Probing the geometry reorganization from solution to gas-phase in putrescine derivatives by IRMPD, 'ANTPOT. 1H-NMR' and theoretical calculations - Correra, Thiago Carita; Fernandes, André Santos; Reginato, Marcelo Mota; Ducati, Lucas Colucci; Berden, Giel; Oomens, Jos (Physical Chemistry Chemical Physics, 2017)