4(%3)3 - Ecole nationale supérieure de chimie de Montpellier

This work has been completed with contribution of several people that Ihad privilege to work with during these 3 years. First of all, I would like to thank,my director Dr. Damien Quémener, whose constant guidance throughout theseyears, immense help and motivation during the work in the laboratory andmanuscript writing and having confidence in me till the end. Thank you Damienfor all the skills that I have learnt from you…. I am equally thankful to mydirector Dr. Serge Lagerge for all the motivation, help he bestowed to me. Myextreme gratitude to both of you for accepting me as your PhD student andhaving confidence in me..I would like to express my gratitude for Professor Henry Cramail(University of Bordeaux - 1) and Dr. Francois Tournilhac (ENSPCI) and Dr. DidierGigmes (University of Aix-Marseilles –I, II, III) to accept the invitation of judgingthis work.Special thanks for Dr. André Deratani, chief of the group for his greathuman nature, leadership skills, providing me all the means to complete my worksuccessfully in the lab.My since gratitude to Eddy petit, Dr. Sylvie Condom and Didier Cot for theirhelp and motivation, they gave me during my work. It was such a greatexperience to work and interact with such skillful and gentle people.Thanks to all the people, whom I met and worked together at the labduring these three years: Guilhem, Loic, Julian, Zuzanna, Haytem, Sana, Louise,Jean-claude, Elsa, Irina, Tammy, Oualid, Amira, Severine, Luminita, Aazima,Laura, Marleny, Lara, Arnaud, Valerie, Kevin, Bastien and every other personwho helped me to complete this work successfully. My special thanks for Guilhemand Loic, without whom a lot of things of this would have been impossible toachieve.In the end, my thanks to my family and my four friends for believing in meand giving me constant support during all these years.Once again….. Thanks to all !!!