1. Department of Industrial Engineering, Katholieke Hogeschool Sint−Lieven, Gebroeders Desmetstraat
1, B-9000 Gent, Belgium
2. Department of Chemistry, Katholieke Universiteit Leuven, Celestijnenlaan 200F P.O. Box 2404, B-3001 Heverlee,
Belgium
3. Department of Inorganic and Physical Chemistry, Universiteit Gent, Krijgslaan 281 -
Building S3, B-9000
Gent, Belgium