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dc.creatorJohnson, Bruce R.en_US
dc.creatorSimpson, William T.en_US
dc.date.accessioned2006-06-15T13:50:43Z
dc.date.available2006-06-15T13:50:43Z
dc.date.issued1976en_US
dc.identifier1976-TR-4en_US
dc.identifier.urihttp://hdl.handle.net/1811/9878
dc.description$^{1}$ A. Gatterer, G. Piccardi, and F. Vincenzi, Ricerche Spettr. Lab. Astrofis. Specola Vaticana 1, 181 (1942). $^{2}$ R. F. Barrow and A. H. Chojnicki, J. C. S., Faraday Trans. II, 71 (4), 728 (1975).en_US
dc.descriptionAuthor Institution: Department of Chemistry, University of Oregonen_US
dc.description.abstractMetallic reflection occurs in molecular crystals when a stopping band, associated with a strong molecular electronic transition, emerges. There are interesting variations in reflectivity over the band, and we report here a calculation of the reflection bandshape for two specific cases -- 1,5-bis-(dimethylamino)pentamethinium perchlorate (BDP) and tetracyanoquinodimethane (TCNQ). Variations in reflectivity are described by a frequency dependent damping term $\Gamma (\omega)$ in the expression for the polarizability. For the case of one molecule per unit cell (BDP), the observed reflection bandshape can be matched using a theoretical expression $\Gamma (\omega)=(\gamma^{2}/N)\Sigma_{k} 1/(\omega-\omega_{k}-\Delta)$ where $\gamma$ is the single molecule vibrational relaxation constant and $\Delta$ is the frequency of the active vibration. For the more complicated case of two molecules per unit cell (TCNQ) a similar theoretical expression predicts a reflection spectrum much richer in structure than in the case of one molecule per unit cell, which moreover, is in substantial agreement with the observed spectrum of TCNQ.en_US
dc.format.extent132784 bytes
dc.format.mimetypeimage/jpeg
dc.language.isoEnglishen_US
dc.publisherOhio State Universityen_US
dc.titleMETALLIC REFLECTION IN MOLECULAR CRYSTALS: THEORY OF THE DAMPINGen_US
dc.typearticleen_US


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