J.P. Colpa

1.4k citations

65 papers · 1.2k indexed · h-index 21

Impact in

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

Papers in

Spectroscopy 41
- Advanced NMR Techniques and Applications 24
- Molecular spectroscopy and chirality 18
- Molecular Spectroscopy and Structure 8
Physical and Theoretical Chemistry 19
- Photochemistry and Electron Transfer Studies 14

Co-authors: D. Stehlik James R. Bolton E. de Boer J. Α. Α. Ketelaar Karl H. Hausser F.P. Temme Richard E. Brown D. Schweitzer
Journals: Chemical Physics (20 papers)Molecular Physics (12 papers)The Journal of Chemical Physics (6 papers)Chemical Physics Letters (4 papers)Canadian Journal of Chemistry (2 papers)
Partner nations: Canada Germany Netherlands

In The Last Decade

J.P. Colpa

64 papers receiving 1.1k citations

Peers

Countries citing papers authored by J.P. Colpa

Since Specialization

Citations

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

Fields of papers citing papers by J.P. Colpa

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by J.P. Colpa. 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 J.P. Colpa. The network helps show where J.P. Colpa may publish in the future.

Co-authorship network

The 25 scholars most cited alongside J.P. Colpa, 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 J.P. Colpa Line = papers co-authored together J.P. Colpa links everyone, so they are left out of the graph.

All Works

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20 of 20 papers shown

#	Work
1	Schur functions over polyhedral lattice-point models: Contrasts in determinacy criteria for ((?1?2)?n) vs. ((?1?2,?,?m?(n/2))?n) partite SU(m)�?n?? group embeddings: SU(m)�?8??4 spin symmetry of [H11B] International Journal of Quantum Chemistry ·J.P. Colpa, F.P. Temme	2000	5
2	Spin symmetry and gel'fand patterns of higher SU2×ℓ n groups Zeitschrift für Physik D Atoms Molecules and Clusters ·F.P. Temme, J.P. Colpa	1992	1
3	Structure of MQ-NMR spin spaces under higher n- and (n)↓ symmetries. II. Γ/ (6)↓ subduced irreps for sixfold spin clusters pertaining to the molecular cage ion, [11BH]62− Chemical Physics ·J.P. Colpa, F.P. Temme	1991	20
4	Thermal and photochemical reactions of organotin with aminophenols. ESR and other spectroscopic study of a novel organotin radical complex of 2-amino-4-tert-butylphenol Organometallics ·Sandip K. Sur, J.P. Colpa	1989	3
5	Optically active free radicals: circular dichroism, optical absorption and emission and ESR studies on optically active 1S(+)- and 1R(−)-camphorquinone radicals Chemical Physics ·Sandip K. Sur, J.P. Colpa, J. K. S. Wan	1986	8
6	Contribution to the theory of microwave-induced optical nuclear polarization (MI ONP). Formal equivalence of microwave-induced and level-anticrossing optical nuclear polarization. Extremum values for polarization Chemical Physics ·J.P. Colpa	1984	7
7	Microwave-induced optical nuclear polarization (MI ONP) of benzophenone in dibromodiphenylether Chemical Physics ·Peter Bachert, H. Brunner, Karl H. Hausser, J.P. Colpa	1984	15
8	Symmetry considerations for solid-state photochemical hydrogen-abstraction reactions. Applications to fluorene doped with acridine and related systems Chemical Physics ·J.P. Colpa, D. Stehlik	1983	8
9	Interpretation of level-anticrossing phenomena in phosphorescence and optical nuclear polarization in organic crystals Molecular Physics ·Klaus‐Peter Dinse, J.P. Colpa, M. Deimling, Luis Ortolani, Karl H. Hausser	1982	6
10	Radio frequency (RF-) saturation spectroscopy as detected via optical nuclear polarization, mechanisms due to ESR and NMR transitions in excited triplet states Chemical Physics ·J.P. Colpa, D. Stehlik, Hans‐Martin Vieth	1980	9
11	Radical pair formation from excited states in doped aromatic crystals. II. Optical nuclear polarization (ONP) studies Chemical Physics ·V. Macho, J.P. Colpa, D. Stehlik	1979	35
12	The inequality formulation of Hund’s rule and a reinterpretation of singlet–triplet energy differences, generalized for molecules at equilibrium geometry The Journal of Chemical Physics ·J.P. Colpa, Richard E. Brown	1978	11
13	Optical nuclear polarization in molecular crystals through an optical excitation cycle Chemical Physics ·D. Stehlik, X. Y. Li, J.P. Colpa, M. Chen, J. A. Denny	1975	23
14	Transannular interactions in [2,2] phanes as studied by magnetic resonance and optical spectra Chemical Physics ·D. Schweitzer, J.P. Colpa, Irene Culcasi, Karl H. Hausser, Erick Molina- Guevara, Heinz A. Staab	1975	57
15	A Mechanism for the Optical Nuclear Spin Alignment in Zero Magnetic Field Zeitschrift für Naturforschung A ·J.P. Colpa, D. Stehlik	1972	5
16	Vibrational force constants of benzene: MO analysis Molecular Physics ·Danielle Besson, J.P. Colpa	1970	4
17	Signs of spin densities and vibronic interactions in 1- and 1,4-alkyl-substituted benzene anions The Journal of Physical Chemistry ·E. de Boer, J.P. Colpa	1967	35
18	Spin polarisation versus hyperconjugation in electron spin resonance spectra of substituted aromatic systems Physics Letters ·J.P. Colpa, E. de Boer	1963	3
19	The pressure-induced rotational absorption spectrum of hydrogen: II Molecular Physics ·J.P. Colpa, J. Α. Α. Ketelaar	1958	54
20	The pressure-induced rotational absorption spectrum of hydrogen: I Molecular Physics ·J.P. Colpa, J. Α. Α. Ketelaar	1958	38

About J.P. Colpa

J.P. Colpa is a scholar working on Spectroscopy, Physical and Theoretical Chemistry, Biophysics, Atomic and Molecular Physics, and Optics and Organic Chemistry, having authored 65 papers that have together received 1.2k indexed citations. Recurring topics across this work include Advanced NMR Techniques and Applications (24 papers), Advanced Chemical Physics Studies (21 papers), Molecular spectroscopy and chirality (18 papers), Solid-state spectroscopy and crystallography (16 papers), Photochemistry and Electron Transfer Studies (14 papers), Electron Spin Resonance Studies (12 papers), Spectroscopy and Quantum Chemical Studies (9 papers) and Molecular Spectroscopy and Structure (8 papers). The work is most often cited by research in Physical and Theoretical Chemistry (378 citations), Biophysics (204 citations), Spectroscopy (563 citations), Atomic and Molecular Physics, and Optics (579 citations) and Organic Chemistry (332 citations). J.P. Colpa has collaborated with scholars based in Canada, Germany and Netherlands. Frequent co-authors include D. Stehlik, James R. Bolton, E. de Boer, J. Α. Α. Ketelaar, Karl H. Hausser, F.P. Temme, Richard E. Brown, D. Schweitzer, E. L. Mackor and C. MacLean. Their work appears in journals such as Chemical Physics, Molecular Physics, The Journal of Chemical Physics, Chemical Physics Letters and Canadian Journal of 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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