SYNTHESIS, THERMAL AND SPECTROSCOPIC STUDIES OF LITHIUM SALT OF NAPROXEN.

A new lithium salt was synthesized and characterized. The stoichiometry of the salt was LiNap . 1H 2 O. The salt was thermally stable until 260 °C and 275 °C in air and nitrogen atmospheres, respectively, and don’t melt until the decomposition. The salt was highly crystalline and the crystal has a prismatic form. A spectroscopic study of the compound was done covering the UV, Vis, NIR and MIR regions. The fluorescence studies shown that the salt emits in 356 nm when excited on 236 or 264 nm. This emission was assigned to the first singlet excited state to the singlet ground level state of the compound.