Naked-eye-based highly selective sensing of Fe3+ and further for PPi with nano copolymer film
writer：Li, Z. X.; Li, H. X.; Shi, C. X.; Zhang, W. Y.; Zhou, W.; Wei, L. H.; Yu, M. M.
keywords：PPi, Fe3+
source：期刊
specific source：Sens. Actuators B, 2016, 226, 127–134
Issue time：2016年
Novel rhodamine and quinoline-functionalized nano film was prepared by copolymerization and electrospinning. Propenyl monomer of rhodamine and quinoline was synthesized and then copolymerized with methyl methacrylate via solution polymerization. This prepared copolymer was electrospun into nano film, as a solid-state sensor, which exhibits highly selective recognition of Fe3+ ions over various environmentally and biologically relevant metal ions and anions with a distinct color change from colorless to pink in very fast response time (<1 min). The sensor can detect Fe3+ quantitatively in concentration range of 100-2000 mu M, and the calculated low detection limit (LOD) value could be 1.19 mu M for Fe3+. As the resultant product, the Fe3+-contaminated nano film showed recovered color change by extra addition of pyrophosphate P2O74- (PPi) solution. It was found that the absorption intensity at 564 nm of the Fe3+-contaminated nano film linearly decreases with PPi concentration from 50 to 3000 mu M with LOD value of 1.75 mu M. In addition, both the nano films before and after Fe3+-contaminating are reusable for the detection of Fe3+ and PPi, respectively.