一种使用简单修饰的聚丙烯腈纤维对 Ag(+)进行高选择性比色检测的传感器。
An overwhelmingly selective colorimetric sensor for Ag(+) using a simple modified polyacrylonitrile fiber.
机构信息
Department of Chemistry, School of Science, Tianjin University, Tianjin 300072, China; Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300072, China.
Department of Chemistry, School of Science, Tianjin University, Tianjin 300072, China; Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300072, China.
出版信息
J Hazard Mater. 2015 Oct 30;297:207-16. doi: 10.1016/j.jhazmat.2015.05.001. Epub 2015 May 2.
A carboxymethyl-dithiocarbamate immobilized polyacrylonitrile fiber colorimetric sensor has been synthesized. This fiber sensor exhibits excellent selectivity and sensitivity for Ag(+) in aqueous solution with a remarkable color change from light pink to red-brown over a wide pH range of 2-12. The sensor responds selectively to Ag(+) in the presence of other ions, including Mg(2+), Al(3+), Ca(2+), Cr(3+), Mn(2+), Co(2+), Ni(2+), Cu(2+), Zn(2+), Cd(2+), Hg(2+) and Pb(2+). The colorimetric sensor has an extremely fast response time (10s) and a low visual limit of detection (5.53×10(-12) mol/L). The fiber sensor also undergoes an obvious color change in the presence of Ag(+) solutions containing EDTA, NaCl or NaBr. Density functional theory optimization reveals that the sensor and Ag(+) interact via a seven-membered ring complexation mechanism.
一种羧甲基二硫代氨基甲酸盐固载的聚丙烯腈纤维比色传感器已经被合成。该纤维传感器在宽 pH 值范围（2-12）内对水溶液中的 Ag(+) 表现出优异的选择性和灵敏度，其颜色从浅粉色到红棕色发生显著变化。该传感器在存在其他离子（包括 Mg(2+)、Al(3+)、Ca(2+)、Cr(3+)、Mn(2+)、Co(2+)、Ni(2+)、Cu(2+)、Zn(2+)、Cd(2+)、Hg(2+)和 Pb(2+)）时选择性地响应 Ag(+)。比色传感器具有极快的响应时间（10s）和低的可见检测限（5.53×10(-12)mol/L）。该纤维传感器在含有 EDTA、NaCl 或 NaBr 的 Ag(+)溶液中也会发生明显的颜色变化。密度泛函理论优化表明，传感器与 Ag(+) 通过七元环络合机制相互作用。
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