Molecule N-[3-(Dimethylamino) phenyl] thiophene-2-carboxamide nanoparticle (DPCNPs) was synthesized for detect cadmium metal in Aqueous Medium Based on Fluorescent quenching. Cd+2 particularly is emitted into the environment via fertilizers of abundant phosphate, and prolonged Cd+2 contact can cause bone weakening and damage to the internal organs. Its characteristics and fluorescence behavior were studied. Dynamic light scattering (DLS) was utilized to test the prepared NDPCNPs which reveal a narrower distribution of the sizes of the particles of 60 nm which is the average particles size. The scanning electron microphotograph (SEM) shows distinctive nano-particles of morphology in a spherical shape. The (DPCNPs) aqueous suspension fluorescence spectra and UV-absorption are blue shifted from the congruous of N-[3-(Dimethylamino) phenyl] thiophene-2-carboxamide solution spectra in acetonitrile. Such shifted blue color indicates the Aggregation Induced Enhanced Emission (AIEE) and H-aggregates from nano-particles. The (DPCNPs) nano-particles are of stability being high with surfactant of Tween80. Therefore, the effects of few metal cations on the fluorescent (DPCNPs) intensity were investigated. It was detected that fluorescence modified (DPCNPs) intensity was quenched selectively through Cd (II) ion addition compared to with other tested cations. The (DPCNPs) can be utilized as chemosensor being fluorescent bulk for Cd (II) ions detection. The quenching of fluorescent is linear at 25 to 225 µM range of ions of Cd (II). The detection limit was 1.47µM. The nanosensor displays a great selectivity versus ions of Cd (II) compared to communal metal ions. The suggested method applicability for detecting Cd+ metal in water samples collected from the Al Habbaniya Lake (Iraq) were calculated.

N-[3-(Dimethylamino) phenyl] thiophene-2-carboxamide, Nano-particles, Sensor, Fluorescent quenching.