Infrared bands of mass-selected carbon chains C-n (n=8-12) and C-n(-) (n=5-10, 12) in neon matrices

Infrared bands of carbon chains C-n (n = 8-12) and C-n(-) (n = 5-10,12) have been observed in neon matrices in the 1600-2100 cm(-1) region. The matrices were grown at 5 K by codepositing mass-selected carbon anions with excess of neon. The neutral carbon chains were obtained from the anions by photodetachment. The assignments of the infrared transitions are based on mass-selection, photobleaching behaviour, intensity correlation with the known electronic transitions, and available ab initio calculations.