1. University of Valencia, Faculty of Pharmacy, Department of Inorganic Chemistry, Vincent Andres Estelles s/n, Burjassot (Valencia) E-46100, Spain
2. University of Bucharest, Department of Chemistry, Bd. Carol I (Republicii) 13, Bucharest R-70346, Romania
3. University of Florence, Laboratory of Inorganic and Bioinorganic Chemistry, Via Gino Capponi 7, Firenze I-50121, Italy