World's Best Scientists 2026 revealed!
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Andrew J. Orr-Ewing

D-Index & Metrics

Chemistry

D-Index
62
Citations
12189
World Ranking
8933
National Ranking
497

Andrew J. Orr-Ewing 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 Andrew J. Orr-Ewing 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: 338 publications — 71st percentile

71% of scientists in this discipline score the same or lower.

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

Andrew J. Orr-Ewing 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 Andrew J. Orr-Ewing 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: 62 D-Index — 52nd percentile

52% 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

  • 2018 - Member of Academia Europaea
  • 2017 - Fellow of the Royal Society, United Kingdom
  • 2009 - Tilden Prize, Royal Society of Chemistry (UK)
  • 1999 - Marlow Award, Royal Society of Chemistry (UK)
  • 1994 - Edward Harrison Memorial Prize, Royal Society of Chemistry (UK)

Overview

Andrew J. Orr-Ewing is affiliated with the University of Bristol in the United Kingdom. Their research primarily spans the field of chemistry, with a focus on several specialized subfields and related topics.

The main fields of study include:

  • Chemistry

Within this broad area, Orr-Ewing's work covers significant subfields such as:

  • Organic Chemistry
  • Atmospheric Science
  • Physical and Theoretical Chemistry
  • Materials Chemistry
  • Atomic and Molecular Physics, and Optics

The specific research topics addressed include:

  • Atmospheric chemistry and aerosols
  • Radical Photochemical Reactions
  • Photochemistry and Electron Transfer Studies
  • Atmospheric Ozone and Climate
  • Atmospheric aerosols and clouds
  • Photochromic and Fluorescence Chemistry
  • Catalytic C-H Functionalization Methods

Orr-Ewing has published extensively, including multiple papers that address issues ranging from atmospheric chemistry to photochemical reactions. Selected recent publications are as follows:

  • "Criegee intermediates: production, detection and reactivity", 2020, International Reviews in Physical Chemistry
  • "Singlet and Triplet Contributions to the Excited-State Activities of Dihydrophenazine, Phenoxazine, and Phenothiazine Organocatalysts Used in Atom Transfer Radical Polymerization", 2021, Journal of the American Chemical Society
  • "Trifluoroacetic Acid: Toxicity, Sources, Sinks and Future Prospects", 2024, Sustainability
  • "Solvent Effects on Ultrafast Photochemical Pathways", 2021, Accounts of Chemical Research
  • "Investigation of the Production of Trifluoroacetic Acid from Two Halocarbons, HFC-134a and HFO-1234yf and Its Fates Using a Global Three-Dimensional Chemical Transport Model", 2021, ACS Earth and Space Chemistry

A number of frequent co-authors have collaborated with Orr-Ewing, including:

  • Mahima Sneha
  • Michael N. R. Ashfold
  • Deborin Ghosh
  • David Heathcote
  • Claire Vallance

Orr-Ewing's research has appeared in prominent publication venues, emphasizing physical chemistry and chemical research, such as:

  • The Journal of Physical Chemistry A
  • Journal of the American Chemical Society
  • Bristol Research (University of Bristol)
  • ACS Earth and Space Chemistry
  • Chemical Science

Throughout their career, Orr-Ewing has received multiple awards recognizing contributions to chemistry. These include:

  • Member of Academia Europaea (2018)
  • Fellow of the Royal Society, United Kingdom (2017)
  • Tilden Prize, Royal Society of Chemistry (UK) (2009)
  • Marlow Award, Royal Society of Chemistry (UK) (1999)
  • Edward Harrison Memorial Prize, Royal Society of Chemistry (UK) (1994)

Best Publications

  • Cavity ring-down spectroscopy

    Martyn D. Wheeler;Stuart M. Newman;Andrew J. Orr-Ewing;Michael N. R. Ashfold

  • Orientation and Alignment of Reaction Products

    Andrew J. Orr-Ewing;Richard N. Zare

  • Imaging the dynamics of gas phase reactions

    Michael N. R. Ashfold;N. Hendrik Nahler;Andrew J. Orr-Ewing;Olivier P. J. Vieuxmaire

  • 4 Cavity ring-down and cavity enhanced spectroscopy using diode lasers

    Mikhail Mazurenka;Andrew J. Orr-Ewing;Robert Peverall;Grant A. D. Ritchie

  • REACTION OF CL WITH VIBRATIONALLY EXCITED CH4 AND CHD3 : STATE-TO-STATE DIFFERENTIAL CROSS SECTIONS AND STERIC EFFECTS FOR THE HCL PRODUCT

    William R. Simpson;T. Peter Rakitzis;S. Alex Kandel;Andrew J. Orr‐Ewing

  • Beyond state-to-state differential cross sections: determination of product polarization in photoinitiated bimolecular reactions

    Neil E. Shafer-Ray;Andrew J. Orr-Ewing;Richard N. Zare

  • State-to-state differential cross sections for the reaction Cl (2P32) + CH4 (ν3 = 1, J = 1) → HCl (v′ = 1, J′) + CH3

    William R. Simpson;Andrew J. Orr-Ewing;Richard N. Zare

  • Integrated absorption intensity and Einstein coefficients for the O2 a1Δg-X3Σg- (0,0) transition: a comparison of cavity ringdown and high resolution Fourier transform spectroscopy with a long-path absorption cell

