Patrick J. O’Malley

2.7k citations

124 papers · 2.3k · h-index 28

Impact in

Physical and Theoretical Chemistry top 1%
- Photochemistry and Electron Transfer Studies
Biophysics top 1%
- Electron Spin Resonance Studies

Papers in

Molecular Biology 55
- Photosynthetic Processes and Mechanisms 46
Atomic and Molecular Physics, and Optics 55
- Spectroscopy and Quantum Chemical Studies 42
- Advanced Chemical Physics Studies 22

Co-authors: Simon J. Collins (8 shared papers)Stephen E. J. Rigby (3 shared papers)Jonathan H. A. Nugent (3 shared papers)Wagner B. De Almeida (15 shared papers)Sergei A. Dikanov (15 shared papers)Paul L. A. Popelier (5 shared papers)Colin A. Wraight (10 shared papers)Alexander T. Taguchi (12 shared papers)
Journals: Chemical Physics Letters (17 papers)The Journal of Physical Chemistry B (16 papers)Biochemistry (10 papers)Journal of the American Chemical Society (9 papers)The Journal of Physical Chemistry Letters (7 papers)
Partner nations: United Kingdom United States Russia

In The Last Decade

Patrick J. O’Malley

123 papers receiving 2.2k citations

Peers

Replace Cecilia Tommos with:

Cecilia Tommos United States

Friedhelm Lendzian Germany

Miquel Moreno Spain

Torbjörn Pascher Sweden

Sebastian Sinnecker Germany

Daniel Roca‐Sanjuán Spain

Marilena Di Valentin Italy

Chensheng Ma Hong Kong

Oliver Weingart Germany

Seigo Yamauchi Japan

Patrick J. O’Malley relative to Cecilia Tommos United States Cecilia Tommos's profile →

Citations per field

00.5×1.6×

Cecilia Tommos · 1×

×1.0 512/499

PTC

×1.1 315/279

BIOPH

×0.4 533/1k

IC

×1.6 779/502

AMPO

×1.0 555/552

OC

Citations per year

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Countries citing papers authored by Patrick J. O’Malley

Since Specialization

Citations

This map shows the geographic impact of Patrick J. O’Malley's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by Patrick J. O’Malley with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Patrick J. O’Malley more than expected).

Fields of papers citing papers by Patrick J. O’Malley

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Patrick J. O’Malley. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by Patrick J. O’Malley. The network helps show where Patrick J. O’Malley may publish in the future.

Co-authors

The 25 scholars most cited alongside Patrick J. O’Malley, linked wherever they have co-authored with each other. Click a name or a connecting line to browse the papers they share.

Border = papers with Patrick J. O’Malley Line = papers co-authored together Patrick J. O’Malley links everyone, so they are left out of the graph.

All Works

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20 of 20 papers shown

Showing the 20 most-cited of 124 papers — load more, or switch the sort, to bring in the rest.

