کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
175778 458920 2015 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Polydiacetylene-based sensor for highly sensitive and selective Pb2+ detection
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Polydiacetylene-based sensor for highly sensitive and selective Pb2+ detection
چکیده انگلیسی


• A new PDA-based sensing system was provided for detection of Pb2+.
• A detection method by employing microscopy and microwell was developed.
• The sensing system can detect Pb2+ with 1 μM detection limit using microscopy.

Polydiacetylenes (PDAs), as smart materials with very unique properties, are widely used for sensing various analytes. Derived from the monomers 1-(1,4,7,10,13-pentaoxa-16-aza-cyclooctadec-16-yl)-pentacosa-10,12-diynamide (PCDA-L) and 10,12-pentacosadiynoic acid (PCDA), we report a conjugated polymer (poly-PDA-L) for lead ions detection. The PDA sensing system showed rapid fluorescent and colorimetric response and high sensitivity to Pb2+ in 100% aqueous solution, as well as the color change was obvious to the naked eye. Excellent fluorescence response change and a good linear relationship between fluorescent PDA intensity and Pb2+ amount were observed based on fluorescence microscope images, with a detection limit of 1 μM. The fluorescent and colorimetric responses were attributed to the binding between the moiety 1-aza-18-crown-6-ether of poly-PDA-L and Pb2+. This interaction further disturbs the backbone of the PDA polymer, allowing the release of the strain energy imposed on the alkyl side chains generated during polymerization, leading to the observed change in optical properties.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Dyes and Pigments - Volume 120, September 2015, Pages 307–313
نویسندگان
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