ANALYSIS OF IR-SPECTRA OF CARBON CLUSTERS TRAPPED IN NOBLE-GAS MATRICES USING ALGORITHMS BASED ON DIGITAL FILTERING TECHNIQUES

IR spectra of carbon clusters C-n (n greater than or equal to 3) trapp ed in noble gas matrices (Ar and Kr) at temperatures of 13, 30 and 35 K are analyzed using algorithms based on digital filtering techniques and non-linear least-squares fitting. The spectral features at differe nt temperatures and in different matrices are discussed. The majority of the resolved lines are assigned to C-n cluster species based on dat a obtained via quantum chemical computations and from tunable laser IR spectrometry of C-n species in the gas phase. A complete analysis of the IR spectra is available upon request.