1. CQC,
Department of Chemistry, University of Coimbra, 3004-535 Coimbra, Portugal
2. CQC,
Faculty of Pharmacy, University of Coimbra, 3004-295 Coimbra, Portugal
3. Unidad Académica de Física de la Universidad Autónoma de Zacatecas, 98068 Zacatecas, Mexico