Design and synthesis of 1,10-phenanthroline based Zn(II) complexes bearing 1D push–pull NLO-phores for tunable quadratic nonlinear optical properties
摘要:
Three Zn(II) complexes bearing 1,10-phenanthroline and one-dimensional (ID) push-pull NLO-phores with various acceptor strength as well as pi-conjugation length have been synthesized in high yields for two-dimensional (2D) nonlinear optical response. The quadratic optical nonlinearity of the ligands and the complexes are measured by the HRS technique. The ligands show small second-order optical nonlinearity (beta) comparable to the standard, para-nitroaniline (pNA). However, upon complexation with Zn(II), each complex exhibits large beta values showing the importance of metal ion in enhancing the optical nonlinear effect. (c) 2006 Elsevier B.V. All rights reserved.