    Stuart M. Newman;Ian C. Lane;Andrew J. Orr-Ewing;David A. Newnham

  • Core extraction for measuring state‐to‐state differential cross sections of bimolecular reactions

    William R. Simpson;Andrew J. Orr‐Ewing;T. Peter Rakitzis;S. Alex Kandel

  • Criegee Intermediate Reactions with Carboxylic Acids: A Potential Source of Secondary Organic Aerosol in the Atmosphere

    Rabi Chhantyal-Pun;Brandon Rotavera;Max R. McGillen;M. Anwar H. Khan

  • State-to-state differential cross sections from photoinitiated bulb reactions

    Neil E. Shafer;Andrew J. Orr-Ewing;William R. Simpson;Hao Xu

  • Ultrafast Observation of a Photoredox Reaction Mechanism: Photoinitiation in Organocatalyzed Atom-Transfer Radical Polymerization.

    Daisuke Koyama;Harvey J. A. Dale;Andrew J. Orr-Ewing

  • A kinetic study of the CH2OO Criegee intermediate self-reaction, reaction with SO2 and unimolecular reaction using cavity ring-down spectroscopy

    Rabi Chhantyal-Pun;Anthony Davey;Dudley E Shallcross;Carl J Percival

  • Iodine-mediated coastal particle formation: an overview of the Reactive Halogens in the Marine Boundary Layer (RHaMBLe) Roscoff coastal study

    Gordon Mcfiggans;C. S. E. Bale;S. M. Ball;J. M. Beames

  • Continuum state spectroscopy: A high resolution ion imaging study of IBr photolysis in the wavelength range 440–685 nm

    Eckart Wrede;Stefan Laubach;Sonja Schulenburg;Alex Brown

  • Probing the Ultrafast Energy Dissipation Mechanism of the Sunscreen Oxybenzone after UVA Irradiation

    Lewis A. Baker;Michael D. Horbury;Simon E. Greenough;Philip M. Coulter

  • The Ultraviolet Photodissociation Dynamics of Hydrogen Bromide

    Paul M. Regan;Stephen R. Langford;Andrew J. Orr-Ewing;Michael N. R. Ashfold

  • Scattering-angle resolved product rotational alignment for the reaction of Cl with vibrationally excited methane

    Andrew J Orr-Ewing;WR Simpson;TP Rakitzis;SA Kandel

  • Criegee Intermediate–Alcohol Reactions, A Potential Source of Functionalized Hydroperoxides in the Atmosphere

    Max R. McGillen;Basile F.E. Curchod;Rabi Chhantyal-Pun;Joseph M Beames

  • The study of reactive intermediates in condensed phases

    Barry K. Carpenter;Jeremy N. Harvey;Andrew J. Orr-Ewing

  • The dynamics of chlorine-atom reactions with polyatomic organic molecules

    Craig Murray;Andrew J. Orr-Ewing

Frequent Co-Authors

Michael N. R. Ashfold
Michael N. R. Ashfold University of Bristol
Dudley E. Shallcross
Dudley E. Shallcross University of Bristol
Jonathan P. Reid
Jonathan P. Reid University of Bristol
Carl J. Percival
Carl J. Percival University of Manchester
Jeremy N. Harvey
Jeremy N. Harvey KU Leuven
Richard N. Zare
Richard N. Zare Stanford University
Michael Towrie
Michael Towrie Rutherford Appleton Laboratory
Craig A. Taatjes
Craig A. Taatjes Sandia National Laboratories
Wybren Jan Buma
Wybren Jan Buma University of Amsterdam
Paul J. Dagdigian
Paul J. Dagdigian Johns Hopkins University

External Links

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Best Scientists Citing Andrew J. Orr-Ewing

Michael N. R. Ashfold

Michael N. R. Ashfold

University of Bristol

Publications: 73

Richard N. Zare

Richard N. Zare

Stanford University

Publications: 71

Mark Brouard

Mark Brouard

University of Oxford

Publications: 61

Kopin Liu

Kopin Liu

Academia Sinica

Publications: 54

Arthur G. Suits

Arthur G. Suits

University of Missouri

Publications: 50

Jim J. Lin

Jim J. Lin

National Taiwan University

Publications: 38

Xueming Yang

Xueming Yang

Dalian Institute of Chemical Physics

Publications: 35

F. J. Aoiz

F. J. Aoiz

Complutense University of Madrid

Publications: 28

Yuan-Pern Lee

Yuan-Pern Lee

Academia Sinica

Publications: 27

Luis Bañares

Luis Bañares

Complutense University of Madrid

Publications: 24

Dudley E. Shallcross

Dudley E. Shallcross

University of Bristol

Publications: 22

Jonathan P. Reid

Jonathan P. Reid

University of Bristol

Publications: 21

Gábor Czakó

Gábor Czakó

University of Szeged

Publications: 19

Paul J. Dagdigian

Paul J. Dagdigian

Johns Hopkins University

Publications: 19

Joel M. Bowman

Joel M. Bowman

Emory University

Publications: 19

Hua Guo

Hua Guo

University of New Mexico

Publications: 18

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