Chromogenic Chemosensors Based on Phenolic Imines for the Detection of Alkylamines and Lidocaine in Water and in the Vapor Phase

Three imines comprised of 5-nitrothiophen-2-yl as electron-accepting and phenols electrondonating groups were synthesized used chromogenic chemosensors to detect alkylamines. The compounds are colorless in water, but their deprotonation by the alkylamines generates corresponding colored phenolates, which can be those analytes. addition cetyltrimethylammonium bromide (CTAB) causes bathochromic shift perichromic band indicating that transferred into micelles. In addition, CTAB lowers pKa increases stability improving performance chemosensors. Applications prospected with adsorbed on strip papers water vapor phase. also solution for quantification lidocaine water. Thus, versatility studied allows think about applications industrial, environmental, pharmaceutical areas.