Fluorescent Polyamide-Based Rhodamine Hydrazide Moieties with Oxethyl as Spacer for Detection of Cr(3+), Fe(3+), and Hg(2+) Ions in Water.

摘要: An acrylic monomer bearing xanthene group, N-oxethyl acrylate-N'-rhodamine B hydrazide (ARBHE) was synthesized from N-hydroxyl ethyl-N'-rhodamine (RBHE) and acryloyl chloride (Ac) in the presence of triethylamine dry dichloromethane (CH2Cl2) at room temperature. The ARBHE identified by FTIR, (1)H NMR spectra elementary analysis. Copolymer poly(AM-ARBHE) AM with thermal initiator free radical precipitation polymerization it characterized method FTIR NMR. Its molecular weights (Mη) 7.03 × 10(3) g mol(-1) content rhodamine units polymer chains 1.44 % mole fraction. ability to detect different metal cations (Ag(+), Ba(2+), Cd(2+) Co(2+), Cr(3+), Cu(2+), Co(2+) K(+), La(3+), Mg(2+), Na(+), Ni(2+), Pb(2+), Fe(2+), Fe(3+), Hg(2+) Zn(2+)) water investigated. Upon addition Fe(3+) or ions aqueous solution, visual color change fluorescence enhancement were observed. Moreover, other did not induce obvious changes except Fe(2+). detection limit less than 1 × 10(-11) M. results suggest that this copolymer may offer potential as a polymeric sensor for water.