NLO active Cu<sup>II</sup>/Ru<sup>II</sup> and Cd<sup>II</sup>/Ru<sup>II</sup> coordination-organometallic complexes: synthesis, structural characterization and photoluminescence properties
作者:B. G. Bharate、S. S. Chavan
DOI:10.1080/00958972.2016.1229475
日期:2016.11.16
Cu-II/Ru-II and Cd-II/Ru-II hybrid complexes [Cu(L1-3)(NC5H4CCRu(dppe)(2)Cl)] (1a-3a) and [Cd(L1-3)(NC5H4CCRu(dppe)(2)Cl)] (1b-3b) have been prepared by reaction of trans-[RuCl(dppe)(2)(CC-py-3)] (1) with copper or cadmium acetate in the presence of Schiff base ligands LH1-3 (where L-H=2-(pyrrole-2-yl-methylidine)aminophenol (L-H1), 5-bromo-2-(pyrrole-2-yl-methylidine)aminophenol (L-H2) and 5-nitro-2-(pyrrole-2-yl-methylidine)aminophenol (L-H3)). The hybrid materials were characterized on the basis of elemental analyses, TEM, IR, UV-visible, H-1 NMR, and P-31 NMR spectral studies. TEM overview observations revealed well-dispersed spherical nanoparticles of similar to 60nm are formed. Quasireversible redox behavior is observed for Cu-II/Ru-II complexes corresponding to Cu-I/Cu-II and Ru-II/Ru-III couples. All the complexes exhibit blue-green emission as a result of fluorescence from the intraligand (*) emission excited state with good quantum yield. The second-order nonlinear optical (NLO) properties of Cu-II/Ru-II and Cd-II/Ru-II complexes have been investigated by the Kurtz-powder method. The second harmonic generation efficiency of these complexes show that these complexes are NLO active and display good second-order nonlinear optical activity.[GRAPHICS].