A comparison for application time of electrical discharge onto 3-acetamidocoumarin molecule

Abstract

A topic of great interest is discussed as the atmospheric-pressure non-equilibrium plasma jets and their applications. In this study, our plasma generated here can be described as the dielectric barrier discharge-like. It is known that these types of plasma can be used in various applications like surface modification, inactivation of microorganism etc. An interesting application of the atmospheric pressure plasma is decomposing of the long chemical chain molecules. We present a new decomposing method for the molecules. Investigation of molecular structure of coumarin is very important. We perform the structural analysis of molecules that interact with atmospheric pressure plasma jet. The 3-acetamidocoumarin molecule plays an important role in biology and medicine. It has physiological effects and it has been used to product of drug for many diseases such as treatment of burns, brucellosis-rheumatic diseases and cancer. The atmospheric-pressure non-equilibrium plasma jet of argon (Ar) has been formed by ac-power generator with frequency - 24 kHz and voltage-12 kV. FT-IR spectra of the molecule "3-acetamidocoumarin" (abbreviated as 3ADC) dissolved in ethanol and methanol have been analysed after applying (application times, 1 minute and 3 minutes) the plasma, for the first time. Also the changes of structure have been evaluated. 4C-O band is broken and the main photoreactions were observed the characteristic IR intense band due to the antisymmetric stretching vibration of the ketene (-3C=4C=O) group. New photoproduct is obtained in the E arrangement of the (O=) 5C-10C=11C-3C (=4C=O) fragment