John E. O’Brien

3.4k citations

97 papers · 3.1k · h-index 27

Impact in

Toxicology top 0.5%
- Forensic Toxicology and Drug Analysis
Spectroscopy top 0.5%
- Molecular Sensors and Ion Detection

Papers in

Organic Chemistry 30
Materials Chemistry 30
- Lanthanide and Transition Metal Complexes 11
- Luminescence and Fluorescent Materials 7

Co-authors: Thorfinnur Gunnlaugsson (17 shared papers)Anthony P. Davis (2 shared papers)Mark Glynn (2 shared papers)Christian Münch (1 shared paper)Anne Bertolotti (1 shared paper)Thomas McCabe (11 shared papers)Robert D. Peacock (5 shared papers)Pierce V. Kavanagh (26 shared papers)
Journals: Drug Testing and Analysis (18 papers)Chemistry - A European Journal (5 papers)Forensic Science International (4 papers)Chemical Communications (4 papers)Organic & Biomolecular Chemistry (4 papers)
Partner nations: Ireland United Kingdom United States

In The Last Decade

John E. O’Brien

95 papers receiving 3.0k citations

Peers

Countries citing papers authored by John E. O’Brien

Since Specialization

Citations

This map shows the geographic impact of John E. O’Brien'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 John E. O’Brien with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites John E. O’Brien more than expected).

Fields of papers citing papers by John E. O’Brien

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by John E. O’Brien. 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 John E. O’Brien. The network helps show where John E. O’Brien may publish in the future.

Co-authors

The 25 scholars most cited alongside John E. O’Brien, 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 John E. O’Brien Line = papers co-authored together John E. O’Brien 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 97 papers — load more, or switch the sort, to bring in the rest.

