1. Centre of New Technologies, University of Warsaw, S. Banacha 2c, Warsaw 02-097, Poland
2. Department of Chemistry, University of Warsaw, Zwirki i Wigury 101, Warsaw 02-089, Poland
3. Univ. Bordeaux, CNRS, Bordeaux INP, ISM, UMR 5255, Talence F-33400, France
4. Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, Warsaw 01-224, Poland