Molecularly imprinted membrane-zinc porphyrin-mathacrylate（MIM-Zn-MAA）, a dual read-out sensor based on a molecularly imprinted membrane, was developed to recognize and detect dimethyl methylphosphonate （DMMP） as ...Molecularly imprinted membrane-zinc porphyrin-mathacrylate（MIM-Zn-MAA）, a dual read-out sensor based on a molecularly imprinted membrane, was developed to recognize and detect dimethyl methylphosphonate （DMMP） as an intermediate molecule of organophosphorus pesticides. The membranes were prepared via thermal polymerization of two functional monomers（zinc porphyrin and mathacrylate） on the surface of a glass slide functio- nalized with ethylene glycol dimethacrylate and azobisisobutyronitrile. The morphology of the as-synthesized MIM-Zn-MAA was determined with scanning electronic microscopy. The composite membranes exhibited macrovoid morphologies, which were affected by the functional monomers. These membranes were selectively adsorbed onto the template molecule and displayed higher adsorbing capacity toward DMMP compared with their structural analogs Changes in the fluorescent spectra were qualitatively and quantitatively monitored via fluorescence photometry. Dif- ference maps were also obtained using colorimetry before and after the reaction between MIM-Zn-MAA and DMMP at various concentrations. The maps showed a wide linear range varying from 0.1 lamol/L to 10 mmol/L with a low detection limit of 0.1 lamol/L. These preliminary results demonstrate that the as-fabricated dual read-out sensor dis- plays good sensitivity and selectivity toward DMMP, indicating its considerable potential in DMMP detection in practical applications.展开更多
基金Supported by the National Natural Science Foundation of China（No.31101284）, the Natural Science Foundation of Chongqing City, China（No.CSTC-2011BB1209）, the Fundamental Research Funds for the Central Universities of China （Nos.CQDXWL-2012-034, CQDXWL-2012-035, CDJPY1222 0001） and the Student Research Training Program in Chongqing University, China（Nos.CQU-SRTP-2015497, CQU-SRTP-2015502）.
文摘Molecularly imprinted membrane-zinc porphyrin-mathacrylate（MIM-Zn-MAA）, a dual read-out sensor based on a molecularly imprinted membrane, was developed to recognize and detect dimethyl methylphosphonate （DMMP） as an intermediate molecule of organophosphorus pesticides. The membranes were prepared via thermal polymerization of two functional monomers（zinc porphyrin and mathacrylate） on the surface of a glass slide functio- nalized with ethylene glycol dimethacrylate and azobisisobutyronitrile. The morphology of the as-synthesized MIM-Zn-MAA was determined with scanning electronic microscopy. The composite membranes exhibited macrovoid morphologies, which were affected by the functional monomers. These membranes were selectively adsorbed onto the template molecule and displayed higher adsorbing capacity toward DMMP compared with their structural analogs Changes in the fluorescent spectra were qualitatively and quantitatively monitored via fluorescence photometry. Dif- ference maps were also obtained using colorimetry before and after the reaction between MIM-Zn-MAA and DMMP at various concentrations. The maps showed a wide linear range varying from 0.1 lamol/L to 10 mmol/L with a low detection limit of 0.1 lamol/L. These preliminary results demonstrate that the as-fabricated dual read-out sensor dis- plays good sensitivity and selectivity toward DMMP, indicating its considerable potential in DMMP detection in practical applications.
