Experimental determination of molecular vibrational energies from Terahertz rotational spectra of Isoprene.

Rotational spectroscopy in astronomy studies the rotational transitions of molecules in star-forming regions called molecular clouds. This technique helps explore the chemical, physical, and dynamic evolution of celestial bodies. Advances in sensitivity and angular resolution in remote sensing observations by labs like JPL and ALMA have enhanced the accuracy of temperature and density estimates in these clouds. Isoprene, a key molecule in dust formation in the interstellar medium and a major non-methane organic compound on Earth, influences ozone production, atmospheric oxidation, and the nitrogen cycle. This study aims to determine vibrational energies and associated uncertainties from the rotational spectra of Isoprene.