interactions, and CsAu.NH3.

    Pekka Pyykkö

  • Theory of the d10–d10 Closed-Shell Attraction: 2. Long-Distance Behaviour and Nonadditive Effects in Dimers and Trimers of Type [(x-Au-L)n] (n = 2, 3; X = Cl, I, H; L = PH3, PMe3, -N≡CH)†

    Pekka Pyykkö;Fernando Mendizabal

  • Ab initio studies of the dimers (HgH2)2 and (HgMe2)2. Metallophilic attraction and the van der Waals radii of mercury

    Pekka Pyykkö;Michal Straka

  • A transparent interpretation of the relativistic contribution to the N.M.R. ‘heavy atom chemical shift’

    Pekka Pyykkö;Andreas Görling;Notker Rösch

  • Understanding the eighteen-electron rule

    Pekka Pyykkö

  • Lithium-7, silicon-29, tin-119, and lead-207 NMR studies of phenyl-substituted Group 4 anions

    Ulf Edlund;Tore Lejon;Pekka Pyykko;T. K. Venkatachalam

  • Two-dimensional, fully numerical molecular calculations

    Dage Sundholm;Pekka Pyykkö;Leif Laaksonen

  • Matrix Infrared Spectroscopic and ab Initio Studies of ZnH2, CdH2, and Related Metal Hydride Species

    Tim M. Greene;Wendy Brown;Lester Andrews;Anthony J. Downs

  • Relativistic, nearly basis-set-limit nuclear magnetic shielding constants of the rare gases He-Rn: A way to absolute nuclear magnetic resonance shielding scales

    Juha Vaara;Pekka Pyykkö

  • Ab Initio Interpretation of the Closed-Shell Intermolecular E.cntdot..cntdot..cntdot.E Attraction in Dipnicogen (H2E-EH2)2 and Dichalcogen (HE-EH)2 Hydride Model Dimers

    Karl Wilhelm Klinkhammer;Pekka Pyykko

  • A predicted organometallic series following a 32-electron principle: An@C28 (An = Th, Pa+, U2+, Pu4+).

    Jean-Pierre Dognon;Carine Clavaguéra;Pekka Pyykkö

  • Trends in inversion barriers. I. Group‐15 hydrides

    Peter Schwerdtfeger;Liisa J. Laakkonen;Pekka Pyykkö

  • Ab‐initio‐Rechnungen am Dimer (ClAuPH3)2 mit relativistischem Pseudopotential: Ist die „aurophile Attraktion”︁ ein Korrelationseffekt?

    Pekka Pyykkö;Yongfang Zhao

  • How many hydrogen atoms can be bound to a metal? Predicted MH12 species.

    Laura Gagliardi;Pekka Pyykkö

Frequent Co-Authors

Laura Gagliardi
Laura Gagliardi University of Chicago
Dage Sundholm
Dage Sundholm University of Helsinki
Andrzej J. Sadlej
Andrzej J. Sadlej Nicolaus Copernicus University
Peter Schwerdtfeger
Peter Schwerdtfeger Massey University
Antonio Laguna
Antonio Laguna University of Zaragoza
Hubert Schmidbaur
Hubert Schmidbaur Technical University of Munich
Björn O. Roos
Björn O. Roos Lund University
Geerd H. F. Diercksen
Geerd H. F. Diercksen Max Planck Society
Hans-Joachim Werner
Hans-Joachim Werner University of Stuttgart
Florian Müller-Plathe
Florian Müller-Plathe Technical University of Darmstadt

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