ESR studies of the triplet state of [n.n] paracyclophanes
dc.contributor.author | Bramwell, Fitzgerald B. | en_US |
dc.contributor.author | Gendell, Julien | en_US |
dc.date.accessioned | 2010-05-06T22:36:51Z | |
dc.date.available | 2010-05-06T22:36:51Z | |
dc.date.issued | 1973-01-15 | en_US |
dc.identifier.citation | Bramwell, Fitzgerald B.; Gendell, Julien (1973). "ESR studies of the triplet state of [n.n] paracyclophanes." The Journal of Chemical Physics 58(2): 420-427. <http://hdl.handle.net/2027.42/70725> | en_US |
dc.identifier.uri | https://hdl.handle.net/2027.42/70725 | |
dc.description.abstract | ESR experiments were performed on the triplet state of randomly oriented paracyclophanes in a variety of rigid glasses at temperatures ranging from 103 to 15°K. Spectra were recorded for [2.2]; [3.3]; (4,7,12,15)‐tetramethyl [2.2]‐paracyclophane and stagger‐ring paracyclophane. For all the samples except stagger ring, a four‐ringed paracyclophane, only the Hmin feature was observed from which D*, the root‐mean‐square zero‐field splitting, was calculated. For stagger ring the triplet spectrum has two features in the Δms = 1Δms=1 region in addition to the Hmin feature. From these, the zero‐field splittings, D and E, were calculated. The triplet spectra for the paracyclophanes show that there is strong transannular interaction with electron delocalization over all benzene rings. There is evidence for strongly coupled intramolecular exciton effects. The effect of increasing the inter‐ring separation from [2.2] paracyclophane to [3.3] paracyclophane is to decrease the transannular interaction. The effect of methyl substitution is to increase transannular effects relative to the parent compound. Transannular interactions in stagger ring are greater than in [2.2] paracyclophane despite the increased electron delocalization possible through the introduction of more than two rings. The large value of E for stagger ring represents a significant deviation from axial symmetry for the zero‐field‐splitting tensor and indicates that the methylene bridges, the methyl substituents, or the ring distortion, may make important contributions to the electronic distribution of the triplet state. | en_US |
dc.format.extent | 3102 bytes | |
dc.format.extent | 572623 bytes | |
dc.format.mimetype | text/plain | |
dc.format.mimetype | application/pdf | |
dc.publisher | The American Institute of Physics | en_US |
dc.rights | © The American Institute of Physics | en_US |
dc.title | ESR studies of the triplet state of [n.n] paracyclophanes | en_US |
dc.type | Article | en_US |
dc.subject.hlbsecondlevel | Physics | en_US |
dc.subject.hlbtoplevel | Science | en_US |
dc.description.peerreviewed | Peer Reviewed | en_US |
dc.contributor.affiliationum | Department of Chemistry, University of Michigan, Ann Arbor, Michigan | en_US |
dc.contributor.affiliationum | Department of Chemistry, Oakland University, Rochester, Michigan 48063 | en_US |
dc.description.bitstreamurl | http://deepblue.lib.umich.edu/bitstream/2027.42/70725/2/JCPSA6-58-2-420-1.pdf | |
dc.identifier.doi | 10.1063/1.1679221 | en_US |
dc.identifier.source | The Journal of Chemical Physics | en_US |
dc.identifier.citedreference | F. B. Bramwell and J. Gendell, J. Chem. Phys. 52, 5656 (1970). | en_US |
dc.identifier.citedreference | M. S. de Groot and J. H. van der Waals, Mol. Phys. 6, 545 (1963). | en_US |
dc.identifier.citedreference | P. Gantzel, C. L. Coulter, and K. N. Trueblood, Angew. Chem. 72, 755 (1960). | en_US |
