John E. O’Brien

2.9k citations

92 papers · 2.6k · h-index 25

Impact in

Toxicology top 0.5%
- Forensic Toxicology and Drug Analysis
Spectroscopy top 1%
- Molecular Sensors and Ion Detection

Papers in

Toxicology 27
- Forensic Toxicology and Drug Analysis 26
Organic Chemistry 25
- Supramolecular Chemistry and Complexes 5
- Structural and Chemical Analysis of Organic and Inorganic Compounds 5

Co-authors: Thorfinnur Gunnlaugsson (17 shared papers)Anthony P. Davis (2 shared papers)Mark Glynn (2 shared papers)Thomas McCabe (11 shared papers)Robert D. Peacock (5 shared papers)Pierce V. Kavanagh (26 shared papers)Joseph P. Leonard (2 shared papers)John D. Power (16 shared papers)
Journals: Drug Testing and Analysis (18 papers)Chemistry - A European Journal (5 papers)Forensic Science International (4 papers)Organic & Biomolecular Chemistry (4 papers)Chemical Communications (4 papers)
Partner nations: Ireland United Kingdom United States

In The Last Decade

John E. O’Brien

89 papers receiving 2.6k 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 92 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	425
2	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	188
3	Self-Assembly of Chiral Luminescent Lanthanide Coordination Bundles Journal of the American Chemical Society ·Joseph P. Leonard, Paul Jensen, Thomas McCabe, John E. O’Brien, Robert D. Peacock, Paul E. Kruger, Thorfinnur Gunnlaugsson	2007	171
4	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 Peter McCoy, Thorfinnur Gunnlaugsson	2009	140
5	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	101
6	Effect of Chiral Ligand Concentration and Binding Mode on Chiroptical Activity of CdSe/CdS Quantum Dots ACS Nano ·Vera A. Kuznetsova, Eric Mates‐Torres, Nadezda Prochukhan, Madeline Marcastel, Finn Purcell‐Milton, John E. O’Brien, Anastasia K. Visheratina, Marina Martínez‐Carmona	2019	96
7	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	89
8	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	2009	65
9	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	53
10	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, Cora O’Donnell, Rachel Christie, John D. Power, Seán D. McDermott +1 other	2011	51
11	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
12	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	47
13	Glycine–alanine conjugated macrocyclic lanthanide ion complexes as artificial ribonucleases Tetrahedron Letters ·Thorfinnur Gunnlaugsson, John E. O’Brien, Sinéad Mulready	2002	39
14	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
15	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
16	The effect of the linker size in C 2 -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 M. Feeney, Robert D. Peacock, Colin Peter McCoy	2018	36
17	Reduction of dipyrido-[3,2-a:2′,3′-c]-phenazine (dppz) by photolysis in ethanol solution Chemical Communications ·David A. McGovern, Ania Selmi, John E. O’Brien, John M. Kelly, Conor Long	2005	34
18	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 ·Conor N. O'Callaghan, T. Brian H. McMurry, John E. O’Brien	1995	32
19	Nonplanar Porphyrins by N‐Substitution: A Neglected Pathway European Journal of Organic Chemistry ·Marie Roucan, Keith J. Flanagan, John E. O’Brien, Mathias O. Senge	2018	30
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 Noel Talbot, John E. O’Brien, Pierce V. Kavanagh	2012	29

About John E. O’Brien

John E. O’Brien is a scholar working on Toxicology, Organic Chemistry, Materials Chemistry, Spectroscopy and Physical and Theoretical Chemistry, having authored 92 papers that have together received 2.6k indexed citations. Recurring topics across this work include Forensic Toxicology and Drug Analysis (26 papers), Lanthanide and Transition Metal Complexes (11 papers), Porphyrin and Phthalocyanine Chemistry (8 papers), Molecular spectroscopy and chirality (7 papers), Supramolecular Chemistry and Complexes (5 papers), Structural and Chemical Analysis of Organic and Inorganic Compounds (5 papers), Antimicrobial Peptides and Activities (4 papers) and Synthesis of Organic Compounds (4 papers). The work is most often cited by research in Toxicology (324 citations), Spectroscopy (736 citations), Organic Chemistry (639 citations), Materials Chemistry (688 citations) and Inorganic Chemistry (152 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, Thomas McCabe, Robert D. Peacock, Pierce V. Kavanagh, Joseph P. Leonard, John D. Power, Seán D. McDermott and Jonathan A. Kitchen. Their work appears in journals such as Drug Testing and Analysis, Chemistry - A European Journal, Forensic Science International, Organic & Biomolecular Chemistry and Chemical Communications.

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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