[1] Univ Freiburg, Freiburger Mat Forschungszentrum, D-79104 Freiburg, Germany
[2] Univ Freiburg, Freiburg Inst Adv Studies, D-79104 Freiburg, Germany
[3] Univ Freiburg, Inst Makromol Chem, D-79104 Freiburg, Germany
[4] Univ Strasbourg, LIPHT ECPM, F-67087 Strasbourg, France
[5] Univ Bordeaux 1, Lab Chim Polymeres Organ, ENSCBP, Inst Polytech Bordeaux,CNRS UMR 5629, F-33607 Pessac, France