#	Work
1	Fluorescent Sensing of Pyrophosphate and Bis-carboxylates with Charge Neutral PET Chemosensors Organic Letters ·Thorfinnur Gunnlaugsson, Anthony P. Davis, John E. O’Brien, Mark Glynn	2002	423
2	Prion-like propagation of mutant superoxide dismutase-1 misfolding in neuronal cells Proceedings of the National Academy of Sciences ·Christian Münch, John E. O’Brien, Anne Bertolotti	2011	405
3	Synthesis and photophysical evaluation of charge neutral thiourea or urea based fluorescent PET sensors for bis-carboxylates and pyrophosphate Organic & Biomolecular Chemistry ·Thorfinnur Gunnlaugsson, Anthony P. Davis, John E. O’Brien, Mark Glynn	2004	186
4	Self-Assembly of Chiral Luminescent Lanthanide Coordination Bundles Journal of the American Chemical Society ·Joseph P. Leonard, Paul R. Jensen, Thomas McCabe, John E. O’Brien, Robert D. Peacock, Paul E. Kruger, Thorfinnur Gunnlaugsson	2007	169
5	Metal-Directed Synthesis of Enantiomerially Pure Dimetallic Lanthanide Luminescent Triple-Stranded Helicates Journal of the American Chemical Society ·Floriana Stomeo, Christophe Lincheneau, Joseph P. Leonard, John E. O’Brien, Robert D. Peacock, Colin P. McCoy, Thorfinnur Gunnlaugsson	2009	139
6	Colorimetric sensing of anions in aqueous solution using a charge neutral, cleft-like, amidothiourea receptor: tilting the balance between hydrogen bonding and deprotonation in anion recognition Organic & Biomolecular Chemistry ·Rebecca M. Duke, John E. O’Brien, Thomas McCabe, Thorfinnur Gunnlaugsson	2008	98
7	Effect of Chiral Ligand Concentration and Binding Mode on Chiroptical Activity of CdSe/CdS Quantum Dots ACS Nano ·Vera Kuznetsova, Eric Mates‐Torres, Nadezda Prochukhan, Madeline Marcastel, Finn Purcell‐Milton, John E. O’Brien, Anastasia Visheratina, Marina Martínez‐Carmona, Yulia Gromova, Max García‐Melchor, Yurii K. Gun’ko	2019	88
8	Synthesis, spectroscopic and biological studies of a fluorescent Pt(ii) (terpy) based 1,8-naphthalimide conjugate as a DNA targeting agent Chemical Communications ·Swagata Banerjee, Jonathan A. Kitchen, Sandra A. Bright, John E. O’Brien, D. Clive Williams, John M. Kelly, Thorfinnur Gunnlaugsson	2013	88
9	α-Lactalbumin, Engineered to be Nonnative and Inactive, Kills Tumor Cells when in Complex with Oleic Acid: A New Biological Function Resulting from Partial Unfolding Journal of Molecular Biology ·Jenny Pettersson-Kastberg, Ann‐Kristin Mossberg, Maria Trulsson, Yeon Joong Yong, Soyoung Min, Yoongho Lim, John E. O’Brien, Catharina Svanborg, K. Hun Mok	2009	66
10	The application of chiroptical spectroscopy (circular dichroism) in quantifying binding events in lanthanide directed synthesis of chiral luminescent self-assembly structures Chemical Science ·Oxana Kotova, Salvador Blasco, Brendan Twamley, John E. O’Brien, Robert D. Peacock, Jonathan A. Kitchen, Miguel Martínez‐Calvo, Thorfinnur Gunnlaugsson	2014	52
11	The analysis of substituted cathinones. Part 3. Synthesis and characterisation of 2,3-methylenedioxy substituted cathinones Forensic Science International ·Pierce V. Kavanagh, John E. O’Brien, John L. Fox, Cora O’Donnell, Rachel Christie, John D. Power, Seán D. McDermott	2011	50
12	Lanthanide Directed Self-Assembly of Highly Luminescent Supramolecular “Peptide” Bundles from α-Amino Acid Functionalized 2,6-Bis(1,2,3-triazol-4-yl)pyridine (btp) Ligands Inorganic Chemistry ·Joseph P. Byrne, Jonathan A. Kitchen, John E. O’Brien, Robert D. Peacock, Thorfinnur Gunnlaugsson	2015	49
13	Asymmetric acyl-transfer promoted by readily assembled chiral 4-N,N-dialkylaminopyridine derivatives Organic & Biomolecular Chemistry ·Ciarán Ó Dálaigh, Stephen J. Hynes, John E. O’Brien, Thomas McCabe, Declan J. Maher, Graeme W. Watson, Stephen J. Connon	2006	46
14	Glycine–alanine conjugated macrocyclic lanthanide ion complexes as artificial ribonucleases Tetrahedron Letters ·Thorfinnur Gunnlaugsson, John E. O’Brien, Sinéad Mulready	2002	39
15	Rare Earth Doped Silica Nanoparticles via Thermolysis of a Single Source Metallasilsesquioxane Precursor Scientific Reports ·Gemma‐Louise Davies, John E. O’Brien, Yurii K. Gun’ko	2017	38
16	The analysis of substituted cathinones. Part 2: An investigation into the phenylacetone based isomers of 4-methylmethcathinone and N-ethylcathinone Forensic Science International ·Seán D. McDermott, John D. Power, Pierce V. Kavanagh, John E. O’Brien	2011	36
17	The effect of the linker size in C₂-symmetrical chiral ligands on the self-assembly formation of luminescent triple-stranded di-metallic Eu(iii) helicates in solution Dalton Transactions ·Oxana Kotova, Steve Comby, Komala Pandurangan, Floriana Stomeo, John E. O’Brien, Martin Feeney, Robert D. Peacock, Colin P. McCoy, Thorfinnur Gunnlaugsson	2018	35
18	Reduction of dipyrido-[3,2-a:2′,3′-c]-phenazine (dppz) by photolysis in ethanol solution Chemical Communications ·David A. McGovern, A. M. Selmi, John E. O’Brien, John M. Kelly, Conor Long	2005	33
19	Synthetic reactions of 2-(2-amino-3-cyano-4H-[1]benzopyran-4-yl)propane-1,3-dinitrile with reactive methylene compounds Journal of the Chemical Society Perkin Transactions 1 ·C. N. O'CALLAGHAN, T. Brian H. McMurry, John E. O’Brien	1995	32
20	The analysis of amphetamine‐like cathinone derivatives using positive electrospray ionization with in‐source collision‐induced dissociation Rapid Communications in Mass Spectrometry ·John D. Power, Seán D. McDermott, Brian Talbot, John E. O’Brien, Pierce V. Kavanagh	2012	28

About John E. O’Brien

John E. O’Brien is a scholar working on Organic Chemistry, Materials Chemistry, Spectroscopy, Molecular Biology and Toxicology, having authored 97 papers that have together received 3.1k indexed citations. Recurring topics across this work include Forensic Toxicology and Drug Analysis (17 papers), Analytical Chemistry and Chromatography (12 papers), Lanthanide and Transition Metal Complexes (11 papers), Psychedelics and Drug Studies (10 papers), Magnetism in coordination complexes (9 papers), Molecular Sensors and Ion Detection (9 papers), Chemical Synthesis and Analysis (8 papers) and Luminescence and Fluorescent Materials (7 papers). The work is most often cited by research in Toxicology (246 citations), Spectroscopy (1.0k citations), Bioengineering (306 citations), Materials Chemistry (1.3k citations) and Organic Chemistry (725 citations). John E. O’Brien has collaborated with scholars based in Ireland, United Kingdom and United States. Frequent co-authors include Thorfinnur Gunnlaugsson, Anthony P. Davis, Mark Glynn, Christian Münch, Anne Bertolotti, Thomas McCabe, Robert D. Peacock, Pierce V. Kavanagh, Joseph P. Leonard and John D. Power. Their work appears in journals such as Drug Testing and Analysis, Chemistry - A European Journal, Forensic Science International, Chemical Communications and Organic & Biomolecular Chemistry.

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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