World's Best Scientists 2026 revealed!
António J. C. Varandas

António J. C. Varandas

D-Index & Metrics

Chemistry

D-Index
64
Citations
14112
World Ranking
8068
National Ranking
66

António J. C. Varandas 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 António J. C. Varandas 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: 430 publications — 83rd percentile

83% of scientists in this discipline score the same or lower.

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

António J. C. Varandas 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 António J. C. Varandas 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: 64 D-Index — 56th percentile

56% 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

  • Lisbon Academy of Sciences (Academia das Ciências de Lisboa)
  • Lisbon Academy of Sciences (Academia das Ciências de Lisboa)
  • Lisbon Academy of Sciences (Academia das Ciências de Lisboa)
  • Lisbon Academy of Sciences (Academia das Ciências de Lisboa)
  • Lisbon Academy of Sciences (Academia das Ciências de Lisboa)
  • Lisbon Academy of Sciences (Academia das Ciências de Lisboa)
  • Lisbon Academy of Sciences (Academia das Ciências de Lisboa)

Overview

António J. C. Varandas is affiliated with the University of Coimbra in Portugal. Their research primarily spans the fields of Physics and Astronomy as well as Chemistry, with particular focus on several subfields including Atomic and Molecular Physics, and Optics; Spectroscopy; Materials Chemistry; Organic Chemistry; and Inorganic Chemistry.

Their work covers a range of main topics including Advanced Chemical Physics Studies, Spectroscopy and Quantum Chemical Studies, Quantum, superfluid, helium dynamics, Molecular Spectroscopy and Structure, Spectroscopy and Laser Applications, Inorganic Fluorides and Related Compounds, and Crystallography and molecular interactions.

Varandas has published extensively, with a concentration in notable venues such as Physical Chemistry Chemical Physics, Chemical Physics Letters, The Journal of Chemical Physics, The Journal of Physical Chemistry A, and Molecular Physics.

Recent publications by António J. C. Varandas include:

  • A general code for fitting global potential energy surfaces via CHIPR method: Direct-Fit Diatomic and tetratomic molecules (2020, Computer Physics Communications)
  • Canonical and explicitly-correlated coupled cluster correlation energies of sub-kJ mol−1 accuracy via cost-effective hybrid-post-CBS extrapolation (2021, Physical Chemistry Chemical Physics)
  • Extrapolation in quantum chemistry: Insights on energetics and reaction dynamics (2020, Journal of Theoretical and Computational Chemistry)
  • Canonical versus explicitly correlated coupled cluster: Post-complete-basis-set extrapolation and the quest of the complete-basis-set limit (2020, International Journal of Quantum Chemistry)
  • Post-complete-basis-set extrapolation of conventional and explicitly correlated coupled-cluster energies: can the convergence to the CBS limit be diagnosed? (2021, Physical Chemistry Chemical Physics)

Their frequent coauthors include Breno R. L. Galvão, V. C. Mota, F. N. N. Pansini, T. Mondal, and Jianjun Fang.

António J. C. Varandas has received recognition such as membership in the Lisbon Academy of Sciences (Academia das Ciências de Lisboa).

Best Publications

  • A double many‐body expansion of the two lowest‐energy potential surfaces and nonadiabatic coupling for H3

    Antonio J. C. Varandas;Antonio J. C. Varandas;Franklin B. Brown;Franklin B. Brown;C. Alden Mead;Donald G. Truhlar

  • Recalibration of a single-valued double many-body expansion potential energy surface for ground-state hydroperoxy and dynamics calculations for the oxygen atom + hydroxyl .fwdarw. oxygen + hydrogen atom reaction

    M. R. Pastrana;L. A. M. Quintales;J. Brandao;A. J. C. Varandas

  • Predicting Catalysis: Understanding Ammonia Synthesis from First-Principles Calculations

