作者:Stephanie K. Hurst、Nigel T. Lucas、Marie P. Cifuentes、Mark G. Humphrey、Marek Samoc、Barry Luther-Davies、Inge Asselberghs、Roel Van Boxel、André Persoons                                    
                                    
                                        DOI:10.1016/s0022-328x(01)01077-4
                                    
                                    
                                        日期:2001.8
                                    
                                    The acetylenes 4-HC drop CC6H4R [R=CHOC(O)Me}(2) (1), CHO(CH2)(3)O (2)], ruthenium complexes [Ru(4-C drop CC6H4R)(PPh3)(2)- (eta -C5H5)] [R = CHOC(O)Me}(2) (3), CHO (4)], [Ru(n-C=CHC6H4R)Cl(dppm)(2)]PF6 [n = 4, R = CHO(CH2)(3)O (7); R = CHO, n = 3 (11), 2 (15)], and [Ru(n-C drop CC6H4R)Cl(dppm)(2)] [n = 4, R = CHO(CH2)(3)O (8); n = 3, R = CHO (12)], and gold complexes [Au(n-C drop CC6H4R)(L)] [n = 4, R = CHO, L = PPh3 (5), PMe3 (6); n = 4, R = CHO(CH2)(3)O, L = PPh3 (9), PMe3 (10); n = 3 R = CHO, L = PPh3 (13), PMe3 (14)] have been prepared, and 9 characterized by a single crystal X-ray diffraction study. Electrochemical data for the ruthenium complexes reveal reversible or quasi-reversible (alkynyl complexes) or irreversible (vinylidene complexes) processes assigned to the Ru-II/III couple; the effect on E-1/2 values of the various structural modifications across 3, 4, 7, 8, 11, 12 and 15 are discussed. The molecular quadratic and cubic optical nonlinearities of 1-15 have been determined by the hyper-Rayleigh scattering technique at 1064 mn and the Z-scan technique at 800 nm. respectively; beta values increase on increasing the acceptor strength, proceeding from 3-acceptor-substituted to 4-acceptor-substituted arylalkynyl ligand, and an increasing phosphine donor strength, whereas gamma values increase on increasing the number of phosphine aryl groups (i.e. increasing delocalization) proceeding from PMe3 to PPh3-containing complex. (C) 2001 Published by Elsevier Science B.V.