Heidari Sara, Alavinia Sedigheh, Ghorbani-Vaghei Ramin
Department of Organic Chemistry, Faculty of Chemistry, Bu-Ali Sina University, Hamadan, 6517838683, Iran.
Sci Rep. 2023 Aug 10;13(1):12964. doi: 10.1038/s41598-023-40190-w.
Nanohybrid metal-organic frameworks (MOF) have recently been considered next-generation catalysts regarding their unique features like large surface-to-volume ratio, tailorable geometry, uniform pore sizes, and homogeneous distribution of active sites. In this report, we address the triazine-aminopyridine-modified 3D Cr-centred MOF MIL-101(Cr)-NH following a post-synthetic modification approach. The excellent chelating ability of triazine-aminopyridine was applied to immobilize Ni ions over the host matrix MOF. The as-synthesized material was physicochemically characterized using various analytical techniques like FT-IR, electron microscopy, EDS, elemental mapping, XRD, and ICP-OES. Subsequently, the material has been catalytically employed in synthesizing new thiourea derivatives by reacting to nitrobenzene derivatives and phenyl isocyanate. The catalyst was isolated by centrifugation and recycled in 6 consecutive runs without momentous loss of its reactivity.
纳米杂化金属有机框架（MOF）因其独特的特性，如大的比表面积、可定制的几何结构、均匀的孔径以及活性位点的均匀分布，最近被视为下一代催化剂。在本报告中，我们采用后合成修饰方法处理三嗪 - 氨基吡啶修饰的以铬为中心的三维MOF MIL - 101（Cr）-NH。利用三嗪 - 氨基吡啶出色的螯合能力将镍离子固定在主体基质MOF上。使用各种分析技术，如傅里叶变换红外光谱（FT - IR）、电子显微镜、能谱分析（EDS）、元素映射、X射线衍射（XRD）和电感耦合等离子体发射光谱（ICP - OES）对合成的材料进行了物理化学表征。随后，该材料被用于催化硝基苯衍生物与苯基异氰酸酯反应合成新的硫脲衍生物。通过离心分离催化剂，并连续循环使用6次，其反应活性没有显著损失。
