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Zero field optically detected magnetic resonance of multiple localized states in 1,4-dibromonaphthalene crystals

Nishimura, A. M. and Zewail, A. H. and Harris, C. B. (1975) Zero field optically detected magnetic resonance of multiple localized states in 1,4-dibromonaphthalene crystals. Journal of Chemical Physics, 63 (5). pp. 1919-1925. ISSN 0021-9606. http://resolver.caltech.edu/CaltechAUTHORS:NISjcp75

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Abstract

A systematic study of the localized states of 1,4-dibromonaphthalene was made, both as a dilute guest in a host crystal and as a trap site in the neat crystal, utilizing zero field magnetic resonance techniques. The kinetic parameters associated with the various ''localized'' triplet states have been determined. These include the relative intersystem crossing rates, the relative radiative rates from the spin states to the electronic and vibronic origins, and the total depletion rates from the individual spin sublevels. The results of these studies indicate that the correlation of the magnetic structure of trap states and the energy difference between traps and a host band is not straightforward, even for one-dimensional systems. Moreover, these results imply that spin exchange and equilibrium between traps and band states can severely influence the dynamics of energy migration and must be incorporated into any temperature dependent line shape analysis of the exciton transitions, particularly for 1,4-dibromonaphthalene because of the similarity in trap and exciton EPR frequencies.


Item Type:Article
Additional Information:Copyright © 1975 American Institute of Physics. (Received 4 March 1975) This work was supported in part by a grant from the National Science Foundation and in part by the Inorganic Materials Research Division of the Lawrence Berkeley Laboratory under the auspices of the U.S. Energy Research and Development Administration. [C.B.H. was an] Alfred P. Sloan Fellow.
Record Number:CaltechAUTHORS:NISjcp75
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:NISjcp75
Alternative URL:http://dx.doi.org/10.1063/1.431580
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:10977
Collection:CaltechAUTHORS
Deposited By: Archive Administrator
Deposited On:21 Jun 2008
Last Modified:26 Dec 2012 10:07

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