组氨酸-银纳米微粒的制备与表征(英文)

Synthesis and characterization of histidine-silver(Ⅰ) nanoparticles

背景:近年来,国内外学者对金属离子与氨基酸作用的研究很广泛,但有关银离子与氨基酸作用的研究相对较少。目的:应用X射线衍射、透射电镜、红外光谱对合成的组氨酸-银固体物种的表面结构进行表征。方法:在微乳液中制备出组氨酸-银配合物的固体物种,并用X射线衍射、透射电镜、红外光谱对其结构与形貌进行表征。结果与结论:红外光谱分析显示组氨酸中的咪唑环参与了同银离子的成键作用。X射线衍射图谱测得组氨酸-银晶粒的平均粒径为34.6nm。透射电镜形貌图表明组氨酸-银配合物微粒形成莓球状集合体而被吸附于柱状物表面,配合物微粒的大小都在100nm以内。

BACKGROUND： In recent years, many domestic and international studies on the interaction of metal ions and amino acids have been reported. However, the interaction of sliver ions and amino acids is rarely reported. OBJECTIVE： To characterize the synthesized histidine-silver（I） nanoparticles using X-ray diffraction, transmission electron microscope and infrared spectroscope. METHODS： The histidine-silver（I） nanoparticles were synthesized from micro emulsions, then the structures and the morphology of the nanoparticles were characterized with X-ray diffraction, transmission electron microscope and infrared spectroscope. RESULTS AND CONCLUSION： Infrared spectroscopy analysis showed that the imidazole ring of hisditine was involved in the bonding effect to silver（I）. X-ray diffraction pattern showed the mean particle size of histidine-silver（I） was 34.6 nm. Topographical image measured with transmission electron microscope presented that the hisditine-silver（I） complexes can be adsorbed on the surface of the columnar product due to the formation of framboidal aggregates, and the size of the complex particles are less than 100 nm.