Abstract:
The detrimental effects caused by the presence of biogenic amines in food samples render them an
important parameter for evaluating food quality. In the current report, a facile fluorescent Biginelli based
receptor 1 has been prepared through a multicomponent reaction between pyridine-2-carbaldehyde, methyl
acetoacetate and 2-aminobenzimidazole in a single pot using a zinc perchlorate catalyst. Subsequently, the
receptor 1 was processed to obtain aqueous phase organic nanoparticles, N1, which were characterized
using DLS and TEM. Fluorescence spectroscopy studies in aqueous media revealed that the organic
nanoparticles show interesting potential for Ag(I) recognition with a fluorescence ‘‘turn-off’’ mechanism. The
resultant Ag–receptor complex, N1.Ag(I), was further found to bind with tyramine (limit of detection: 3.91 nM)
and 1,2-diaminopropane (limit of detection: 4.21 nM) through unquenching of fluorescence.
