The m-aminophenylarsonic acid (m-APAA) was immobilized onto the silica gel surface with covalently grafted quaternary ammonium groups via ion exchange. The diazotization of ion-bonded m-APAA resulted in a new solid-phase spectrophotometric reagent for detection of 1-naphtol in environmental water samples. The procedure of solid-phase spectrophotometric analysis is characterized by 20 μg L(-1) l...

BACKGROUND Phenylazonaphtol-β-D-O-glycosides are alternative substrates for the detection of enzymatic activity of β-glycosidases which are involved in various important processes. These azoic compounds are currently exploited as prodrugs for colonic disease due the presence of β-glycosidase activity in the gut flora and therefore allowing the release of the drug at the specific site. RESULTS...

The electroreduction mechanism of 1-Br-2-naphtol and 1-I-2-naphtol, two inherently chiral BINOL derivatives ([1,1′-Binaphthalene]-2,2′-diol, 6,6′-dibromo 1,1′-Binaphthalene,6,6′-dibromo-2,2′-dimethoxy; in the following named P1 P2, respectively), is characterized by means an integrated electrochemical theoretical approach. experimental characterization based on cyclic voltammetry measurements. ...