1. Faculty of Engineering of Guaratinguetá, São Paulo State University (UNESP), 12516-410, Guaratinguetá, SP, Brazil
2. Department of Analytical and Physical Chemistry, University Jaume I (UJI), Castelló 12071, Spain
3. CDMF, LIEC, Federal University of São Carlos (UFSCar), P.O. Box 676, São Carlos 13565-590, Brazil
4. São Carlos Institute of Chemistry, São Paulo University (USP), P.O. Box 676, São Carlos 13566-905, Brazil
5. Physics Department, Federal University of São Carlos (UFSCar), P.O. Box 676, São Carlos 13565-905, Brazil