1. Department of Chemical and Pharmaceutical Sciences; University of Trieste; via L. Giorgieri 1 Trieste I-34127 Italy
2. Chemistry Department; University of Coimbra; Coimbra 3004-535 Portugal
3. Department of Chemical and Pharmaceutical Sciences; University of Trieste; P.le Europa, 1 Trieste I-34127 Italy
4. Department of Engineering and Architecture; University of Trieste; Trieste I-34127 Italy
5. Department of Life Sciences; University Hospital of Cattinara; Trieste 34100 Italy