Structure and Fertilizer Properties of Byproducts Formed in the Synthesis of EDDHA
作者:Lourdes Hernández-Apaolaza、Sonia García-Marco、Paloma Nadal、Juan J. Lucena、Miguel A. Sierra、Mar Gómez-Gallego、Pedro Ramírez-López、Rosa Escudero
DOI:10.1021/jf0605749
日期:2006.6.1
The synthesis of commercial EDDHA produces o,o-EDDHA as the main reaction product, together with a mixture of regioisomers (o,p-EDDHA and p,p-EDDHA) and other unknown byproducts also able to complex Fe3+. These compounds have been obtained by direct synthesis, and their structures have been determined by ESI-MS analysis as oligomeric EDDHA-like products, formed by polysubstitution in the phenolic rings
商业EDDHA的合成产生o,o-EDDHA作为主要反应产物,以及区域异构体(o,p-EDDHA和p,p-EDDHA)与其他未知副产物的混合物,这些副产物也能够络合Fe3 +。这些化合物是通过直接合成获得的,并且它们的结构已经通过ESI-MS分析确定为低聚EDDHA样产物,通过在酚环中的多取代而形成。短期实验表明,富含这些低聚副产物的样品中的铁配合物在溶液中具有足够的稳定性,但在与土壤和土壤物质相互作用后会大量损失。轻度的中性黄瓜植株从o,p-EDDHA / Fe3 +还原铁的能力比低聚副产物的铁络合物更好。在水培法中 因此,易受叶绿素影响的植物从这些副产物中吸收铁的可能性要比从o,o-EDDHA / Fe3 +和o,p-EDDHA / Fe3 +中吸收的铁低。在研究条件下,EDDHA副产物的铁螯合物不具有o,o-EDDHA / Fe3 +所显示的持久作用,并且比o,p-EDDHA / Fe3