Akademik Veri Yönetim Sistemi
The 12th Chemical Physics Congress, Karabük, Türkiye, 12 - 13 Ekim 2018, ss.22
Sulfonamide antibiotics are used as medicine for the
treatment of bacterial diseases [1]. These compounds have been used in high
volumes for several decades because of their effectiveness and inexpensiveness [2]
Distribution of these compounds in the environment is a serious problem because
of their potential toxicity towards to aquatic life and human health [3].
Therefore an effective elimination of them in aqueous medium is essential to
protect human health. The aim of this study is to determine probable reaction
path of sulfonamides degradation reactions. For this purpose sulfisoxazole was
chosen as a model compound.
In this work, the reaction of sulfisoxazole with hydroxyl
radical have been investigated theoretically. Geometry optimizations of the
reactants, the product radicals and the transition state complexes were
performed with the DFT method within the GAUSSIAN 09 package. The DFT
calculations were carried out using the hybrid B3LYP functional, which combines
HF and Becke exchange terms with the Lee-Yang-Parr correlation functional with
6-31+g (d,p) basis set. Solvent effect was computed by using CPCM as the
solvation model. The solvent was water at 25 0C, with the dielectric
constant 78.39.