Carbonaceous molecules are of importance in diverse scientific areas such as astrochemistry, material science, structural chemistry and theoretical chemistry. Carbon-rich chains in particular are abundant ingredients of molecular clouds and circumstellar shells. In this talk, recent efforts towards spectroscopic characterization of neutral and charged carbon-rich chains harboring selected heavy elements (Si, Ge, O, S, Se, Te) will be presented. For the most part, neutral chains were studied at high spectral resolution using a combination of laser ablation production and infrared laser spectroscopy. Charged carbon-rich chains were observed employing state-of-the-art ion trap machinery and optical parametric oscillators (in Cologne) as well as the Free Electron Laser for Infrared eXperiments, FELIX, at Nijmegen (Netherlands). Spectroscopic analyses have been greatly supported by high-level quantum-chemical calculations of molecular structures and force fields performed at the CCSD(T) level of theory.

High resolution spectroscopic studies of neutral and charged carbon-rich chains

ACS Fall 2021

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