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Koen Clays

Koen Clays

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Chemistry
Belgium
2025

D-Index & Metrics

Discipline name D-Index World Ranking Current World Ranking National Ranking Current National Ranking Publications Citations
Chemistry 79 3673 3331 50 49 407 19762

Koen Clays publications per year

The chart shows the history of publications by Koen Clays between 1988 and 2026, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. Koen Clays published across 39 years, from 1988 to 2026, averaging 12.3 papers a year. Output peaked at 39 publications in 2009. 8 of the 481 publications appeared in the last two years.

No. of publications
10 20 30
Bar chart. Horizontal axis: year, 1988 to 2026. Vertical axis: number of publications, 0 to 39. Peak 39 publications in 2009. 1988: 2 publications 1989: 4 publications 1990: 0 publications 1991: 2 publications 1992: 2 publications 1993: 12 publications 1994: 7 publications 1995: 11 publications 1996: 14 publications 1997: 3 publications 1998: 17 publications 1999: 6 publications 2000: 9 publications 2001: 13 publications 2002: 12 publications 2003: 23 publications 2004: 12 publications 2005: 12 publications 2006: 22 publications 2007: 16 publications 2008: 20 publications 2009: 39 publications 2010: 30 publications 2011: 23 publications 2012: 16 publications 2013: 14 publications 2014: 10 publications 2015: 17 publications 2016: 21 publications 2017: 14 publications 2018: 13 publications 2019: 6 publications 2020: 8 publications 2021: 10 publications 2022: 9 publications 2023: 12 publications 2024: 12 publications 2025: 7 publications 2026: 1 publication
1988 2026

481 publications in total across all disciplines

View publications per year as a table
Koen Clays: publications per year, 1988 to 2026
Year Publications
1988 2
1989 4
1990 0
1991 2
1992 2
1993 12
1994 7
1995 11
1996 14
1997 3
1998 17
1999 6
2000 9
2001 13
2002 12
2003 23
2004 12
2005 12
2006 22
2007 16
2008 20
2009 39
2010 30
2011 23
2012 16
2013 14
2014 10
2015 17
2016 21
2017 14
2018 13
2019 6
2020 8
2021 10
2022 9
2023 12
2024 12
2025 7
2026 1
Total 481
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Koen Clays 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 Koen Clays 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, 401–420 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: 407 publications — 81st percentile

81% 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
301–320 764
321–340 643
341–360 628
361–380 522
381–400 459
401–420 397 407
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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Koen Clays 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 Koen Clays 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, 78–79 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: 79 D-Index — 80th percentile

80% 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 79
80–81 354
82–83 292
84–85 275
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

  • 2025 - Research.com Chemistry in Belgium Leader Award
  • 2022 - Research.com Chemistry in Belgium Leader Award
  • 2009 - SPIE Fellow

Overview

Koen Clays is affiliated with KU Leuven in Belgium and works primarily in the fields of Materials Science and Engineering. Their research focuses notably on Materials Chemistry, Electronic, Optical and Magnetic Materials, Biomedical Engineering, Electrical and Electronic Engineering, and Organic Chemistry.

The scientist's work covers a range of main topics including:

  • Nonlinear Optical Materials Research
  • Nonlinear Optical Materials Studies
  • Porphyrin and Phthalocyanine Chemistry
  • Liquid Crystal Research Advancements
  • Photochromic and Fluorescence Chemistry
  • Crystallization and Solubility Studies
  • X-ray Diffraction in Crystallography

Koen Clays has published extensively in several scientific venues. The most frequent include:

  • The Cambridge Structural Database
  • Macromolecules
  • Chemistry of Materials
  • Advanced Functional Materials
  • Angewandte Chemie International Edition

Some recent papers highlight areas of advanced materials and electro-optic phenomena:

  • Ultrahigh Electro-Optic Coefficients, High Index of Refraction, and Long-Term Stability from Diels-Alder Cross-Linkable Binary Molecular Glasses, 2020, Chemistry of Materials
  • Electro-Optic Activity in Excess of 1000 pm V−1 Achieved via Theory-Guided Organic Chromophore Design, 2021, Advanced Materials
  • Design and synthesis of chromophores with enhanced electro-optic activities in both bulk and plasmonic-organic hybrid devices, 2021, Materials Horizons
  • Bis(4-dialkylaminophenyl)heteroarylamino donor chromophores exhibiting exceptional hyperpolarizabilities, 2021, Journal of Materials Chemistry C
  • Scattering Model for Composite Stereolithography to Enable Resin-Filler Selection and Cure Depth Control, 2021, ACS Applied Polymer Materials

Koen Clays collaborates frequently with several coauthors, including:

  • Yovan de Coene
  • Stijn Van Cleuvenbergen
  • Thierry Verbiest
  • Carmen Bartic
  • Olivier Deschaume

In 2009, Koen Clays was recognized as an SPIE Fellow, an award reflecting contributions in their scientific domain.

