作者单位:CESAM & Department of Chemistry, University of Aveiro, 3810-193 Aveiro, Portugal[1]CBQF/Escola Superior de Biotecnologia, Catholic University, Rua Dr. António Bernardino de Almeida, P-4200-072 Porto, Portugal[2]ISEIT/Viseu, Instituto Piaget, Estrada do Alto do Gaio, Galifonge, 3515-776 Lordosa, Viseu, Portugal[3]