超小磁性氧化铁纳米颗粒的合成及其胶体与表面化学研究。
Synthesis of ultrasmall magnetic iron oxide nanoparticles and study of their colloid and surface chemistry.
作者信息
Goloverda Galina, Jackson Barry, Kidd Clayton, Kolesnichenko Vladimir
机构信息
Xavier University of Louisiana, Department of Chemistry, New Orleans, LA 70125, USA.
出版信息
J Magn Magn Mater. 2009 May 1;321(10):1372-1376. doi: 10.1016/j.jmmm.2009.02.041.
Abstract
Colloidal nanoparticles of Fe(3)O(4) (4 nm) were synthesized by high-temperature hydrolysis of chelated iron (II) and (III) diethylene glycol alkoxide complexes in a solution of the parent alcohol (H(2)DEG) without using capping ligands or surfactants: Fe(DEG)Cl(2) + 2Fe(DEG)Cl(3) + 2H(2)O + 2OH(-) → Fe(3)O(4) + 3H(2)DEG + 8Cl(-) The obtained particles were reacted with different small-molecule polydentate ligands, and the resulting adducts were tested for aqueous colloid formation. Both the carboxyl and α-hydroxyl groups of the hydroxyacids are involved in coordination to the nanoparticles' surface. This coordination provides the major contribution to the stability of the ligand-coated nanoparticles against hydrolysis.
摘要
通过在母体醇（H₂DEG）溶液中对螯合的铁（II）和（III）二甘醇醇盐配合物进行高温水解，合成了Fe₃O₄（4纳米）的胶体纳米颗粒，且未使用封端配体或表面活性剂：[Fe(DEG)Cl₂]²⁻ + 2[Fe(DEG)Cl₃]²⁻ + 2H₂O + 2OH⁻ → Fe₃O₄ + 3H₂DEG + 8Cl⁻ 所得到的颗粒与不同的小分子多齿配体反应，并对所得加合物进行水胶体形成测试。羟基酸的羧基和α-羟基均参与与纳米颗粒表面的配位。这种配位对配体包覆的纳米颗粒抗水解稳定性起主要作用。
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