Tayebee R, Amini M M, Akbari M, Aliakbari A
Department of Chemistry, School of Sciences, Hakim Sabzevari University, Sabzevar 96179-76487, Iran.
Dalton Trans. 2015 May 28;44(20):9596-609. doi: 10.1039/c5dt00368g.
A new inorganic-organic nanohybrid material H4SiW12O40/pyridino-MCM-41 was prepared and performed as an efficient, eco-friendly, and highly recyclable catalyst for the one-pot multi-component synthesis of different substituted 1-amidoalkyl-2-naphthols under solvent-free conditions. The nanohybrid catalyst was prepared through electrostatic anchoring of Keggin heteropolyacid H4SiW12O40 on the surface of MCM-41 nanoparticles modified by N-[3-(triethoxysilyl)propyl]isonicotinamide. The prepared material was characterized by XRD, SEM, EDX, UV-Vis, DTA-TGA, DLS, and FT-IR spectroscopy. Findings confirmed that the heteropolyacid is well dispersed on the surface of the solid support and its structure is preserved after immobilization on the TPI modified MCM-41 nanoparticles. The recovered catalyst was easily recycled for at least seven runs without considerable loss of catalytic activity.
制备了一种新型无机-有机纳米杂化材料H4SiW12O40/吡啶基-MCM-41，并将其用作高效、环保且可高度循环使用的催化剂，用于在无溶剂条件下一步多组分合成不同取代的1-酰胺基烷基-2-萘酚。该纳米杂化催化剂是通过将Keggin杂多酸H4SiW12O40静电锚定在由N-[3-(三乙氧基甲硅烷基)丙基]异烟酰胺改性的MCM-41纳米颗粒表面制备而成。通过XRD、SEM、EDX、UV-Vis、DTA-TGA、DLS和FT-IR光谱对所制备的材料进行了表征。研究结果证实，杂多酸很好地分散在固体载体表面，并且在固定到TPI改性的MCM-41纳米颗粒上后其结构得以保留。回收的催化剂易于循环使用至少七次，且催化活性没有明显损失。
