No abstract

No abstract

No abstract

Various di-and mono-substituted quinazolinones were synthesized by one-pot condensation of isatoic anhydride, aldehyde and amine, or ammonium carbonate using [bmim]HSO 4 as catalyst in aqueous medium. Water as a reaction media, recyclability of catalyst, shorter reaction time, and good yields (70Á90%) are some of the salient features of the developed protocol.

In this work, we demonstrate the solution processing of optical and electrochemical dye sensors based on 4-(dioctylamino)-4 0 -(trifluoroacetyl)azobenzene and its application in sensing different amine compounds.Distinct optical response of the sensors exposed to ammonia, tetramethylammonium hydroxide, ethylamine, cadaverine and putrescine (typical compounds upon the decomposition of proteins) is observed. Incorporation of inkjet deposited thin films of the dye as sensors in food packages of ground meat and salmon is found as a feasible route to detect the appearance of biogenic amines produced by the degrading food products. Furthermore, we demonstrate an electrochemical amine sensor based on (trifluoroacetyl)azobenzene dye added in carbon nanotube-Nafion® composites. The electrochemical sensor exploits the reaction between the dye and amines to detect amines in electrolytes, while the carbon nanotubes provide large surface for adsorption and also provide a percolating electrical network for allowing efficient charge transfer at the electrode electrolyte interface. Scheme 1 Bonding reaction of 4-(dioctylamino)-4 0 -(trifluoroacetyl)azobenzene and amine. 4688 | J. Mater. Chem. A, 2015, 3, 4687-4694 This journal is

No abstract

No abstract

Nitrogen doping is a new strategy to improve catalysts for H2O2 direct synthesis.