Speciation in CO2-loaded aqueous solutions of sixteen triacetoneamine-derivates (EvAs) and elucidation of structure-property relationships

The speciation in CO2-loaded aqueous solutions of 16 different derivates triacetoneamine (EvAs) was investigated a comprehensive NMR-spectroscopic study. About 350 experiments were carried out for CO2-loadings up to 3 moles CO2 per mole amine, temperatures between 20 °C and 100 °C, mass fraction EvA the unloaded solvent 0.1 g/g. observed CO2-containing species primary secondary carbamates, alkylcarbonate, (bi)carbonate, molecular CO2. Some EvAs can form zwitterions with ring structure, which have an important influence on speciation. From set data, relationships chemical structure solution established. These results related application properties that taken from previous work. Based findings, some general guidelines design new amines derived applied proposing CO2-absorption.