A reusable nanofibrous film chemosensor for highly selective and sensitive optical signaling of Cu2+ in aqueous media

Abstract

A novel surface modification strategy for an electrospun nanofibrous film was reported, allowing detection and removal of copper ions in the aqueous solution. This reusable dual fluorescent-colorimetric nanofibrous film can be utilized conveniently to achieve real-time naked-eye sensing in aqueous medium just like using a test paper.

A new Rhodamine B-based ‘on–off’ chemical sensor with high selectivity and sensitivity toward Fe3+ and its imaging in living cells

“…[26][27][28][29][30][31] Moreover, it is well known that rhodamine derivatives with a spirolactam structure are non-fluorescent; however, when rhodamine derivatives bind to metal ions or protons, ring-opened amides give rise to strong fluorescence emission. [32][33][34][35] On the basis of this interpretation, researchers have synthesized a series of rhodamine derivatives that can be used as fluorescence turn-on chemosensors for the detection metal ions, such as Hg 2+ , Cu 2+ , Sn 2+ , Cr 3+ , Sn 4+ and Pb 2+ . [36][37][38][39][40]26,41,42 Although, many rhodamine based sensors for Fe 3+ have been reported, 43,44 only few of them have been applied in biological systems for the detection of Fe 3+ .…”

A Novel Nanofibrous Film Chemosensor for Highly Selective and Sensitive Optical Signaling of Zn2+

“…Synthesis of 2-hydroxy-4-acryloyloxy-benzaldehyde (HAB) 20 2,4-Dihydroxybenzaldehyde (1.40 g, 10 mmol), hydroquinone (0.50 g, 4.5 mmol) and triethylamine (1.65 mL, 12 mmol) were dissolved in 200 mL 2-butanone. Then acryloyl chloride (12 mmol) in 30 mL 2-butanone was added dropwise into the mixture with constant stirring at −5 °C, then increased the reaction temperature gradually to …”

“…21 This unique porous structure could greatly accelerate the targets to diffuse close to the sensing elements and increase the complexation efficiency. 22 Response of poly (MMA-co-Sal) nanofibrous film to Zn 2+ ions…”

Effect of DksA Protein on the Susceptibility of Escherichia coli Towards Novel Amine N-Halamine Polymeric Nanoparticles as Powerful Antibiotics

“…The spectrum shows strong C-H characteristic peak at around 2930 and 2980 cmG 1 which are an effective evidence for -CH 2 -group reflecting the formation of the polymeric carbon framework (Sun et al, 2010). A strong band at about 1735 cmG 1 as a structural label for C = O group is ascribed to the ester group of the MMA structural component in polymers (Wang et al, 2013a). Additionally, the C-N and N-Cl characteristic peak appeared at around 1230 and 750 cmG 1 , respectively .…”