J.P. Colpa

Queen's University — Canada

Chemistry · Physical Sciences

21h-index1.4kcitations75works0.02yr avg
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Research Topics

Advanced NMR Techniques and Applications(29), Advanced Chemical Physics Studies(21), Molecular spectroscopy and chirality(21), Solid-state spectroscopy and crystallography(17), Photochemistry and Electron Transfer Studies(14)

Publications75 total

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·2000· 7 cited
Schur functions over polyhedral lattice-point models: Contrasts in determinacy criteria for ((λ1λ2)⊢n) vs. ((λ1λ2,…,λm≤(n/2))⊢n) partite SU(m)×Sn↓G group embeddings: SU(m)×S8↓D4 spin symmetry of [H11B]\documentclass{article}\pagestyle{empty}\begin{document}$_{8}^{2-}$\end{document}
International Journal of Quantum Chemistry·2000
Physical role of -invariants in dual mappings over carrier spaces for Liouville multiple-quantum NMR of spin clusters within n-automorphisms: , -cubanes and some SU(6) aspects of a -met-carb
Physica A Statistical Mechanics and its Applications·1994· 7 cited
Symmetry substructures for MQ-NMR of [A]20 spin clusters of dodecahedranes, [13CH]20 or [13CD]20, metallic M @M20 and [H2O]+ @[H2O]20 exo-cage cluster molecules and their higher-n SO(3) ×l n spin algebras, within the context of mapping,l n -ITP algebras and number partitions
Zeitschrift für Physik D Atoms Molecules and Clusters·1993· 8 cited
Demonstration of the origins of cooperativity within SU2�L 6 mapping over $$\left\{ {I\tilde H_\upsilon } \right\}$$ Liouvillian carrier subspaces characterising the MQ-NMR cluster [A]6(L 6) and its $$\{ |kq\upsilon :[\tilde \lambda ] > > \} $$ tensorial bases
The European Physical Journal B·1992· 8 cited
Spin symmetry and gel'fand patterns of higher SU2×ℓ n groups
Zeitschrift für Physik D Atoms Molecules and Clusters·1992· 1 cited
Summary ofS n mapping properties of some lexicalp-tuples, or wordlengths, over (M 1-M 2) fields of Rota-Cayley algebra in generating Hilbert space SO(3) xS n irreps of higherI i identical spin clusters, [A] n (S n ), forn ? 7
Journal of Mathematical Chemistry·1992· 5 cited
Aspects of<i>J</i>pathways in [A]<sub><i>n</i></sub>/[AX] spin systems over partitional, or coherent superpositional, Liouville space bases involving intracluster coupling, or associated with coherence transfer in [A…X] (<i>I<sub>i</sub></i>= 1/2) systems: further group theoretical considerations
Molecular Physics·1991· 17 cited
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·1991· 20 cited
Structure of MQ-NMR spin spaces under higher n- and (n)↓ symmetries. III. Γ/ ((7)↓D5) subduced irreps for [A ]7 clusters pertaining to the molecular cage ion, [11BH]72−
Chemical Physics·1991· 6 cited
Aspects Of SU2 × ϕn Liouvillian Duality and SU2/SO(3) × (ϕ12 ↓ A5) Symmetry Over Spin (Spin-Isomorphic) Spaces Of MO-NMR and Ouantum-Rotational Tunnelling Problems
1990
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·1989· 4 cited
ESR Characterizations and Photochemistry of the Free Radical Species from 1,1′-Bi-2-Naphthol and Related Compounds
Spectroscopy Letters·1989· 2 cited
Intermolecular H-tunneling in a solid state photoreaction promoted by distinct low-energy nuclear fluctuation modes
Chemical Physics·1989· 43 cited
A mathematical model for time-resolved radiofrequency-induced optical nuclear polarization
Chemical Physics·1989
The lineshape of quadrupolar satellites in level anticrossing (LAC) optical nuclear polarization (ONP) spectra
Chemical Physics·1988· 4 cited
Contribution to the theory of time-resolved microwave-induced optical nuclear polarization. Theoretical extremum values for the induced polarization
Chemical Physics·1988· 3 cited
Identification of the lowest energy nuclear fluctuation modes promoting the photochemical H-transfer tunneling reaction in doped fluorene single crystals
The Journal of Chemical Physics·1988· 42 cited
Optically active free radicals: circular dichroism, optical absorption and emission and ESR studies on optically active 1S(+)- and 1R(−)-camphorquinone radicals
Chemical Physics·1986· 11 cited
Optically active free radicals: circular dichroism of vitamin E acetate radical cation
Chemical Physics Letters·1986· 6 cited
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Frequent Co-authors

D. Stehlik(12), Karl H. Hausser(8), F.P. Temme(6), J. Α. Α. Ketelaar(4), E. de Boer(3), D. Schweitzer(3), B. Prass(3), Richard E. Brown(3), M. W. Haenel(2), Heinz A. Staab(2), M. Deimling(2), H. Brunner(2), Klaus‐Peter Dinse(2), Erwin Buncel(2), B. C. Menon(2), J. K. S. Wan(2), Sandip K. Sur(2), J. Rowat(2), James R. Bolton(1), Jacqlynn S. Behnke(1)