1. Molecular Biophysics; University of Kaiserslautern; Erwin-Schrödinger-Str. 13 67663 Kaiserslautern Germany
2. Department of Chemistry; University of Ibadan; 200284 Ibadan Nigeria
3. Institute of Chemistry and Institute of Biochemistry and Biotechnology; Martin Luther University Halle-Wittenberg; Von-Danckelmann-Platz 4 06120 Halle Germany