Spectroscopic properties of pharmacologically active phenols

Abstract

The IR Fourier transform spectra of pharmacologically active phenol molecules in solutions in CCl 4 and in the crystalline state have been studied. Phenol derivatives with different directivities and different levels of pharmacological efficiency have been examined. Based on analysis of the IR spectra of screened phe nols, the antimicrobial activity of phenols with free hydroxyl groups has been shown to be highest. The high antimicrobial activity of aminophenols is related to the formation of intramolecular hydrogen bonds. For aminophenols that are active against herpesviruses, O-H⋅⋅⋅N hydrogen bonds are formed in molecules. The main characteristic of the high antiviral activity against A type influenza is predominance of intramolecular hydrogen bonds of the O-H⋅⋅⋅O=C type in molecules. Sulfur containing aminophenols, which manifest activity against HIV infection, are characterized by the occurrence of hydrogen bonds that involve the partic ipation of the OH, NH, and SO 2 groups.

Vibronic and cation spectroscopy of selected rotamers of 4-chloro-3-fluorophenol

“…Investigations on the molecular structure can help us have insights into site specific intermolecular interactions in biological processes [1][2][3][4][5]. For this purpose, phenol and its halo-substituted species have been studied extensively by various spectroscopic methods [6][7][8][9][10][11][12][13][14].…”