Synthesis, characterization, Langmuir-Blodgett film-forming property, and second-order nonlinear optical study of rhenium(I) and ruthenium(II) diimine complexes

摘要

A series of rhenium(l) and ruthenium(II) complexes of general formulas fac-[Re(CO)(3)CIL] and [Ru(bpy)(2)L](PF6)2 (L = N-(4-biphenyl)pyridine-2-carbaldirnine (L1), N-[4-(4'-octadecyloxy)biphenyllpyridine-2-carbaldimine (L2), (5-octadecyjoxy)-2-pyridine-N-(4-biphenyl)carbaidimine (L4), and (5-octadecyloxy)2-pyridine-N-[4-(4'-octadecyloxy)biphenyl]carbaidimine (L4)) were synthesized and characterized, and their photophysical properties were also studied. The X-ray crystal structures of fac-[Re(CO)(3)ClL1] and [Ru(bpY)(2)L1](PF6)(2) have been determined. These complexes were capable of forming stable LangmuirBlodgett (LB) films, as revealed by the study of their surface pressure-area (pi-A) isotherms, and their second-harmonic generation (SHG) properties were also investigated.