Multifunctional Organometallic Compounds: An Interesting Luminescent NLO-Active Alkynylplatinum (II) Complex

Reaction of 4-methylphenylacetylide with the known chlorido platinum(II) complex bearing the cyclometalated 1,3-bis(pyridin-2-yl)-4,6-difluoro-benzene ligand afforded a novel alkynyl platinum(II) complex, 1, that was fully characterized by elemental analysis, NMR and UV-visible spectroscopies, by photoluminescence measurements, and by computational modelling. Its structure was determined by X-ray diffraction studies on a single crystal whereas its second-order nonlinear optical (NLO) properties were determined in solution by the Electric-Field Induced Second Harmonic generation method. The novel multifunctional complex 1 is characterized by good luminescence properties, like the related chlorido Pt(II) complex, but by a much higher second-order NLO response.