dc.creator Le, T. H. en_US dc.creator Graham, W. R. M. en_US dc.date.accessioned 2012-07-09T18:55:16Z dc.date.available 2012-07-09T18:55:16Z dc.date.issued 2012 en_US dc.identifier 2012-MJ-10 en_US dc.identifier.uri http://hdl.handle.net/1811/52194 dc.description Author Institution: Department of Physics and Astronomy, Texas Christian University, Fort Worth, TX 76129 en_US dc.description.abstract This paper follows preliminary results on the SiC$_{5}$ molecule presented earlier. An absorption at 936.9 $\pm$ 0.2 cm$^{-1}$ has been identified as the $\nu_{4}(\sigma)$ Si-C stretching fundamental of linear SiC$_{5}$. Its assignment has been confirmed by the close agreement between DFT predicted and observed $^{13}$C isotopic shifts. DFT-B3LYP calculations predict that two other C-C fundamentals, $\nu_{1}(\sigma)$ and $\nu_{2}(\sigma)$ of SiC$_{5}$ should have intensities 10 to 15 times stronger than $\nu_{4}(\sigma)$, but would appear in the C-C stretching frequency regions. Refinements of the Si-C laser ablation techniques have helped to reveal the isotopic $^{13}$C shifts for two additional absorptions at 2045.0 and 1992.9 cm$^{-1}$. Comparison of their observed isotopic shifts with the predictions of DFT calculations at the MPW1PW91/6-311+G(3fd) level have led to their assignment to the $\nu_{1}(\sigma)$ and $\nu_{2}(\sigma)$ fundamentals of SiC$_{5}$. en_US dc.language.iso en en_US dc.publisher Ohio State University en_US dc.title FTIR AND DFT STUDY OF THE VIBRATIONAL SPECTRUM OF SiC$_{5}$ TRAPPED IN SOLID Ar en_US dc.type Article en_US dc.type Image en_US dc.type Presentation en_US
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