Alan C. Hopkinson

7.6k citations

255 papers · 6.7k indexed · 1 hit paper · h-index 42

Spectroscopy top 0.1%
Organic Chemistry top 0.5%
Atomic and Molecular Physics, and Optics top 1%
Molecular Biology top 10%
Physical and Theoretical Chemistry top 0.5%

Co-authors: K. W. Michael Siu Christopher F. Rodriquez Min H. Lien Diethard K. Böhme Tamer Shoeib Michael G. Organ Ivan K. Chu Gregory A. Chass
Topics: Advanced Chemical Physics Studies (125 papers)Mass Spectrometry Techniques and Applications (90 papers)Analytical Chemistry and Chromatography (42 papers)
Cited by: Spectroscopy Organic Chemistry Physical and Theoretical Chemistry
Journals: Journal of the American Chemical Society Angewandte Chemie International Edition The Journal of Chemical Physics
Partner nations: Canada United Kingdom Hong Kong

In The Last Decade

Alan C. Hopkinson

248 papers receiving 6.5k citations

Hit Papers

align trajectories

What are hit papers?

Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies if it has ≥500 total citations, achieves ≥1.5× the top-1% citation threshold for papers in the same subfield and year (this is the minimum needed to enter the top 1%, not the average within it), or reaches the top citation threshold in at least one of its specific research topics.

Easily Prepared Air‐ and Moisture‐Stable Pd–NHC (NHC=N‐Heterocyclic Carbene) Complexes: A Reliable, User‐Friendly, Highly Active Palladium Precatalyst for the Suzuki–Miyaura Reaction

2006 727 citations Christopher J. O’Brien, Eric Assen B. Kantchev et al. Chemistry - A European Journal profile →

Peers

Countries citing papers authored by Alan C. Hopkinson

Since Specialization

Citations

This map shows the geographic impact of Alan C. Hopkinson'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 Alan C. Hopkinson with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Alan C. Hopkinson more than expected).

Fields of papers citing papers by Alan C. Hopkinson

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Alan C. Hopkinson. 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 Alan C. Hopkinson. The network helps show where Alan C. Hopkinson may publish in the future.

Co-authorship network of co-authors of Alan C. Hopkinson

This figure shows the co-authorship network connecting the top 25 collaborators of Alan C. Hopkinson. A scholar is included among the top collaborators of Alan C. Hopkinson based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with Alan C. Hopkinson. Alan C. Hopkinson is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

