聚酰胺酸盐稳定的金纳米催化剂用于羧酸的绿色合成

使用一锅法成功制备了水溶性聚酰胺酸盐稳定的金纳米催化剂(AuNPs-PAAS),将该催化剂用于伯醇的催化氧化.利用紫外-可见分光光度计,X射线衍射仪(XRD),透射电子显微镜(TEM)等表征方法对催化剂进行了表征.结果表明,金纳米粒子在聚酰胺酸溶液中处于均匀分散状态,金纳米尺寸约为5 nm.将制备的纳米金催化剂用于伯醇的氧化,评价了其在伯醇氧化成羧酸反应中的催化性能,结果显示,在空气为氧化剂,水为溶剂的条件下,AuNPs-PAAS对伯醇的催化氧化为高效的准均相催化过程,高选择性得到羧酸产物,通过调节溶液的pH值,可以很容易的实现产物与反应体系分离和催化剂的回收和循环利用.

Green Synthesis of Carboxylic Acid Using Poly(Amic Acid) Salt-Stabilized Gold Nanoparticles

In this work, water-soluble gold nanoparticles stabilized by poly(amic acid) salt (AuNPs-PAAS) were synthesized by a one-pot method and were used for the catalytic oxidation of primary alcohols .The catalysts were characterized by using UV-vis absorption, powder X-ray diffraction, transmission electron microscopy, analysis results shows that the gold nanoparticles are highly dispersed in the PAAS solution with a diameter of about 5 nm. The catalytic experiment results indicate that, the AuNPs-PAAS catalyzed oxidation of primary alcohols in water allowed for highly efficient quasi-homogeneous catalytic reactions using air as oxidant, carboxylic acids were obtained with high selectivity, the products were easy to be separated and the catalyst was easy to be recovered by adjust the pH value of the reaction mixture.