World's Best Scientists 2026 revealed!

D-Index & Metrics

Chemistry

D-Index
56
Citations
9616
World Ranking
11812
National Ranking
3180

Willem Siebrand 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 Willem Siebrand 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: 199 publications — 32nd percentile

32% of scientists in this discipline score the same or lower.

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

Willem Siebrand 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 Willem Siebrand 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: 56 D-Index — 36th percentile

36% 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

  • 1980 - Fellow of the Royal Society of Canada Academy of Science

Overview

Willem Siebrand is affiliated with the National Academies of Sciences, Engineering, and Medicine in the United States. Their academic profile reflects contributions recognized by the scientific community, including a notable award received in 1980: Fellowship of the Royal Society of Canada, designated by the Academy of Science. This distinction indicates a recognized standing within the broader field of scientific inquiry.

While there are no recorded recent papers, co-authors, or frequent publication venues associated with Willem Siebrand, the professional connection to the National Academies suggests engagement with interdisciplinary scientific collaboration and policy-oriented initiatives at a national level.

The specificity of fields of study, subfields, and main topics of research have not been documented in the available data, limiting detailed insight into the particular scientific domains of expertise. Similarly, there are no listed book publications that might provide additional perspective on the scholarly output or thematic focus areas.

The profile highlights the importance of institutional affiliation and an honorific distinction, which together imply a career involved with recognized scientific endeavors in North America within the institutional framework of the National Academies of Sciences, Engineering, and Medicine.

Best Publications

  • Laser Generation of Excitons and Fluorescence in Anthracene Crystals

    Unknown

  • Radiationless Transitions in Polyatomic Molecules. I. Calculation of Franck—Condon Factors

    Unknown

  • Radiationless Transitions in Polyatomic Molecules. II. Triplet-Ground-State Transitions in Aromatic Hydrocarbons

    Unknown

  • Spin–Orbit Coupling in Aromatic Hydrocarbons. Analysis of Nonradiative Transitions between Singlet and Triplet States in Benzene and Naphthalene

    Bryan R. Henry;Willem Siebrand

  • Model for the direct photo-isomerization of stilbene

    G. Orlandi;W. Siebrand

  • Theory of Intersystem Crossing in Aromatic Hydrocarbons

    V. Lawetz;G. Orlandi;W. Siebrand

  • Anharmonicity in Polyatomic Molecules. The CH‐Stretching Overtone Spectrum of Benzene

    Bryan R. Henry;Willem Siebrand

  • Radiationless Transitions in Polyatomic Molecules. III. Anharmonicity, Isotope Effects, and Singlet-to-Ground-State Transitions in Aromatic Hydrocarbons

    Unknown

  • Theory of vibronic intensity borrowing. Comparison of Herzberg‐Teller and Born‐Oppenheimer coupling

    Unknown

  • Franck–Condon effects in resonance Raman spectra and excitation profiles

    Willem Siebrand;Marek Z. Zgierski

  • Mechanism of Radiationless Triplet Decay in Aromatic Hydrocarbons and the Magnitude of the Franck—Condon Factors

    Unknown

  • Mode‐specific hydrogen tunneling in tropolone: An instanton approach

    Zorka Smedarchina;Willem Siebrand;Marek Z. Zgierski

  • Dispersive kinetics: a structural approach to nonexponential processes in disordered media

    Willem Siebrand;Timothy A. Wildman

  • An instanton approach to intramolecular hydrogen exchange: Tunneling splittings in malonaldehyde and the hydrogenoxalate anion

    Zorka Smedarchina;Willem Siebrand;Marek Z. Zgierski

  • Charge-transfer excitons in anthracene crystals and their role in optical charge carrier generation

    Pamela J. Bounds;Willem Siebrand

  • Nuclear Spin—Spin Coupling Involving Heavy Nuclei. The Coupling between Hg199 and H1 Nuclei in CH3HgX and CH3CH2HgX Compounds

    Unknown

  • Proton tunnelling in polyatomic molecules: A direct-dynamics instanton approach

    Willem Siebrand;Zorka Smedarchina;Marek Z. Zgierski;Antonio Fernandez-RAMOS

  • GOLDEN‐RULE TREATMENT OF HYDROGEN‐TRANSFER REACTIONS. 1. PRINCIPLES

    Willem Siebrand;Timothy A. Wildman;Marek Z. Zgierski

  • Charge-transfer excitons in anthracene crystals. A theoretical investigation of their optical absorption and thermal dissociation☆

    Pamela J. Bounds;Piotr Petelenz;Willem Siebrand

  • Exactly solvable models for vibronic coupling in molecular spectroscopy. I. Nontotally symmetric harmonic mode

    A. R. Gregory;W. H. Henneker;W. Siebrand;M. Z. Zgierski

  • Transport of Quasilocalized Excitons in Molecular Crystals

    R. W. Munn;W. Siebrand

  • Golden-rule treatment of hydrogen-transfer reactions. 2. Applications

    Willem Siebrand;Timothy A. Wildman;Marek Z. Zgierski

  • A direct-dynamics study of proton transfer through water bridges in guanine and 7-azaindole

    Zorka Smedarchina;Willem Siebrand;Antonio Fernández-Ramos;Leonid Gorb

  • A direct-dynamics study of the zwitterion-to-neutral interconversion of glycine in aqueous solution

    Antonio Fernández-Ramos;Zorka Smedarchina;Willem Siebrand;Marek Z. Zgierski

  • Theory of Charge Carrier Transport in Aromatic Hydrocarbon Crystals

    R. W. Munn;W. Siebrand

  • Calculation and spectroscopic assignment of charge-transfer states in solid anthracene, tetracene and pentacene

    P.J. Bounds;W. Siebrand;I. Eisenstein;R.W. Munn

  • Effect of line broadening mechanisms on resonance Raman excitation profiles: A possible method for measuring short lifetimes

    A.P. Penner;W. Siebrand

Frequent Co-Authors

Marek Z. Zgierski
Marek Z. Zgierski National Research Council Canada
Francesco Zerbetto
Francesco Zerbetto University of Bologna
Keith U. Ingold
Keith U. Ingold National Research Council Canada
Giorgio Orlandi
Giorgio Orlandi University of Bologna
Fabrizia Negri
Fabrizia Negri University of Bologna
Juan C. Scaiano
Juan C. Scaiano University of Ottawa
Marek Samoc
Marek Samoc Wrocław University of Science and Technology
Jerzy Leszczynski
Jerzy Leszczynski Jackson State University
David W. Pratt
David W. Pratt University of Vermont
Leonid Gorb
Leonid Gorb Jackson State University

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