Abstract : Cyclometallated platinum (II) acetylide complexes are known for their strong phosphorescence which is versatile to its chemical environment. The use of such complexes is in adequacy to the actual need in luminescent molecular. The acetylide ligand integrates the receptor which is able to coordinate transition metal cations. The choice of the receptor lies in both its fitness in the cation coordination and in contribution to the luminescence properties of the complex. Our strategy was successful; we report series of complexes which are selective, namely to lead cation. In addition, cation binding gives rise to a variety of unprecedented photoluminescent processes: improving or quenching the luminescence, switching phosphorescence to fluorescence. The origin of those processes is depicted through the different chapters of this thesis.