1. Melville Laboratory for Polymer
Synthesis, Department of Chemistry, University of Cambridge, Cambridge CB2 1EW, U.K.
2. EPSRC National Crystallography
Service, University of Southampton, Southampton
SO17 1BJ, U.K.
3. Laboratoire
Léon Brillouin, CEA Saclay, Gif-sur-Yvette
Cedex 91191, France
4. Institute
of Chemical Sciences,
School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh EH14 4AS, U.K.
5. Department of Physics, University of Patras, Patras 26500, Greece