1. Dipartimento
di Chimica, University of Parma, Parco Area delle Scienze 17/A, I-43100 Parma, Italy
2. L3-
Luminescent Lanthanide Lab, f-Element Coordination Chemistry, Department
of Inorganic and Physical Chemistry, Ghent University, Krijgslaan
281-S3, B-9000 Ghent, Belgium