RGB-Switchable Porous Electrospun Nanofiber Chemoprobe-Filter Prepared from Multifunctional Copolymers for Versatile Sensing of pH and Heavy Metals

• DOI: 10.1021/acsami.7b00970
• Publication Date: 2017-04-25T20:19:42Z
• Authors: Fang-Cheng Liang; Chi-Ching Kuo; Bo-Yu Chen; Chia-Jung Cho; Chih-Chien Hung; Wen-Chang Chen; Redouane Borsali
• Keywords: Electrospinning; Rhodamine

Novel red-green-blue (RGB) switchable probes based on fluorescent porous electrospun (ES) nanofibers exhibiting high sensitivity to pH and mercury ions (Hg2+) were prepared with one type of copolymer (poly(methyl methacrylatete-co-1,8-naphthalimide derivatives-co-rhodamine derivative); poly(MMA-co-BNPTU-co-RhBAM)) by using a single-capillary spinneret. The MMA, BNPTU, RhBAM moieties designed (i) permit formation fibers, (ii) fluoresce for Hg2+ detection, (iii) pH, respectively. fluorescence emission BNPTU (fluorescence resonance energy transfer (FRET) donor) changed from green blue as it detected Hg2+. (FRET acceptor) was highly selective changing nonfluorescent (pH 7) strong red 2). full-color the ES included green, red, blue, purple, white depending particular Hg2+-concentration combination solution. 30 nm pores fabricated hydrophobic low-boiling-point solvent, at relative humidity (80%). These had higher surface-to-volume ratio than did corresponding thin films, which enhanced their performance. present study demonstrated that FRET-based full-color-fluorescence nanofibrous membranes, exhibit on-off switching can be used naked eye probes, have potential application in water purification sensing filters.