Abstract

Co(II) macrocyclic Schiff base complex nanoparticles have been encapsulated in the nanopores of zeolite Y. The new Schiff base complexes entrapped in the nanoreactor of zeolite Y were characterized by several techniques: chemical analysis and spectroscopic methods (FT-IR, XRD, and DRS). These complexes (neat and encapsulated) were used for epoxidation of alkenes with O₂ as oxidant in different solvents. The catalyst demonstrated excellent activity for a variety of alkenes in a mild, inexpensive and efficient protocol. Reaction parameters including temperature, catalyst amount and solvent were screened by reaction time. The recycling experiment results indicated that the catalysts were highly stable and maintained activity and selectivity even after being used for five cycles.

中文翻译：

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Co(II) 席夫碱配合物封装在 Y 型沸石纳米孔中作为多相催化剂用于烯烃与分子氧的选择性环氧化

摘要

Co(II) 大环席夫碱复合纳米粒子已被封装在 Y 沸石的纳米孔中。 夹在 Y 沸石纳米反应器中的新席夫碱复合物通过多种技术进行表征：化学分析和光谱方法（FT-IR、XRD 和DRS）。这些配合物（纯的和包封的）用于在不同溶剂中以 O ₂作为氧化剂对烯烃进行环氧化。该催化剂在温和、廉价和高效的方案中对各种烯烃表现出优异的活性。通过反应时间筛选反应参数，包括温度、催化剂用量和溶剂。回收实验结果表明，该催化剂即使在使用五次循环后仍保持高度稳定并保持活性和选择性。