World's Best Scientists 2026 revealed!
Alfred Karpfen

Alfred Karpfen

D-Index & Metrics

Chemistry

D-Index
54
Citations
6466
World Ranking
12881
National Ranking
84

Alfred Karpfen 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 Alfred Karpfen 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: 157 publications — 16th percentile

16% of scientists in this discipline score the same or lower.

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

Alfred Karpfen 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 Alfred Karpfen 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: 54 D-Index — 31st percentile

31% of scientists in this discipline score the same or lower.

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

Overview

Alfred Karpfen is affiliated with the University of Vienna in Austria. The scientific record available does not list recent papers, co-authors, publication venues, book publications, fields or subfields of study, main topics of work, or awards associated with Alfred Karpfen.

Best Publications

  • Single-Bond Torsional Potentials in Conjugated Systems: A Comparison of ab Initio and Density Functional Results

    Alfred Karpfen;Cheol Ho Choi;Miklos Kertesz

  • Molecular Geometries and Vibrational Spectra of Phenol, Benzaldehyde, and Salicylaldehyde: Experimental versus Quantum Chemical Data

    Heike Lampert;Werner Mikenda;Alfred Karpfen

  • The effects of electron correlation on the degree of bond alternation and electronic structure of oligomers of polyacetylene

    Cheol Ho Choi;Miklos Kertesz;Alfred Karpfen

  • Cooperative Effects in Hydrogen Bonding

    Alfred Karpfen

  • Coupled pair functional study on the hydrogen fluoride dimer. I. Energy surface and characterization of stationary points

    Manfred Kofranek;Hans Lischka;Alfred Karpfen

  • Ab initio studies on polymers. V. All‐trans‐polyethylene

    Alfred Karpfen

  • Ab initio studies on polymers. I. The linear infinite polyyne

    A Karpfen

  • Intramolecular Hydrogen Bonding in 2-Hydroxybenzoyl Compounds: Infrared Spectra and Quantum Chemical Calculations

    Heike Lampert;Werner Mikenda, ,† and;Alfred Karpfen

  • Ab initio studies on heterocyclic conjugated polymers: structure and vibrational spectra of thiophene, oligothiophenes and polythiophene

    Manfred Kofranek;Tomáš Kovář;Hans Lischka;Alfred Karpfen

  • Ab initio Studies on polymers

    Alfred Karpfen;Jordan Petkov

  • Ab initio studies on polymers. IV. Polydiacetylenes

    A Karpfen

  • Charge-Transfer Complexes between NH3 and the Halogens F2, ClF, and Cl2: An ab Initio Study on the Intermolecular Interaction

    Alfred Karpfen

  • Ab initio studies on hydrogen-bonded clusters. I. Linear and cyclic oligomers of hydrogen cyanide

    Manfred Kofranek;Alfred Karpfen;Hans Lischka

  • Spatial Extension of a Bipolaronic Defect in Oligothiophenes and in Polythiophene: A Combined Semiempirical and ab Initio Study

    C. Ehrendorfer;A. Karpfen

  • An analytical six‐dimensional potential energy surface for (HF)2 from ab initio calculations

    P. R. Bunker;Manfred Kofranek;Hans Lischka;Alfred Karpfen

  • Cis-trans isomerism in infinite polyacetylenes: an Ab initio study☆

    A. Karpfen;R. Höller

  • An ab initio calculation of the intramolecular stretching spectra for the HF dimer and its D‐substituted isotopic species

    Per Jensen;P. R. Bunker;Alfred Karpfen;Manfred Kofranek

  • An approach to estimate the energy of the intramolecular hydrogen bond

    P Lipkowski;A Koll;A Karpfen;P Wolschann

  • The intermolecular interaction in the charge-transfer complexes between amines and halogens: A theoretical characterization of the trends in halogen bonding

    Alfred Karpfen

  • Ab initio calculations on the excited states of π-systems. II. Valence excitations in diacetylene

    Alfred Karpfen;Hans Lischka

Frequent Co-Authors

Hans Lischka
Hans Lischka Texas Tech University
Péter G. Szalay
Péter G. Szalay Eötvös Loránd University
Miklos Kertesz
Miklos Kertesz Georgetown University
Jeunghee Park
Jeunghee Park Korea University
Ajit J. Thakkar
Ajit J. Thakkar University of New Brunswick
Attila G. Császár
Attila G. Császár Eötvös Loránd University
Michael H. Abraham
Michael H. Abraham University College London
Peter Bäuerle
Peter Bäuerle University of Ulm
Beate I. Escher
Beate I. Escher Helmholtz Centre for Environmental Research
Tucker Carrington
Tucker Carrington Queen's University

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