title: Water-soluble polymeric chemosensor for selective detection of Hg(2+) in aqueous solution using rhodamine-based modified poly(acrylamide-acrylic acid).
abstract: We report the fabrication of a novel easily available turn-on fluorescent water-soluble polymeric chemosensor for Hg(2+) ions that was simply prepared by micellar free radical polymerization of a water-insoluble organic rhodamine-based Hg(2+)-recognizing monomer (GR6GH), with hydrophilic monomers acrylamide (AM) and acrylic acid (AA). The chemical structure of the polymeric sensor was characterized by FT-IR and (1)H NMR spectroscopy. The apparent viscosity average molecular weight Mη of poly(acrylamide-acrylic acid) [poly(AM-NaAA)] and the water-soluble polymeric chemosensor poly(AM-NaAA-GR6GH) were 1.76 × 10(6) and 6.84 × 10(4) g/mol, respectively. Because of its amphiphilic property, the water-soluble polymeric chemosensor can be used as a chemosensor in aqueous media. Upon addition of Hg(2+) ions to an aqueous solution of poly(AM-NaAA-GR6GH), fluorescence enhancements were observed instantly. Moreover, other metal ions did not induce obvious changes to the fluorescence spectra. This approach may provide an easily measurable and inherently sensitive method for Hg(2+) ion detection in environmental and biological applications.
authors: Anhui Key Laboratory of Functional Coordination Compounds, School of Chemistry and Chemical Engineering, Anqing Normal University, Anqing, 246011, People's Republic of China.|Collaborative Innovation Center for Petrochemical New Materials, Anqing, Anhui, 246011, People's Republic of China.
authors: Tong-Mou
authors: TM
authors: Geng
authors: Anhui Key Laboratory of Functional Coordination Compounds, School of Chemistry and Chemical Engineering, Anqing Normal University, Anqing, 246011, People's Republic of China.|Institute of Petrochemical Technology, Changzhou University, Changzhou, 213164, People's Republic of China.
authors: Da-Yu
authors: DY
authors: Wu
mesh_terms: D020106:Acrylamide / Q000737:chemistry; D000179:Acrylates / Q000737:chemistry; D005453:Fluorescence; D008163:Luminescent Measurements / Q000295:instrumentation / Q000379:methods*; D008628:Mercury / Q000032:analysis*; D011108:Polymers / Q000737:chemistry*; D012235:Rhodamines / Q000737:chemistry; D014874:Water Pollutants, Chemical / Q000032:analysis*
chemical_list: D000179:Acrylates; D011108:Polymers; D012235:Rhodamines; D014874:Water Pollutants, Chemical; D020106:Acrylamide; D008628:Mercury; C036658:acrylic acid
keywords: fluorescent chemosensor; mercury ion; polymeric chemosensor; rhodamine 6G; water soluble polymer