[1] Polish Acad Sci, Inst Catalysis & Surface Chem, PL-30239 Krakow, Poland
[2] Univ Catholique Louvain, Lab Inorgan Chem & Organ Mat, CMAT, Dept Chem, B-1348 Louvain, Belgium
[3] Enitechnol Div, I-20097 San Donato Milanese, Italy
[4] CALTECH, Beckman Inst, Pasadena, CA 91125 USA