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Heterogenization of Co(II)- and Cu(II)-complexes containing a terpyridine-based Schiff base macrocyclic ligand on thiol-functionalized mesostructured silica
Journal of Organometallic Chemistry ( IF 2.1 ) Pub Date : 2019-12-14 , DOI: 10.1016/j.jorganchem.2019.121073
Cristnel Solórzano , Franklin J. Méndez , Joaquín L. Brito , Pedro Silva , Juan R. Anacona , Ernesto Bastardo-González

Hexagonal mesoporous MCM-41-type molecular sieve has been functionalized with (3-mercaptopropyl)trimethoxysilane and used to heterogenized two large Co(II)- and Cu(II)-complexes containing a terpyridine-based Schiff base macrocyclic ligand. First, thiol groups were linked to the siliceous surface of the mesoporous host via grafting process. Some samples were characterized by SA-XRD, N2 physisorption, 13C-MAS-NMR, FTIR, XPS and EPR. These set of characterization techniques confirmed a successful functionalization process, and also confirmed that used experimental procedure allowed the heterogenization of Co(II)- and Cu(II)-complexes inside the pores of functionalized host, retaining the mesoporous structure. The homo- and hetero-geneous catalysts were active for cyclopentene oxidation. [email protected](F) sample was reported in this article as the best catalyst for catalytic test due to its higher activity and selectivity, as well as its low loss of catalytic activity after reuse.



中文翻译:

含三联吡啶基席夫碱大环配体的Co(II)和Cu(II)配合物在硫醇官能化介孔结构二氧化硅上的异构化

六角形介孔MCM-41型分子筛已被(3-巯基丙基)三甲氧基硅烷官能化,并用于异质化两个大的Co(II)和Cu(II)复合物,这些复合物含有基于吡啶的Schiff碱大环配体。首先,巯基通过接枝过程连接到中孔宿主的硅质表面。一些样品的特征在于SA-XRD,N 2物理吸附,13C-MAS-NMR,FTIR,XPS和EPR。这套表征技术证实了成功的官能化过程,并且还证实了所使用的实验程序允许Co(II)-和Cu(II)-复合物在官能化主体孔内异质化,并保留了介孔结构。均相和非均相催化剂对环戊烯氧化具有活性。[电子邮件保护](F)样品因其较高的活性和选择性以及重复使用后催化活性的低损失而被报道为催化测试的最佳催化剂。

更新日期:2019-12-17
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