A new fluorescent nano-chemosensor using a N2O2 type macrocyclic ligand

A new fluorescent nano-chemosensor (l) has been synthesized and characterized by 1h nmr, 13c nmr, cosy, hsqc, dept, ir spectroscopy, elemental analyses and scanning electron microscopy. the fluorescent nano-chemosensors with size about 30 nm were prepared by nanoprecipitation method. the chemosensor l showed selectivity to al3+ and cr3+ cations in etoh/h2o (1:1, v/v) mixture. this chemosensor also exhibited an improved sensitivity and selectivity to al3+ and cr3+ cations when used as insoluble nanoparticles in aqueous buffer solution.