[1] Bowling Green State Univ, Dept Chem, Bowling Green, OH 43403 USA
[2] Univ Strasbourg 1, GMO, Inst Phys & Chim Mat Strasbourg, F-67034 Strasbourg, France
[3] CNRS, F-67034 Strasbourg, France
[4] CNR, Lab Fotochim, Ist Sintesi Organ & Fotoreatt, I-40129 Bologna, Italy