In this paper we present the results of a theoretical study of triplet exciton dynamics in singlehyphen;strand polyadenilic acid. The triplet jump time was related to the intermolecular electronhyphen;exchange interactions, and to a semiempirical scattering time. Calculations of the intermolecular interactions were performed for five different structural models for the helical polymer. The theoretical results are consistent with the available experimental triplet energyhyphen;transfer data for this system, provided that the structure of singlehyphen;strand polyadenilic acid is close to that of RNA 11. For this structural model the nearesthyphen;neighbor triplethyphen;transfer integrals in polyadenilic acid are sim;thinsp;0.5 cmminus;1, and the estimated triplethyphen;exciton jump time istgr;jthinsp;sim;thinsp;10minus;9sec.
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