dc.identifier.citedreference | C. J. Brown, J. Chem. Soc. (Lond.) 1953, 3265. | en_US |
dc.identifier.citedreference | K. Lonsdale, H. J. Milledge, and K. V. K. Rao, Proc. R. Soc. A 255, 82 (1960). | en_US |
dc.identifier.citedreference | P. Gantzel and K. N. Trueblood, Acta Crystallogr. 18, 958 (1965). | en_US |
dc.identifier.citedreference | F. Gerson and W. B. Martin, Jr., J. Am. Chem. Soc. 91, 1883 (1969). | en_US |
dc.identifier.citedreference | D. J. Wilson, V. Boekelheide, and R. W. Griffin, Jr., J. Am. Chem. Soc. 82, 6302 (1960). | en_US |
dc.identifier.citedreference | M. T. Vala, Jr., J. Haebig, and S. A. Rice, J. Chem. Phys. 43, 886 (1965). | en_US |
dc.identifier.citedreference | M. T. Vala, Jr., I. H. Hiller, S. A. Rice, and J. Jortner, J. Chem. Phys. 44, 23 (1966). | en_US |
dc.identifier.citedreference | A. Ron and O. Schnepp, J. Chem. Phys. 44, 19 (1966). | en_US |
dc.identifier.citedreference | J. W. Longworth and F. A. Bovey, 4, 115 (1966). | en_US |
dc.identifier.citedreference | D. T. Longone and C. L. Warren, J. Am. Chem. Soc. 84, 1507 (1962). | en_US |
dc.identifier.citedreference | D. T. Longone and H. S. Chow, J. Am. Chem. Soc. 88, 509 (1966). | en_US |
dc.identifier.citedreference | I. H. Hiller, L. Glass, and S. A. Rice, J. Chem. Phys. 45, 3015 (1966). | en_US |
dc.identifier.citedreference | R. C. Helgeson and D. J. Cram, J. Am. Chem. Soc. 91, 3553 (1966). | en_US |
dc.identifier.citedreference | C. A. Hutchison, Jr. and B. W. Magnum, J. Chem. Phys. 34, 908 (1961). | en_US |
dc.identifier.citedreference | P. Kottis and R. Lefebvre, J. Chem. Phys. 41, 379 (1964). | en_US |
dc.identifier.citedreference | J. Lhoste, A. Haug, and M. Ptak, J. Chem. Phys. 44, 654 (1966). | en_US |
dc.identifier.citedreference | A. W. Hornig and J. S. Hyde, Mol. Phys. 6, 33 (1963). | en_US |
dc.identifier.citedreference | S. Siegel and K. Eisenthal, J. Chem. Phys. 42, 2494 (1965). | en_US |
dc.identifier.citedreference | H. B. Steen, Photochem. Photobiol. 9, 479 (1969). | en_US |
dc.identifier.citedreference | F. Smith, A. T. Armstrong, and S. P. McGlynn, J. Chem. Phys. 44, 442 (1966). | en_US |
dc.identifier.citedreference | J. T. S. Andrews and E. F. Westrum, Jr., J. Chem. Phys. 74, 2170 (1970). | en_US |
dc.identifier.citedreference | M. Sheehan and D. J. Cram, J. Am. Chem. Soc. 91, 3553 (1969). | en_US |
dc.identifier.citedreference | M. Sheehan and D. J. Cram, J. Am. Chem. Soc. 91, 3544 (1969). | en_US |
dc.identifier.citedreference | M. Godfrey, C. W. Kern, and M. Karplus, J. Chem. Phys. 44, 4459 (1967). | en_US |
dc.identifier.citedreference | B. Smaller, E. C. Avery, and J. R. Remko, J. Chem. Phys. 46, 3976 (1967). | en_US |
dc.identifier.citedreference | E. Wasserman, L. C. Snyder and W. A. Yager, J. Chem. Phys. 41, 1763 (1964). | en_US |
dc.owningcollname | Physics, Department of |
Files in this item
Remediation of Harmful Language
The University of Michigan Library aims to describe library materials in a way that respects the people and communities who create, use, and are represented in our collections. Report harmful or offensive language in catalog records, finding aids, or elsewhere in our collections anonymously through our metadata feedback form. More information at Remediation of Harmful Language.
Accessibility
If you are unable to use this file in its current format, please select the Contact Us link and we can modify it to make it more accessible to you.