Syntheses, characterization and glass-forming properties of new bis[5-((4-ndodecyloxyphenyl)azo)-N-(4-nalkoxyphenyl)-salicylaldiminato]nickel (II) complex homologues
摘要:
A series of bidentate Schiff base ligands, 5-((4-(n)dodecyloxyphenyl)azo)-N-(4-(n)alkoxyphenyl)-salicylaldimine ((n)alkoxy = octyloxy, dodecyloxy, hexadecyloxy) homologues, have been synthesized and characterized by IR, NMR, mass spectroscopy and elemental analyses. Nickel (II) complexes of these ligands were synthesized and characterized by elemental analyses, H-1 NMR and IR spectroscopy. DSC measurements, X-ray powder diffraction experiments and optical polarizing microscopy studies indicated that the Ni complexes have a resistance to crystallization and give an amorphous glassy state but after annealing at room temperature for several days transform to an anisotropic glass. (c) 2005 Elsevier Ltd. All rights reserved.