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20 of 20 papers shown

#	Work	Indexed citations
1	Structure and fragmentation chemistry of the peptide radical cations of glycylphenylalanylglycine (GFG) 2024 ·PLoS ONE ·(unknown),Justin Kai‐Chi Lau,(unknown),Jonathan Martens,Giel Berden,Jos Oomens,Alan C. Hopkinson,K. W. Michael Siu,Ivan K. Chu	0
2	Generation, Characterization, and Dissociation of Radical Cations Derived from Prolyl-glycyl-glycine 2021 ·The Journal of Physical Chemistry B ·Justin Kai‐Chi Lau,(unknown),Giel Berden,Jos Oomens,Alan C. Hopkinson,Victor Ryzhov,K. W. Michael Siu	1
3	Dissociative electron transfer of copper(ii) complexes of glycyl(glycyl/alanyl)tryptophanin vacuo: IRMPD action spectroscopy provides evidence of transition from zwitterionic to non-zwitterionic peptide structures 2020 ·Physical Chemistry Chemical Physics ·(unknown),Mengzhu Li,(unknown),Justin Kai‐Chi Lau,Jonathan Martens,Giel Berden,Jos Oomens,De‐Cai Fang,Alan C. Hopkinson,K. W. Michael Siu,Chi‐Kit Siu,Ivan K. Chu	4
4	Loss of water from protonated polyglycines: interconversion and dissociation of the product imidazolone ions 2018 ·Physical Chemistry Chemical Physics ·(unknown),Justin Kai‐Chi Lau,(unknown),Ivan K. Chu,Jonathan Martens,Giel Berden,Jos Oomens,Alan C. Hopkinson,K. W. Michael Siu	4
5	Intramolecular hydrogen atom migration along the backbone of cationic and neutral radical tripeptides and subsequent radical-induced dissociations 2012 ·Physical Chemistry Chemical Physics ·Junfang Zhao,Tao Song,Minjie Xu,Quan Quan,K. W. Michael Siu,Alan C. Hopkinson,Ivan K. Chu	31
6	Doubly charged protonated a ions derived from small peptides 2011 ·Physical Chemistry Chemical Physics ·(unknown),Junfang Zhao,K. W. Michael Siu,Alan C. Hopkinson	3
7	A comparison of the fragmentation pathways of [Cu ^II (M _a )(M _b )] ^•2+ complexes where M _a and M _b are peptides containing either a tryptophan or a tyrosine residue 2010 ·Rapid Communications in Mass Spectrometry ·Yuyong Ke,Houssain El Aribi,Chi‐Kit Siu,K. W. Michael Siu,Alan C. Hopkinson	5
8	Density Functional Theory Investigation of the Alkyl–Alkyl Negishi Cross‐Coupling Reaction Catalyzed by N‐Heterocyclic Carbene (NHC)–Pd Complexes 2009 ·Chemistry - A European Journal ·Gregory A. Chass,Christopher J. O’Brien,Niloufar Hadei,Eric Assen B. Kantchev,Wei‐Hua Mu,De‐Cai Fang,Alan C. Hopkinson,Imre G. Csizmadia,Michael G. Organ	85
9	Threshold Collision-Induced Dissociation Measurements Using a Ring Ion Guide as the Collision Cell in a Triple-Quadrupole Mass Spectrometer 2009 ·Analytical Chemistry ·(unknown),Udo H. Verkerk,Chi‐Kit Siu,Alan C. Hopkinson,K. W. Michael Siu	7
10	Dipositively Charged Protonated a₃ and a₂ Ions: Generation by Fragmentation of [La(GGG)(CH₃CN)₂]³⁺ 2008 ·Angewandte Chemie International Edition ·(unknown),Chi‐Kit Siu,K. W. Michael Siu,Alan C. Hopkinson	11
11	Structure of the Observable Histidine Radical Cation in the Gas Phase: A Captodative α‐Radical Ion 2008 ·Angewandte Chemie International Edition ·Jeffrey D. Steill,Junfang Zhao,Chi‐Kit Siu,Yuyong Ke,Udo H. Verkerk,Jos Oomens,Robert C. Dunbar,Alan C. Hopkinson,K. W. Michael Siu	55
12	Are the Radical Centers in Peptide Radical Cations Mobile? The Generation, Tautomerism, and Dissociation of Isomeric α-Carbon-Centered Triglycine Radical Cations in the Gas Phase 2008 ·Journal of the American Chemical Society ·Ivan K. Chu,Junfang Zhao,Minjie Xu,S. O. Siu,Alan C. Hopkinson,K. W. Michael Siu	81
13	Gas‐phase fragmentation of protonated benzodiazepines 2007 ·Rapid Communications in Mass Spectrometry ·Antonella Risoli,(unknown),Udo H. Verkerk,Junfang Zhao,Gaetano Ragno,Alan C. Hopkinson,K. W. Michael Siu	16
14	The cysteine radical cation: structures and fragmentation pathways 2007 ·Physical Chemistry Chemical Physics ·Junfang Zhao,K. W. Michael Siu,Alan C. Hopkinson	30
15	Silver Ion Binding Energies of Amino Acids: Use of Theory to Assess the Validity of Experimental Silver Ion Basicities Obtained from the Kinetic Method 2002 ·The Journal of Physical Chemistry A ·Tamer Shoeib,K. W. Michael Siu,Alan C. Hopkinson	144
16	Direct observation and reactivities of benzoyl- and methoxycarbonyldiphenylmethyl cations 1983 ·Journal of the Chemical Society Chemical Communications ·Alan C. Hopkinson,Lê H. Dao,(unknown),(unknown),Edward Lee‐Ruff	11
17	Singlet oxygenation of but-1-en-3-ynes: on the possible intermediacy of a 1,2-dioxacyclohexa-3,4-diene 1983 ·Journal of the Chemical Society Chemical Communications ·Edward Lee‐Ruff,(unknown),(unknown),(unknown),Alan C. Hopkinson	4
18	Acid-catalyzed reactions of cyclobutanones. III. Formation of substituted 2-tetralones from α-phenylcyclobutanones 1978 ·Canadian Journal of Chemistry ·(unknown),Alan C. Hopkinson,Edward Lee‐Ruff	15
19	A quantum chemical study on electrophilic addition 1975 ·Theoretical Chemistry Accounts ·Alan C. Hopkinson,Min H. Lien,Keith Yates,Imre G. Csizmadia	24
20	The electronic spectra of diphenylmethyl carbonium ions 1972 ·Journal of the Chemical Society Perkin Transactions 2 ·(unknown),Alan C. Hopkinson,Edward Lee‐Ruff	2

About Alan C. Hopkinson

Alan C. Hopkinson is a scholar working on Spectroscopy, Physical and Theoretical Chemistry and Atomic and Molecular Physics, and Optics, having authored 255 papers that have together received 6.7k indexed citations. Recurring topics across this work include Advanced Chemical Physics Studies (125 papers), Mass Spectrometry Techniques and Applications (90 papers) and Analytical Chemistry and Chromatography (42 papers). The work is most often cited by research in Spectroscopy (3.1k citations), Organic Chemistry (2.8k citations) and Physical and Theoretical Chemistry (794 citations). Alan C. Hopkinson has collaborated with scholars based in Canada, United Kingdom and Hong Kong. Frequent co-authors include K. W. Michael Siu, Christopher F. Rodriquez, Min H. Lien, Diethard K. Böhme, Tamer Shoeib, Michael G. Organ, Ivan K. Chu, Gregory A. Chass, Cory Valente and Imre G. Csizmadia. Their work appears in journals such as Journal of the American Chemical Society, Angewandte Chemie International Edition and The Journal of Chemical Physics.

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