1. a Faculty of Arts and Sciences, Department of Chemistry , Dumlupınar University , Kütahya-, Turkey
2. b Faculty of Arts and Sciences, Department of Chemistry , Uludağ University , Bursa-, Turkey
3. c Faculty of Engineering, Department of Physics , Hacettepe University , 06800 Beytepe-Ankara, Turkey
4. d Faculty of Arts and Sciences, Department of Physics , Sakarya University , 54187 Esentepe-Adapazarı, Turkey