含肽键芳酰腙镧（III）配合物的合成、表征及对四种作物病害的抑制作用

摘要

A new complex of lanthanum( III) with 2-oxo-propionic acid salicyloyl hydrazone,which was a fragrant acylhydrazone con-taining peptide bond,had been synthesized. The formula of the complex was La( H2 L) ( HL)·H2 O( H3 L=2-oxo-propionic acid sali-cyloyl hydrazone C10 H10 N2 O4 ) which was confirmed by elemental analysis,chemical analysis and molar conductance. IR,UV and FS results indicated that the ligand was bonded to La3+ in tridentate coordination mood via carboxy and carbonyl oxygen atoms and ni-trogen atom of imidogen. The coordinated atoms formed a stable structure by two same side five-member ring. The potted plant test of four crops diseases showed the complex had inhibition for them,the prevention and cure effect of the complex against Puccinia stri-iformis Westendorp was 80. 8%.%合成了未见文献报道的镧(III)与含肽键芳酰腙配体(2-羰基丙酸水杨酰腙)的配合物，经化学分析、元素分析及摩尔电导率等表征推测其组成为：La( H2 L)( HL)·H2 O( H3 L为2-羰基丙酸水杨酰腙C10 H10 N2 O4)。通过红外、紫外及荧光的研究表明配体以羧基氧、羰基氧和亚氨基氮与La3+三齿配位，形成了两个共边五元环的稳定结构。盆栽活体试验表明该配合物对四种作物病害都有不同程度的抑制作用，其中对小麦条锈病的防治效果最好，防治效果达80．8%。