Best Publications

  • Hyper‐Rayleigh scattering in solution

    Koen Clays;André Persoons

  • Second-order nonlinear optical materials: recent advances in chromophore design

    Thierry Verbiest;Stephan Houbrechts;Martti Kauranen;Koen Clays

  • Fabrication of 3D Photonic Crystals of Ellipsoids: Convective Self-Assembly in Magnetic Field

    Tao Ding;Kai Song;Koen Clays;Chen-Ho Tung

  • Hyper-Rayleigh Scattering in Isotropic Solution

    Eric Hendrickx;Koen Clays;Andre Persoons

  • Design, Synthesis, Linear, and Nonlinear Optical Properties of Conjugated (Porphinato)zinc(II)-Based Donor−Acceptor Chromophores Featuring Nitrothiophenyl and Nitrooligothiophenyl Electron-Accepting Moieties

    Tian-Gao Zhang;Yuxia Zhao;Inge Asselberghs;André Persoons

  • INVESTIGATIONS OF THE HYPERPOLARIZABILITY IN ORGANIC MOLECULES FROM DIPOLAR TO OCTOPOLAR SYSTEMS

    Thierry Verbiest;Koen Clays;Celest Samyn;J Wolff

  • Quadratic Nonlinear Optical Properties of N-Aryl Stilbazolium Dyes**

    Benjamin J. Coe;James A. Harris;Inge Asselberghs;Koen Clays

  • Second-order Nonlinear Optical Characterization Techniques: An Introduction

    Thierry Verbiest;Koen Clays;Vincent Rodriguez

  • High-frequency demodulation of multi-photon fluorescence in hyper-Rayleigh scattering

    Geert Olbrechts;Rik Strobbe;Koen Clays;André Persoons

  • Ordering and optical properties of monolayers and multilayers of silica spheres deposited by the Langmuir–Blodgett method

    Márta Szekeres;Márta Szekeres;Olexiy Kamalin;Robert A. Schoonheydt;Kurt Wostyn

  • Supramolecular Second-Order Nonlinearity of Polymers with Orientationally Correlated Chromophores

    Martti Kauranen;Thierry Verbiest;Carlo Boutton;M.N. Teerenstra

  • Linear and Nonlinear Optical Properties of Colloidal Photonic Crystals

    Luis González-Urbina;Kasper Baert;Branko Kolaric;Javier Pérez-Moreno

  • Quadratic Optical Nonlinearities of N‐Methyl and N‐Aryl Pyridinium Salts

    Benjamin J. Coe;James A. Harris;Inge Asselberghs;Kurt Wostyn

  • Instantaneous, Simple, and Reversible Revealing of Invisible Patterns Encrypted in Robust Hollow Sphere Colloidal Photonic Crystals.

    Kuo Zhong;Jiaqi Li;Liwang Liu;Stijn Van Cleuvenbergen

  • Switching of molecular second-order polarisability in solution

    Inge Asselberghs;Koen Clays;André Persoons;Michael D. Ward

  • Nonlinear Optical Properties of Proteins Measured by Hyper-Rayleigh Scattering in Solution

    Koen Clays;Eric Hendrickx;M Triest;Thierry Verbiest

  • X-Shaped electro-optic chromophore with remarkably blue-shifted optical absorption. Synthesis, characterization, linear/nonlinear optical properties, self-assembly, and thin film microstructural characteristics.

    Hu Kang;Guennadi Evmenenko;Pulak Dutta;Koen Clays

  • Unusual frequency dispersion effects of the nonlinear optical response in highly conjugated (polypyridyl)metal-(porphinato)zinc(II) chromophores.

    H. Tetsuo Uyeda;Yuxia Zhao;Kurt Wostyn;Inge Asselberghs

  • Design strategies versus limiting theory for engineering large second-order nonlinear optical polarizabilities in charged organic molecules

    Koen Clays;Benjamin J. Coe

  • Syntheses and properties of two-dimensional charged nonlinear optical chromophores incorporating redox-switchable cis-tetraammineruthenium(II) centers

    Benjamin J. Coe;James A. Harris;Lathe A. Jones;Bruce S. Brunschwig

Frequent Co-Authors

Bruce S. Brunschwig
Bruce S. Brunschwig California Institute of Technology
Michael J. Therien
Michael J. Therien Duke University
Mark G. Humphrey
Mark G. Humphrey Australian National University
Benoît Champagne
Benoît Champagne University of Namur
Marek Samoc
Marek Samoc Wrocław University of Science and Technology
Mark G. Kuzyk
Mark G. Kuzyk Washington State University

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