1. Research Center for Macromolecular Materials and Membranes, Spl. Independentei 206, Bucharest 79611, Romania
2. University of Bucharest, Department of Inorganic Chemistry, Str. Dumbrava Rosie 23, Bucharest, Romania
3. Polytechnic University of Bucharest, Department of Inorganic Chemistry, Polizu 1, Bucharest 79611, Romania
4. Università degli Studi, Laboratorio di Chimica Inorganica e Bioinorganica, Via Gino Capponi 7, Florence I-50121, Italy