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The chemiluminescence (CL) arising from reaction of bis(2,4,6-trichlorophenyl)oxalate(TCPO) with hydrogen peroxide in the presence of a diethyl-2-(cyclohexylamino)-5-[(E)-2-phenyl-1-ethenyl]-3,4 furandicarboxylate as a novel fluorescer (Flu) has been studied. The relationship between the chemiluminescence intensity and concentrations of TCPO, sodium salicylate, hydrogen peroxide and fluorescer is reported. The chemiluminescence parameters including intensity at maximum CL, time at maximum intensity, total light yield, theoretical maximum level of intensity and pseudo-first order rate constants for the rise and fall of the CL burst (kr and kf) were evaluated from computer fitting of the resulting intensity-time plots. The activation parameters Ea, ΔH‡, ΔS‡ and ΔG‡ for the rise and fall steps were evaluated from thetemperature dependence of kr and kf values. [ABSTRACT FROM AUTHOR]

Viscosities, refractive indices, and densities for aqueous solution of L-cysteine hydrochloride monohydrate ([LCHCMH]) and D-sorbitol, also densities (ρ), refractive indices (nD), excess molar volumes (VE), and change of refractive indices on mixing (ΔnD) for aqueous solution of glycerol have been measured at several mole fractions and temperatures (between T 303.15 K and T 323.15 K) at atmospheric pressure. The measurements were carried out using a vibrating-tube density meter for density, an Abbe refractometer for refractive index and an Ubbelohde viscometer for viscosity. From these data for aqueous solution of glycerol, the excess molar volumes and the change of refractive indices on mixing were calculated and fitted to the Redlich-Kister polynomial equation. Also for aqueous solutions of [LCHCMH], glycerol, and D-sorbitol, the density and refractive indices were fitted with the experimental equations to estimate the adjustable parameters and relative deviations. It has been observed for aqueous solution of glycerol that the excess molar volumes and change of refractive indices on mixing increase and decrease with increasing temperature, respectively. [ABSTRACT FROM AUTHOR]