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Vol 8, No 4 (2018)
- Year: 2018
- Articles: 2
- URL: https://journal-vniispk.ru/2634-8276/issue/view/13574
Article
Gas Chemical Nanosensors with Sensing Elements Based on Metal Oxides
Abstract
This review presents the results of the development of gas chemical nanosensors with sensitive elements based on gallium, cadmium, cerium, cobalt, vanadium, silicon, manganese, niobium, zirconium, aluminum, bismuth, lanthanum, magnesium, palladium, antimony, sodium, samarium, platinum, barium, lithium, and potassium. The developed devices are systematized in accordance with the features of construction of their sensing elements. The analytical capabilities of these devices are considered, and the observable regularities are noted. In particular, the potential of these nanosensors for use in the identification of a large number of inorganic and organic chemical compounds is demonstrated. The effect of the morphology and composition of the coating and temperature of the sensing element on the sensitivity and selectivity of measurements and the response and recovery times is shown.
301-372
Methods for the preparation of 1-Aminocyclopropanecarboxylic Acids
Abstract
The derivatives of 1-aminocyclopropanecarboxylic acid (ACC) over recent decades have attracted close attention from synthetic chemists owing to their high physiological activity as plant growth regulators, conformationally rigid analogs of natural amino acids, and peptidomimetics. The present review considers contemporary approaches to the methods of preparation of amino acids of the ACC series, namely, the alkylation of glycine equivalents with 1,2-electrophiles, the intramolecular cyclization of γ-substituted amino acid derivatives, alkene cyclopropanation under the action of diazo compounds, ylides, and carbene intermediates, as well as other synthetic approaches.
373-401