University of Bologna

J. P. Anne, Universiiy of Aix-Marseilles III, France J. Chouteau, University of Aix-Marseilles III, France i. Crousier, University of Aix-Marseilles I, France H. J. M. Don, University of Alx-Marseilles III, France L. Foriani, University of Bologna, Italy J. Metzger, University of Aix-Marseilles III, France R. Meyer, University of Aix-Marseilles III. France G. MQle, University of Aix-Marseilles III, France P. Todesco, University of Bologna, Italy G. Vemin, University of Aix-Marseilles III, France E. J. Vincent, University of Aix-Marseilles III, France... 

Acknowledgements. This work has been supported by MIUR (Supramolecular Devices Project), University of Bologna (Funds for Selected Topics), and EC (HPRN-CT-2000-00029). C.S. acknowledges the Swiss National Science Foundation for financial support. 

Department of Industrial Chemistry and Materials, University of Bologna, 4 Viale Risorgimento, 40136 Bologna, Italy... 

Department of Physical Chemistry, University of Venice, Venezia-Mestre, Italy CEMES, Toulouse Cedex 4, France Department of Physics, University of Roma Tre, Rome, Italy OGG-GILDA c/o ESRF Grenoble, France Department of Physics, University of Bologna, and IMM-CNR, Bologna, Italy... 

Acknowledgement. This work was supported by the University of Bologna (Funds for Selected Research Topics) and by the EU (TMR grant FMRX-CT96-0031). 

We would like to thank all the people who have contributed to the work described in this report and in particular the co-workers who are individually recognized in the cited references. Financial support from MIUR and University of Bologna is gratefully acknowledged. 

The author s research activity on this topic is supported by a grant from the University of Bologna. 

University of Bologna Department of Pharmacology Via Imerio 48 40126 Bologna BO Italy... 

University of Bologna Dipartimento di Chimica Industriale e dei Materiali Alma Mater Studiorum Viale Risorgimento 4 40136 Bologna Italy... 

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