Abstract
Four 1,1′-binaphthalene based bis-urea derivatives bearing aryl groups at end-on nitrogen atoms IIIa–d were synthesized as potential sensor molecules. These receptors show characteristic UV-VIS spectral changes on complexation with anions and they exhibit selective recognition of F− over other halide anions. Interaction of a fluoride anion with urea NH groups was confirmed by 1H NMR data. The presence of an electron-withdrawing nitro group in N′-aryls (receptors IIIa and IIIb) appeared to be necessary for naked-eye colorimetric detection. These receptors show dramatic color change from light-yellow to orange (IIIa) or to orange-red (IIIb) in the presence of guest fluoride anions already at concentrations of 10−5 mol dm−3 of the receptor and host.
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© 2009 Institute of Chemistry, Slovak Academy of Sciences
Artikel in diesem Heft
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Artikel in diesem Heft
- Utilization of solid phase spectrophotometry for the determination of trace amounts of copper using 5-(2-benzothiazolylazo)-8-hydroxyquinoline
- Analysis of spectinomycin in fermentation broth by reversed-phase chromatography
- An amperometric sensor for uric acid based on ordered mesoporous carbon-modified pyrolytic graphite electrode
- Utility of π-acceptor reagents for spectrophotometric determination of sulphonamide drugs via charge-transfer complex formation
- A graph theoretical approach to the effect of mutation on the flexibility of the DNA binding domain of p53 protein
- Aquaculture by-product: a source of proteolytic enzymes for detergent additives
- Effect of anthraquinone on brightness value and crystalline structure of pulp during soda processes
- Selection of a method for determination of activity of pectinolytic enzymes in berry fruit materials
- Study on polymeric micelles of poly(γ-benzyl l-glutamate)-graft-poly(ethylene glycol) copolymer and its mixtures with poly(γ-benzyl l-glutamate) homopolymer in ethanol
- Synthesis and characterization of mesoporous molecular sieves
- Growth mechanism and characterization of ZnO nano-tubes synthesized using the hydrothermal-etching method
- Novel use of silicon nanocrystals and nanodiamonds in biology
- Fluoride anion sensing using colorimetric reagents containing binaphthyl moiety and urea binding site
- Spectrophotometric methods for sertraline hydrochloride and/or clidinium bromide determination in bulk and pharmaceutical preparations
- Study of physicochemical properties-antitubercular activity relationship of naphthalene-1,4-dione analogs: A QSAR approach
- Spectroscopic study of protonation of oligonucleotides containing adenine and cytosine
- Rheological properties of doughs with buckwheat and quinoa additives
- Synthesis and isolation of methyl bismuth cysteine and its definitive identification by high resolution mass spectrometry