#	Work
1	ENDOR and Special Triple Resonance Studies of Chlorophyll Cation Radicals in Photosystem 2 Biochemistry ·Stephen E. J. Rigby, Jonathan H. A. Nugent, Patrick J. O’Malley	1994	102
2	Hybrid Density Functional Study of the p-Benzosemiquinone Anion Radical: The Influence of Hydrogen Bonding on Geometry and Hyperfine Couplings The Journal of Physical Chemistry A ·Patrick J. O’Malley	1997	68
3	The dark stable tyrosine radical of photosystem 2 studied in three species using ENDOR and EPR spectroscopies Biochemistry ·Stephen E. J. Rigby, Jonathan H. A. Nugent, Patrick J. O’Malley	1994	61
4	Hybrid Density Functional Studies of the Oxidation of Phenol−Imidazole Hydrogen-Bonded Complexes: A Model for Tyrosine Oxidation in Oxygenic Photosynthesis Journal of the American Chemical Society ·Patrick J. O’Malley	1998	60
5	3-Phenyl-4-hydroxyquinolin-2(1H)-ones: potent and selective antagonists at the strychnine-insensitive glycine site on the N-methyl-D-aspartate receptor complex Journal of Medicinal Chemistry ·Loretta A. McQuaid, Edward C. Smith, David Lodge, Étienne Pralong, James H. Wikel, David O. Calligaro, Patrick J. O’Malley	1992	59
6	B3LYP, Hybrid Density Functional Studies of the Durosemiquinone Radical: The Effect of Symmetrical and Asymmetrical Hydrogen Bonding on Spin Densities and Hyperfine Couplings The Journal of Physical Chemistry A ·Patrick J. O’Malley	1998	57
7	A Theoretical Description for the Monomolecular Cracking of C-C Bonds over Acidic Zeolites Journal of Catalysis ·Simon J. Collins, Patrick J. O’Malley	1995	54
8	Synthesis and excitatory amino acid pharmacology of a series of heterocyclic-fused quinoxalinones and quinazolinones Journal of Medicinal Chemistry ·Loretta A. McQuaid, Edward C. Smith, Kelly South, Charles H. Mitch, Darryle D. Schoepp, Rebecca A. True, David O. Calligaro, Patrick J. O’Malley, D Lodge, Paul L. Ornstein	1992	51
9	Density functional studies of free radicals: accurate geometry and hyperfine coupling prediction for semiquinone anions Chemical Physics Letters ·Patrick J. O’Malley, Simon J. Collins	1996	51
10	Proton Isomers Rationalize the High- and Low-Spin Forms of the S₂ State Intermediate in the Water-Oxidizing Reaction of Photosystem II The Journal of Physical Chemistry Letters ·Thomas A. Corry, Patrick J. O’Malley	2019	49
11	Evidence of O–O Bond Formation in the Final Metastable S₃ State of Nature’s Water Oxidizing Complex Implying a Novel Mechanism of Water Oxidation The Journal of Physical Chemistry Letters ·Thomas A. Corry, Patrick J. O’Malley	2018	46
12	Synthesis and properties of SAPO-5 molecular sieves. Silicon incorporation into the framework Journal of the Chemical Society Faraday Transactions ·Adeola F. Ojo, John Dwyer, J. Dewing, Patrick J. O’Malley, A. A. J. Nabhan	1992	44
13	Mechanistic aspects of hydrogen abstraction for phenolic antioxidants. Electronic structure and topological electron density analysis Physical Chemistry Chemical Physics ·Nakul Singh, Patrick J. O’Malley, Paul L. A. Popelier	2005	40
14	Density functional studies of the carbonium ion species CH+5, C2H+7 and C3H+9 Chemical Physics Letters ·Simon J. Collins, Patrick J. O’Malley	1994	38
15	5,7-Dichlorokynurenic acid, a potent and selective competitive antagonist of the glycine site on NMDA receptors Neuroscience Letters ·Dennis B. McNamara, Edward C. Smith, David O. Calligaro, Patrick J. O’Malley, Loretta A. McQuaid, Raymond Dingledine	1990	38
16	The cytotoxicity of ortho alkyl substituted 4-X-phenols: A QSAR based on theoretical bond lengths and electron densities Bioorganic & Medicinal Chemistry Letters ·R. Loader, Naval Singh, Patrick J. O’Malley, Paul L. A. Popelier	2005	37
17	Density functional calculated spin densities and hyperfine couplings for hydrogen bonded 1,4-naphthosemiquinone and phyllosemiquinone anion radicals: a model for the A1 free radical formed in Photosystem I Biochimica et Biophysica Acta (BBA) - Bioenergetics ·Patrick J. O’Malley	1999	37
18	Molecular Identification of a High-Spin Deprotonated Intermediate during the S₂ to S₃ Transition of Nature’s Water-Oxidizing Complex Journal of the American Chemical Society ·Thomas A. Corry, Patrick J. O’Malley	2020	37
19	1H, 13C and 17O principal hyperfine tensor determination for the p-benzosemiquinone anion radical using hybrid density functional methods Chemical Physics Letters ·Patrick J. O’Malley	1996	36
20	Effect of Hydrogen Bonding on the Spin Density Distribution and Hyperfine Couplings of the p-Benzosemiquinone Anion Radical in Alcohol Solvents: A Hybrid Density Functional Study The Journal of Physical Chemistry A ·Patrick J. O’Malley	1997	35

About Patrick J. O’Malley

Patrick J. O’Malley is a scholar working on Molecular Biology, Atomic and Molecular Physics, and Optics, Physical and Theoretical Chemistry, Organic Chemistry and Inorganic Chemistry, having authored 124 papers that have together received 2.3k indexed citations. Recurring topics across this work include Photosynthetic Processes and Mechanisms (46 papers), Spectroscopy and Quantum Chemical Studies (42 papers), Photochemistry and Electron Transfer Studies (30 papers), Free Radicals and Antioxidants (24 papers), Advanced Chemical Physics Studies (22 papers), Electron Spin Resonance Studies (20 papers), Zeolite Catalysis and Synthesis (14 papers) and Photoreceptor and optogenetics research (13 papers). The work is most often cited by research in Physical and Theoretical Chemistry (512 citations), Biophysics (315 citations), Inorganic Chemistry (533 citations), Atomic and Molecular Physics, and Optics (779 citations) and Organic Chemistry (555 citations). Patrick J. O’Malley has collaborated with scholars based in United Kingdom, United States and Russia. Frequent co-authors include Simon J. Collins, Stephen E. J. Rigby, Jonathan H. A. Nugent, Wagner B. De Almeida, Sergei A. Dikanov, Paul L. A. Popelier, Colin A. Wraight, Alexander T. Taguchi, David O. Calligaro and Edward C. Smith. Their work appears in journals such as Chemical Physics Letters, The Journal of Physical Chemistry B, Biochemistry, Journal of the American Chemical Society and The Journal of Physical Chemistry Letters.

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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Patrick J. O’Malley

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