Preparation and assay performance of supramolecule of cyclophane-complexed polyoxometalates supported on the gold surface

Carbazole-based bis-imidazole ligand-involved synthesis of inorganic–organic hybrid polyoxometalates as electrochemical sensors for detecting bromate and efficient catalysts for selective oxidation of thioether

“…Three pairs of redox peaks (I–I′, II–II′, III–III′) of 1–3 -CPEs should belong to three consecutive two-electron redox processes of Mo centers, and the electrochemical reaction can be shown as follows. 41,42 POM − complex + 2H + + 2e − → H 2 POM − complexH 2 POM − complex + 2H + + 2e − → H 4 POM − complexH 4 POM − complex + 2H + + 2e − → H 6 POM − complex…”

An amperometric sensor of iodate based on the composite film of a crown heteropolyanions and Cu@Ag nanoparticles

“…According to the impedance spectra of the [PEI/PSS-Cu@AgNPs/PEI/P 8 W 48 ] 5 multilayer film, the estimated R 1 for the W 5+ /W 6+ redox couple are 35203 (n = 5) and 10438 (n = 5) X, respectively. The electric charge transmission speed constant (k 0 ) of W 5+ /W 6+ at the [PEI/PSS-Cu@AgNPs/ PEI/P 8 W 48 ] 5 multilayer film interface can be estimated according to the equation: k 0 = RT/R 1 n 2 F 2 AC [58,59], where R 1 is the resistance to charge transfer, n is the number of electrons transferred per electroactive species, C is the constant phase element (CPE), A is the geometric area of the electrode (square centimeters), and all other terms have their usual meaning. According to the equation, the electric charge transmission speed constant (k 0 ) of the multilayer film was estimated to be 2.41 Â 10 À4 cm s À1 .…”

Rhenium-Based Molecular Trap as an Evanescent Wave Infrared Chemical Sensing Medium for the Selective Determination of Amines in Air

“…The host–guest behavior of these types of supramolecules provides a means to selectively interact with targeted analytes. Due to the custom design properties of the molecular trap, supramolecules have been widely utilized in the fabrication of sensors, − probes, photonic devices, catalysts, − and in studies of basic host–guest chemistry. − In this work, we report on the synthesis of a supramolecule that is specifically designed to interact with amines containing heterocyclic or phenyl rings, which is an important class of volatile organic compounds (VOCs) that are found in our environment. , Although a number of analytical methods have been developed to determine the concentration of amines in different media, − weaknesses are usually associated. For instance, chromatographic methods offer the ability to simultaneously analyze interested amines, but the sample treatment and separation are tedious and time-consuming. , Optical , and mass-sensitive sensors , have also been proposed for analysis of amines.…”