A magnetic inorganic-organic catalyst, [email protected]₃O₄/EN-MIL-101 (EN = ethylenediamine, PTA = phosphotungstic acid) was fabricated and characterized by XRD, HRTEM, FESEM, UV–vis, TGA-DTA, FT-IR, XPS and porosimetry. PTA retained the parent Keggin structure upon dispersion throughout the amine-functionalized chromium terephthalate metal-organic framework, over which magnetic Fe₃O₄ nanoparticles were previously introduced. The resulting composite heterogeneous solid acid was an active catalyst for the one-pot synthesis of diverse 2H-indazolo[2,1-b] phthalazine-triones in good → excellent yields under mild, solventless condition, and offers facile separation and excellent recyclability.

制备了一种磁性无机有机催化剂，[受电子邮件保护] ₃ O ₄ / EN-MIL-101（EN =乙二胺，PTA =磷钨酸），并通过XRD，HRTEM，FESEM，UV-vis，TGA-DTA，FT进行了表征-IR，XPS和孔隙率法。PTA分散在整个胺官能化的对苯二甲酸铬金属-有机骨架上时保留了母体Keggin结构，先前已在该骨架上引入了磁性Fe ₃ O ₄纳米粒子。所得的复合非均相固体酸是一种活性催化剂，可在温和无溶剂的条件下以良好→优异的收率一锅法合成各种2H-吲唑并[2,1- b ]邻苯二甲腈-三酮，并易于分离且具有出色的可回收性。