sample magnetometer (VSM) analyses. This catalyst is outstanding to prepare l‐(4‐phenyl)‐2,4‐dihydropyrano[2,3‐c] pyrazole derivatives in aqueous media due to the open metal sites, high and steady proton conductivity in the zirconium‐MOF, MIP‐202(Zr), and MOF and also due to Brønsted acid properties of tungstic acid. This acidic catalyst can easily be extracted by an outward magnetic field after completion
一种基于
钨酸固定到新设计的坚固,经济高效,绿色和可扩展的
锆-
L-天冬氨酸氨基酸金属-有机骨架(MOF)接枝的L-(+)-
酒石酸稳定磁
铁矿的新型磁性纳米催化剂纳米粒子(Fe 3 O 4/ TArt-NPs)是通过两种连续的溶剂热(
水)-热方法合成的。该催化剂的特征在于傅立叶变换红外(FT-IR),能量色散X射线能谱(EDS),X射线衍射(XRD),场发射扫描电子显微镜(FE
SEM),Brunauer-Emmett-Teller( BET),Barrett-Joyner-Halenda(BJH),ζ电位,热重分析-差热分析(TGA-DTA)和振动样品磁力计(VSM)分析。该催化剂非常适合在
水性介质中制备l-(4-苯基)-2,4-二氢
吡喃[2,3-c]
吡唑衍
生物,这是因为
锆-MOF,MIP中具有开放的
金属位点,高且稳定的质子传导性‐202(Zr)和MOF,也归因于
钨酸的布朗斯台德酸性质。反应