Spectroscopic study of biogenic amine complexes formed at fumed silica surface

► Biogenic amines form outer-sphere electrostatic complexes at silica surface. ► Adsorbed biogenic amines are exposed to thermal deamination. ► Deamination process includes thermal transformation of two types of surface complexes. ► Kinetic parameters (activation energy) correlate with thermodynamic stability constants of biogenic amine surface complexes.