1. Institut de Chimie de Clermont-Ferrand, Université Clermont Auvergne, UMR 6296, BP 10448, F-63000 Clermont-Ferrand, France
2. Department of Chemistry, Hazara University, Mansehra 21300, Pakistan
3. Department of Chemistry, Islamia College Peshawar, Peshawar 25120, Pakistan
4. Institut de Physique et Chimie des Matériaux de Strasbourg, University of Strasbourg, CNRS UMR 7504, BP 43, 67034 Strasbourg cedex 2, France