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Given the strong hydration propensity of fluoride ions, it is difficult to detect fluoride, especially inorganic fluoride, in aqueous samples. Resolving the issue of fluoride detection in aqueous samples is a scientific undertaking of great practical significance. Herein, we propose a new method for the sensitive and selective detection of fluoride in aqueous samples without the addition of organic...
A polymer-based adsorption medium with molecular recognition ability for homologs of pyrethroids was prepared by atom transfer radical polymer iration using a fragment imprinting technique. Phenyl ether-biphenyl eutectic was utilized as a pseudo-template molecule, and the adsorption medium prepared was evaluated by solid-phase extraction and gas chromatography. Selectivity of the medium for pyrethroids...
In this work, we designed and synthesized a carbazole-type molecule that can form carbazolyl radicals in chloroform solution under the irradiation of UV light. The process is accompanied by an obvious change in the emission color from blue to bright green. The radicals and the neutral molecules assemble together and form nanospheres through synergistic effect of π-π stacking, intermolecular hydrogen...
A novel electro-active conjugated copolymer (PFPCz) has been designed, synthesized and used as the precursor of electropolymerization (EP) directly. By optimizing the EP condition, the PFPCz EP films have been prepared and displayed high fluorescent sensitivity to TNT, whose fluorescent intensity could be quenched 68.6% exposed to TNT (50μM) in aqueous medium. These results suggest PFPCz EP film a...
A simple fluorene oligomer 7, 7′-bis(9, 9-bis(6-(9H-carbazol-9-yl)hexyl)-9H-fluoren-2-yl)-9,9,9′,9′-tetrakis(6-(9H-carbazol-9-yl)hexyl)-9H, 9′H-2, 2′-bifluorene (OCZ) with peripheral carbazole side chains is synthesized and used to detect iodide (I − ) as colorimetric/fluorometric probe. It shows high fluorescence quenching sensitivity and selectivity towards I − . When OCZ acted as...
A novel non-enzymatic hydrogen peroxide sensor was realized from Mn-nitrilotriacetate acid (Mn-NTA) nanowires, which were successfully fabricated via a facile hydrothermal route. Cyclic voltammetry (CV) revealed that the Mn-NTA nanowires exhibited direct electrocatalytic activity for the oxidation of H 2 O 2 in phosphate buffer solution. The sensor showed linear response to H 2...
NiO hollow nanospheres were synthesized by controlled precipitation of metal ions with urea using carbon microspheres as templates, which were for the first time adopted to construct a novel amperometric glucose biosensor. Glucose oxidase was immobilized on the surface of hollow nanospheres through chitosan-assisted cross-linking technique. Due to the high specific active sites and high electrocatalytic...
Colloidal carbon microspheres (CMS) are dispersed in chitosan (CHIT) solution to form an organic–inorganic hybrid with excellent micro-environment for the immobilization of biomolecules. A novel amperometric biosensor for the determination of hydrogen peroxide (H 2 O 2 ) has been constructed by entrapping horseradish peroxidase (HRP) in as-synthesized CMS/CHIT hybrid. The modification...
A new simple, selective and sensitive method for the determination of trace chlorine dioxide in water has been developed, based on the oxidation by chlorine dioxide to reduction the fluorescence of rhodamine dyes in ammonia–ammonium chloride buffer solution. Four rhodamine dyes systems such as rhodamine S, rhodamine G, rhodamine B and butyl-rhodamine B were tested. The rhodamine S system is the best,...
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