    A Hellman;E.J. Baerends;M Biczysko;T Bligaard

  • A realistic double many-body expansion (DMBE) potential energy surface for ground-state O3 from a multiproperty fit to ab initio calculations, and to experimental spectroscopic, inelastic scattering, and kinetic isotope thermal rate data

    A.J.C. Varandas;A.A.C.C. Pais

  • Extrapolating to the one-electron basis-set limit in electronic structure calculations

    A. J. C. Varandas

  • Basis-set extrapolation of the correlation energy

    A. J. C. Varandas

  • Intermolecular and Intramolecular Potentials: Topographical Aspects, Calculation, and Functional Representation via A Double Many‐Body Expansion Method

    Unknown

  • Potential model for diatomic molecules including the united-atom limit and its use in a multiproperty fit for argon

    António J. C. Varandas;José Dias da Silva

  • Analytical potentials for triatomic molecules

    J.N. Murrell;S. Carter;I.M. Mills;M.F. Guest

  • Excitation function for H+O2 reaction: A study of zero‐point energy effects and rotational distributions in trajectory calculations

    A. J. C. Varandas

  • Quasiclassical trajectory calculations of the thermal rate coefficients for the reactions H(D)+O2→OH(D)+O and O+OH(D)→O2+H(D) as a function of temperature

    A. J. C. Varandas;J. Brandão;M. R. Pastrana

  • Energy switching approach to potential surfaces: An accurate single‐valued function for the water molecule

    A. J. C. Varandas

  • VENUS96: A General Chemical Dynamics Computer Program

    W L Hase;Ronald J. Duchovic;X Hu;A Komornicki

  • A novel non-active model to account for the leak of zero-point energy in trajectory calculations. Application to H + O2 reaction near threshold

    A.J.C. Varandas

  • A many-body expansion of polyatomic potential energy surfaces: application to Hn systems

    António J. C. Varandas;John N. Murrell

  • Analytical potentials for triatomic molecules IX. The prediction of anharmonic force constants from potential energy surfaces based on harmonic force fields and dissociation energies for SO2 and O3

    S. Carter;I.M. Mills;J.N. Murrell;A.J.C. Varandas

  • A general approach to the potential energy functions of small polyatomic systems: Molecules and van der Waals molecules

    A.J.C. Varandas

  • A useful triangular plot of triatomic potential energy surfaces

    A.J.C. Varandas

  • Four-atom bimolecular reactions with relevance in environmental chemistry: Theoretical work

    A. J. C. Varandas

  • Narrowing the error in electron correlation calculations by basis set re-hierarchization and use of the unified singlet and triplet electron-pair extrapolation scheme: application to a test set of 106 systems.

    A. J. C. Varandas;A. J. C. Varandas;F. N. N. Pansini

  • Use of scaled external correlation, a double many-body expansion, and variational transition state theory to calibrate a potential energy surface for FH2

    Gillian C. Lynch;Rozeanne Steckler;Rozeanne Steckler;David W. Schwenke;David W. Schwenke;Antonio J. C. Varandas;Antonio J. C. Varandas

  • QUANTUM MECHANICAL VALENCE STUDY OF A BOND-BREAKING-BOND-FORMING PROCESS IN TRIATOMIC SYSTEMS

    Roman F. Nalewajski;Sebastiãto J. Formosinho;AntÓnio J.C. Varandas;Janusz Mrozek

Frequent Co-Authors

John N. Murrell
John N. Murrell University of Sussex
Ke-Li Han
Ke-Li Han Dalian Institute of Chemical Physics
Piotr Piecuch
Piotr Piecuch Michigan State University
Donald G. Truhlar
Donald G. Truhlar University of Minnesota
Kenneth Stuart Sorbie
Kenneth Stuart Sorbie Heriot-Watt University
Jonathan Tennyson
Jonathan Tennyson University College London
Bruce C. Garrett
Bruce C. Garrett United States Department of Energy
John Z. H. Zhang
John Z. H. Zhang New York University
Sean C. Smith
Sean C. Smith Australian National University
William L. Hase
William L. Hase Texas Tech University

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