Second order optical nonlinearities of copper(II) and palladium(II) complexes with N-salicylidene-N′-aroylhydrazine tridentate ligands

Article abstract of DOI:10.1002/ejic.200300735

Three new N-salicylidene-N′-aroylhydrazines tridentate ligands have been prepared: N-4-diethylaminosalicylidene-N′-(4-nitrocinnamoylhydrazine (L¹), N-4-diethylaminosalicy-lidene-N′-4-(2,4- dinitrophenylethylidene)benzoylhydrazine (L2), N-4-diethylaminosalicylidene- N′-4-(6-nitro-2-benzoxazolyl)benzoylhydrazine (L3). From these ligands, mononuclear acentric complexes of Copper(II) and Palladium(II), with pyridine as further ligand, have been prepared and characterized, also by single-crystal X-ray analysis. These complexes show high second order nonlinear optical activity (EF-ISH, |αβ| up to 3000·10^-48 esu, incident wavelength 1.907 pm). The properties of metallorganic polymers obtained by grafting commercial poly(4-vinylpyridine) with ML¹ fragment (M = Cu^II or Pd^II) are also reported. Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2004.