Cadmium(II) (8-Hydroxyquinoline) Chloride Nanowires: Synthesis, Characterization and Glucose-Sensing Application

Luminescent cadmium(II) (8-hydroxyquinoline) chloride (CdqCl) complex nanowires are synthesized via a sonochemical solution route. The results of X-ray photoelectron spectroscopy, energy dispersive X-ray analysis, infrared spectroscopy, elemental analysis (EA), and atomic absorption spectroscopy demonstrate that the chemical composition of the product is Cd(C9H6NO)Cl. Transmission electron microscopy and scanning electron microscopy images show that the CdqCl product is wire-like in structure, with a diameter of approximately 50 nm and an approximate length of 2-4 mu m. The morphology and composition of the product call be transformed from Cdq(2) micrometer-scaled flakes to CdqCl nanowires by increasing the ratio of CdCl2/q. A new fluorescent sensing strategy for detecting H2O2 and glucose is developed and is based oil the combination of the luminescent nanowires and the biocatalytic growth of Au nanoparticles. The quenching effects of Au nanoparticles and AuCl4- on the fluorescence of CdqCl nanowires are investigated. The dominant factor for the fluorescence quenching of CdqCl nanowires is that the Stern-Volmer quenching constant of Au nanoparticles is larger than that of AuCl4-.