A novel ternary GO@SiO
<sub>2</sub>
‐HPW nanocomposite as an efficient heterogeneous catalyst for the synthesis of benzazoles in aqueous media
作者:Setareh Habibzadeh、Ghasem Firouzzadeh Pasha、Mahmood Tajbakhsh、Nasim Amiri Andi、Ehsan Alaee
DOI:10.1002/jccs.201800323
日期:2019.8
electron microscopy (SEM), and powder X‐ray diffraction (XRD). The prepared nanocomposite could be dispersed homogeneously in water and further used as a heterogeneous, reusable, and efficient catalyst for the synthesis of benzimidazoles and benzothiazoles by the reaction of 1,2‐phenelynediamine or 2‐aminothiophenol with different aldehydes.
一种新型的固体酸催化剂,由12-磷钨杂多酸(HPW)负载在氧化石墨烯/二氧化硅纳米复合材料(GO @ SiO 2)上,已通过配位相互作用将HPW固定在胺官能化的GO / SiO 2表面上而开发出来( GO @ SiO 2 -HPW)。GO @ SiO 2‐HPW纳米复合材料的特征在于傅立叶变换红外(FT-IR)光谱,热重分析(TGA),扫描电子显微镜(SEM)和粉末X射线衍射(XRD)。制备的纳米复合材料可均匀分散在水中,并进一步用作通过1,2-苯乙炔二胺或2-氨基苯硫酚与不同醛反应合成苯并咪唑和苯并噻唑的多相,可重复使用且有效的催化剂。