光活性金纳米软草酸酯（SOM）与Keplerate光聚合制备聚苯乙烯乳胶微球
Photoactive Gold Nanoparticle Soft-oxometalates (SOM) using a Keplerate for Synthesis of Polystyrene Latex Microspheres by Photo-polymerization
摘要：
报道了一种绿色、简便的合成方法，利用一种独特的Keplarate型氧钼酸盐簇合物{Mo $_{132}$ }制备了具有光活性的纳米金-软草酸盐（AuNP-SOM）。通过电子吸收光谱、拉曼光谱和高分辨透射电子显微镜（HR-TEM）对合成的AuNP-SOM进行了表征。我们进一步证明，仅仅通过调整溶液中的前体的比例，它是可能的控制AuNP-SOM纳米结构的形态。此外，这些光活性的AuNP-SOMs被用作光催化剂，用于苯乙烯的光聚合，以可控的方式在没有任何外部共引发剂或惰性气氛下生成胶体单分散聚苯乙烯微球。用动态光散射和光学显微镜研究了苯乙烯浓度对微球尺寸的影响。最后，通过几个对照实验，确定了AuNP-SOMs作为高效光催化剂的作用，并提出了反应途径。
英文摘要：
A green and facile synthetic protocol for the preparation of photoactive gold nanoparticle-soft oxometalates (AuNP-SOM) using a unique Keplarate type oxomolybdate cluster viz. {Mo$_{132}$}, is reported. The as synthesized AuNP-SOMs are fully characterized by Electronic absorption spectroscopy, Raman spectroscopy and High resolution transmission electron microscopy (HR-TEM). We further demonstrate that by merely tuning the ratio of the precursors in solution it is possible to control the morphology of AuNP-SOM nanostructures. Moreover, these photoactive AuNP-SOMs are employed as photocatalysts for the photopolymerization of styrene to generate colloidal monodisperse polystyrene microspheres in a controllable way in the absence of any external co-initiator or inert atmosphere. Effect of styrene concentration on the size of microspheres is studied using DLS and optical microscopy. Finally, the role of AuNP-SOMs as efficient photocatalyst is established through several control experiments and a reaction pathway is proposed.
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