[1] Univ Erlangen Nurnberg, Inst Phys & Theoret Chem, D-91058 Erlangen, Germany
[2] Univ Notre Dame, Radiat Lab, Notre Dame, IN 46556 USA
[3] Univ Bologna, Dipartimento Chim G Ciamician, I-40126 Bologna, Italy
[4] Univ Trieste, Dipartimento Sci Farmaceut, I-34127 Trieste, Italy