1. Department of Physical Chemistry; University of Málaga; Campus de Teatinos s/n; Málaga; 29071; Spain
2. Centro de Geología; Departamento de Geociencias; Ambiente e Ordenamento do Território do Porto; Faculty of Science; University of Porto; Rua do Campo Alegre 687; 4169-007; Porto; Portugal
3. Institute of Physics; University of Brasilia 04455; DF; 70919-970; Brazil
4. Department of Chemistry; Graduate School of Science; Nagoya University; Chikusa, Nagoya; Japan
5. Department of Chemistry; University of Coimbra; P3004-535; Coimbra; Portugal
6. Dpto. Física Aplicada and Instituto Universitario de Materiales de Alicante; Alicante; 03080; Spain
7. Dpto. Óptica and Instituto Universitario de Materiales de Alicante; Alicante; 03080; Spain