Using a Modified Polyamidoamine Fluorescent Dendrimer for Capturing Environment Polluting Metal Ions Zn2+, Cd2+, and Hg2+: Synthesis and Characterizations

One of the most pressing global concerns is how to provide a clean environment for future generations given exacerbation urban, agricultural, industrial, and economic activities due escalating size population. A polyamidoamine (PAMAM) dendrimer peripherally modified with 4-N,N?-dimethylethylenediamine-1,8-naphthalmide as chromophore was synthesized utilized capture hazardous heavy metal ions. This fluorescent (FCD) complexed Group 12 ions (Zn2+, Cd2+, Hg2+) at 2:1 (metal: FCD) ratio. Electronic absorption, fluorescence emission, Infra-red (IR), nuclear magnetic resonance (1H NMR) spectroscopies, conductivity, CHN elemental, thermogravimetry, scanning electron microscopy (SEM), transmission (TEM) analyses were used characterize resulting complexes. These assays revealed that complexes yellow-colored, thermally stable, nanoscale-sized, composed [M2FCD]·4Cl2. Considerable spectral shifts observed in emission absorption spectra FCD molecule after binding Zn2+ ions, which can be differentiate complex from other two work provides basic data facilitate detection, quantification, removal environmentally through complexation dendrimer.