Synthesis, crystal structure and catalytic activity of a new Mo Schiff base complex with Mo histidine immobilized on Al-MCM-41 for oxidation of sulfides
Synthesis, crystal structure and catalytic activity of a new Mo Schiff base complex with Mo histidine immobilized on Al-MCM-41 for oxidation of sulfides
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Al-MCM-41 上固定 Mo 组氨酸的新型 Mo 席夫碱配合物的合成、晶体结构及催化硫化物氧化活性
DOI：
10.1016/j.ica.2014.01.028
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发表时间：
2014
影响因子：
2.8
通讯作者：
Mahboobeh Maghami
中科院分区：
文献类型：
--
作者：
Elham Zamanifar;F. Farzaneh;J. Simpson;Mahboobeh Maghami
合成了水杨醛和l-组氨酸席夫碱配体的顺式二氧钼(VI)配合物，命名为MoO2(Sal-His)。用元素分析、FT-IR、UV-Vis和TGA对MoO2(SAL-His)进行了表征。X射线结晶学研究表明，钼在MoO2中的配位(SAL-His)是由四齿组氨酸Schiff碱配体和两个结合氧原子形成的扭曲八面体。将MoO2(Sal-His)单独或固定在Al-MCM-41分子筛上，以H_2O_2为氧化剂，对多种硫化物进行亚磺化反应。后者是一种活性高、可重复使用的多相亚硫氧化催化剂，具有70~99%的转化率和80~95%的选择性。
A cis-dioxomolybdenum(VI) complex with Schiff base ligand derived from salicylaldehyde andl-histidine was prepared and designated as MoO2(Sal-His). Characterization of MoO2(Sal-His) was accomplished with elemental analysis, FT-IR, UV–Vis and TGA. X-ray crystallography studies revealed that the coordination of Mo in MoO2(Sal-His) is a distorted octahedron formed by tetradentate histidine Schiff base ligand and two binding oxygen atoms. MoO2(Sal-His) was used either alone or immobilized within Al-MCM-41 as sulfoxidation catalyst for a variety of sulfides with H2O2as oxidant. The latter proved to be a very active and reusable heterogeneous sulfoxidation catalyst, providing 70–99% conversion and 80–95% selectivity.