Design,Synthesis And Properties Of Salicylaldehyde Bis Schiff Base Metal Complexes

Salicylaldehyde bis Schiff bases are four tooth ligands of bifunctional groups.They have good electron transfer properties and strong coordination.They can form stable complexes with most metal ions.They are widely used in medicine,catalysis,sensing,optics and other fields.Among them,titanium complexes with bis Schiff base of salicylaldehyde show high efficiency and controllable performance in polymerization catalysis,which has attracted wide attention.In this paper,the synthesis of titanium complexes with salicylaldehyde bis Schiff bases and chiral salicylaldehyde bis Schiff bases was studied.1.Three kinds of Schiff base titanium metal complexes with different structures were synthesized by the reaction of salicylaldehyde double schiff base and titanate under hydrothermal conditions.The effects of reaction temperature,solvent,time,reactant ratio and titanium source on the product structure were investigated.The product was verified by ~1H NMR,IR and X-ray.The morphology of the product was discussed.Characteristics and thermal stability.2.The Chiral Schiff base was synthesized by the reaction of 3,5-di-tert-butyl salicylaldehyde and(S)-(-)-diaminopropane dihydrochloride at room temperature and alkaline conditions.The influence of reaction solvent on the reaction process was investigated.The product was verified by IR and X-ray.The near-infrared optical properties and second-order nonlinear optical properties of the product were preliminarily discussed.