A simple and sensitive method for the determination of carbaryl in whole blood and commercial formulations, based on normal, and synchronous firstand second-derivative fluorescence spectra, is presented. Solvent effects on the spectral characteristics of carbaryl solutions and the influences of instrumental parameters are described in detail. Two methods have been developed, with neutral (for c...

Excited-state proton transfer from 5,8-dicyano-2-naphthol to methanol takes place in CO2/methanol mixtures, in the pressure and temperature ranges of supercritical CO2. The efficiency of the proton-transfer step decreases with the pressure. This is assigned to the perturbation of the methanol clusters solvating the naphthol.

An efficient one pot condensation of naphthols (1), 2,5-disubstituted indole-3-carboxaldehydes (2), and secondary amines (3) has been achieved using dichloromethane as a solvent, stirring at room temperature. Some of the new [(disubstituted amino)(5-substituted 2-phenyl-1H-indol-3-yl)methyl]naphthalene-ols (4) derivatives were prepared in good yields. The significant features of this method are...

Excited-state proton transfer in inclusion complexes of 1-aminopyrene and a-naphthol with cyclodextrins was studied by time-resolved spectroscopy. We find that the kinetic studies are much more sensitive to the complexation than are steady-state spectroscopic measurements. Our data suggest two distinct binding orientations for 1 -aminopyrene bound to 8-cyclodextrin. The rate of proton transfer ...

The 1Lb and 1La excited states of naphthols are characterized by using time-dependent density functional theory (TDDFT), configuration interaction with singles (CIS), and equation-of-motion coupled cluster singles and doubles (EOM-CCSD) methods. TDDFT fails dramatically at predicting the energy and ordering of the 1La and 1Lb excited states as observed experimentally, while EOM-CCSD accurately ...

AKAGUCHI'S test for arginine depends on the production of a pink or red colour when certain guanidine derivatives are treated with a-naphthol and sodium hypochlorite in alkaline solution (Sakaguchi, 1925). This test had been familiar to biochemists for 19 years before it was independently adapted to histochemical use in the same year by Serra (1944) and myself (1944). Our results were published...

No fluorescence emission of the naphtholate anion is observed from ionic liquids with an imidazolium cation containing a C2 hydrogen (C2-H). This is attributed to the formation of a "dark" complex between the imidazolium cation and the excited naphtholate anion.