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Per E. M. Siegbahn

Per E. M. Siegbahn

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Chemistry
Sweden
2026

D-Index & Metrics

Chemistry

D-Index
110
Citations
44199
World Ranking
808
National Ranking
10

Per E. M. Siegbahn 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 Per E. M. Siegbahn 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: 522 publications — 90th percentile

90% of scientists in this discipline score the same or lower.

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

Per E. M. Siegbahn 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 Per E. M. Siegbahn 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: 110 D-Index — 96th percentile

96% of scientists in this discipline score the same or lower.

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

Research.com Recognitions

  • 2026 - Research.com Chemistry in Sweden Leader Award
  • 2025 - Research.com Chemistry in Sweden Leader Award
  • 2022 - Research.com Chemistry in Sweden Leader Award

Overview

Per E. M. Siegbahn is affiliated with Stockholm University in Sweden, with a research focus centered on energy and related chemical processes. Their work spans several specialized subfields including renewable energy, sustainability and the environment, catalysis, inorganic chemistry, molecular biology, and materials chemistry.

The scientist's research primarily addresses topics involving metalloenzymes and iron-sulfur proteins, ammonia synthesis and nitrogen reduction, metal-catalyzed oxygenation mechanisms, electrocatalysts for energy conversion, photosynthetic processes and mechanisms, hydrogen storage and materials, and CO2 reduction techniques and catalysts.

Among the recent papers authored or co-authored by Per E. M. Siegbahn are:

  • A quantum chemical approach for the mechanisms of redox-active metalloenzymes (2021, RSC Advances)
  • The Energetics of Hydrogen Molecule Oxidation in NiFe-hydrogenase (2020, ACS Catalysis)
  • Theoretical Study of O2 Reduction and Water Oxidation in Multicopper Oxidases (2020, The Journal of Physical Chemistry A)

Other relevant recent papers, authored by frequent coauthors, demonstrate overlapping research interests:

  • Harnessing Noninnocent Porphyrin Ligand to Circumvent Fe-Hydride Formation in the Selective Fe-Catalyzed CO2 Reduction in Aqueous Solution (2020, ACS Catalysis)
  • A Mechanism for Nitrogenase Including Loss of a Sulfide (2022, Chemistry - A European Journal)

Coauthors who have frequently collaborated with Per E. M. Siegbahn include Rong-Zhen Liao, Wenjie Wei, Xichen Li, Yaqiong Zhang, and Jiayi Chen.

Publication venues that feature Siegbahn's work repeatedly consist of The Journal of Physical Chemistry B, Physical Chemistry Chemical Physics, The Journal of Physical Chemistry A, Journal of Computational Chemistry, and ACS Catalysis.

Best Publications

  • The complete active space SCF (CASSCF) method in a Newton–Raphson formulation with application to the HNO molecule

    Per E. M. Siegbahn;Jan Almlöf;Anders Heiberg;Björn O. Roos

  • A Comparison of the Super-CI and the Newton-Raphson Scheme in the Complete Active Space SCF Method

    Per Siegbahn;Anders Heiberg;Björn Roos;Bernard Levy

  • Transition-metal systems in biochemistry studied by high-accuracy quantum chemical methods.

    Per E. M. Siegbahn;Margareta R. A. Blomberg

  • A new intermolecular interaction: unconventional hydrogen bonds with element-hydride bonds as proton acceptor.

    Robert H. Crabtree;Per E. M. Siegbahn;Odile Eisenstein;Arnold L. Rheingold

  • Hydration of Beryllium, Magnesium, Calcium, and Zinc Ions Using Density Functional Theory

    Maria Pavlov;Per E. M. Siegbahn;Magnus Sandström

  • Structures and energetics for O2 formation in photosystem II.

    Per E. M. Siegbahn

  • Study of the N−H···H−B Dihydrogen Bond Including the Crystal Structure of BH3NH3 by Neutron Diffraction

    Wim T. Klooster;Thomas F. Koetzle;Per E. M. Siegbahn;Thomas B. Richardson

  • Quantum chemical studies of mechanisms for metalloenzymes.

    Margareta R. A. Blomberg;Tomasz Borowski;Fahmi Himo;Rong-Zhen Liao

  • Unconventional Hydrogen Bonds: Intermolecular B-H.cntdot..cntdot..cntdot.H-N Interactions

    Thomas Richardson;Susan de Gala;Robert H. Crabtree;Per E. M. Siegbahn

  • An accurate three‐dimensional potential energy surface for H3

    Unknown

  • Gaussian basis sets for the first and second row atoms

    B. Roos;P. Siegbahn

  • Water oxidation mechanism in photosystem II, including oxidations, proton release pathways, O―O bond formation and O2 release ☆

    Per E.M. Siegbahn

  • Polarization Functions for First and Second Row Atoms in Gaussian Type MO-SCF Calculations

    B. Roos;P. Siegbahn

  • Computational studies of [NiFe] and [FeFe] hydrogenases.

    Per E. M. Siegbahn;Jesse W. Tye;Michael B. Hall

  • Generalizations of the direct CI method based on the graphical unitary group approach. II. Single and double replacements from any set of reference configurations

    Per E. M. Siegbahn

  • Modeling enzymatic reactions involving transition metals.

    Per E. M. Siegbahn;Tomasz Borowski

  • Recent developments of the quantum chemical cluster approach for modeling enzyme reactions

    Per E. M. Siegbahn;Fahmi Himo

  • A simple method for the evaluation of the second-order-perturbation energy from external double-excitations with a CASSCF reference wavefunction

    Björn O. Roos;Per Linse;Per E.M. Siegbahn;Margareta R.A. Blomberg

  • Quantum chemical studies of radical-containing enzymes.

    Fahmi Himo;Per E. M. Siegbahn

  • The quantum chemical cluster approach for modeling enzyme reactions

    Per E.M. Siegbahn;Fahmi Himo

  • Manganese Oxyl Radical Intermediates and O−O Bond Formation in Photosynthetic Oxygen Evolution and a Proposed Role for the Calcium Cofactor in Photosystem II

    Per E. M. Siegbahn;Robert H. Crabtree

Frequent Co-Authors

Margareta R. A. Blomberg
Margareta R. A. Blomberg Stockholm University
Ulf Wahlgren
Ulf Wahlgren Stockholm University
Lars G. M. Pettersson
Lars G. M. Pettersson Stockholm University
Robert H. Crabtree
Robert H. Crabtree Yale University
Fahmi Himo
Fahmi Himo Stockholm University
Björn Åkermark
Björn Åkermark Stockholm University
Jan Almlöf
Jan Almlöf University of Minnesota
Charles W. Bauschlicher
Charles W. Bauschlicher Ames Research Center
Peter R. Taylor
Peter R. Taylor Tianjin University
Astrid Gräslund
Astrid Gräslund Stockholm University

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