heterocyclic derivative contain triazole ring was synthesized and characterized the product their structures by infrared spectroscopy, 1H-NMR, 13C-NMR instrumental techniques. Compound (4) reacting of Schiff base (3) with an three moles alkyl halide (p-phenyl phenacyl bromide). Final played important role in photostabilizer polymer (PS), showed activity as a when exposed to UV light (300 hours).

A detailed understanding of the stability an active pharmaceutical ingredient and a dosage form is essential for drug-development process safe effective use medicines. Photostability testing as inherent part studies provides valuable knowledge on degradation pathways structures products generated under UV irradiation. particularly important topically administered drugs, they are more exposed to...

The paper presents regularities that demonstrate the effect of passivating ligands formation thioglycolic acid and L-cysteine (TGA, L-Cys) dielectric shells (SiO 2 ) on Ag S nanocrystals interface photostability their IR luminescence. Using FTIR absorption spectroscopy, interaction manifestations molecules TGA L-Cys with nanocrystals, as well SiO shell due to process replacing organic a silica ...

In this paper, we present a laser-induced photoacoustic study on the photostability of laser dye Coumarin 540 doped in PMMA matrix and modified by the incorporation of low-molecular weight additives. The dependence of photostability of the dye on various experimental conditions, such as nature of solvents, incident optical power and dye concentration, is investigated in detail. The activation r...

The characteristics of host-guest complexation between cyclodextrins (beta-CD, DM-beta-CD, HP-beta-CD) and protonated (pH 1.9, 6.2) or basic (pH 10.2) forms of trifluoperazine (TF) were investigated by spectrometric method. The association constants of complexes obtained at different temperatures and pH were calculated using Scott's equation and the thermodynamic parameters (deltaH, deltaS and ...