Ion mobility spectrometry and theoretical study for investigation of thermal decomposition, chemical ionization, and dimer formation of proline

Chemical ionization and thermal decomposition of proline have been investigated by corona discharge ion mobility spectrometry (CD-IMS) and high-level ab initio calculations. Five main peaks were observed in the ion mobility spectrum of proline at low cell temperatures while only two remained at high temperatures. Experimental and theoretical evidences were collected to link the observed peaks to the related ionic species. Two peaks were assigned...