Synthesis, Characterization, and Second-Harmonic Generation Studies of Surfactant Rhenium(I) Diimine Complexes in Langmuir−Blodgett Films. X-ray Crystal Structure of fac-ClRe(CO)3L (L = 9-Heptylamino-4,5-diazafluorene)

A series of surfactant complexes of general formula, fac -ClRe(CO) 3 L (L = 9-octadecylamino-4,5-diazafluorene, 9-(4‘-hexadecylanilino)-4,5-diazafluorene, N -(4‘-hexadecylphenyl)pyridine-2-carbaldimine, and 9-heptylamino-4,5-diazafluorene), were synthesized and characterized by elemental analyses and 1 H NMR, UV−vis, IR, and luminescence spectroscopy. The complex fac -ClRe(CO) 3 L (L = 9-heptylamino-4,5-diazafluorene) was structurally characterized. The formation and optical properties of their Langmuir−Blodgett (LB) films were studied by surface pressure−area (π−A) isotherms and UV−vis and luminescence spectroscopy, and the second-harmonic generation (SHG) behavior was also investigated.