Spectroscopic studies of long carbon and silicon-carbon chains produced by laser ablation

Abstract

Long carbon and silicon-carbon chains are produced in solid Ar matrix at ?10K using laser ablation technique at TCU Physics Molecular Laboratory. The Fourier transform infrared investigation of the 13 C isotopic spectra of the products coupled with density functional theory calculations at the B3LYP/cc_pVDZ level has resulted in the identification of one long carbon chain cluster, linear C 12 , and two silicon-carbon clusters, SiC 7 and SiC 9 . For linear C 12 , three stretching modes are identified¿the ? 8 mode at 1997.2, ? 9 mode at 1818.0 and ? 7 mode at 2140.6 cm ?1 . However, due to the weak absorption of this mode, the ? 7 mode is considered tentative. For linear SiC 7 , for the first time, the ? 1 stretching mode is assigned at 2100.8 cm ?1 . For linear SiC 9 , for the first time, the ? 4 stretching mode is assigned at 1935.8 cm ?1 .