a
School of Chemistry & CRANN, University of Dublin, Trinity College, Dublin 2, Ireland
E-mail: schmittw@tcd.ie
;
Tel: +353-1-896-3495
b
CNRS, CRPP, F-33600 Pessac, France
c
Univ. Bordeaux, CRPP, F-33600 Pessac, France
d
School of Physics & CRANN, University of Dublin, Trinity College, Dublin 2, Ireland