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Título : Heterogenization of Co II and CuII complexes containing a terpyridine-based Schiff base macrocyclic ligand on thiol- functionalized mesostructured silica
Autor : Solórzano, Cristnel
Mendez, Franklin J.
Brito, Joaquín L.
Silva, Pedro
Anacona, Juan R.
Bastardo González, Ernesto
Palabras clave : 2,2′:6′′,2′-terpyridine
Co(II)- and Cu(II)-complexes
Cyclopentene oxidation
MCM-41
Surface functionalization
Fecha de publicación : 2020
Editorial : Elsevier
Citación : Sol, C., Mendez, F. J., Brito, J. L., & Silva, P. (2020). Heterogenization of Co(II)-and Cu(II)-complexes containing a terpyridine-based Schiff base macrocyclic ligand on thiol- functionalized mesostructured silica. (Elsevier, Ed.) Science Direct, 908. doi:10.1016/j.jorganchem.2019.121073
Resumen : Hexagonal mesoporous MCM-41-type molecular sieve has been functionalized with (3-mercaptopropyl)trimethoxysilane and used to heterogenize 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 FTIR, ICP-AES, SA-XRD, N2 physisorption, 13C-MAS-NMR, XPS and EPR. This set of characterization techniques confirmed a successful functionalization process, and also confirmed that the used experimental procedure allowed the heterogenization of Co(II)- and Cu(II)-complexes inside the pores of the functionalized host, retaining the mesoporous structure. The homo- and heterogeneous catalysts were active for cyclopentene oxidation. Co@MCM(F) sample was reported in this article as the best catalyst due to its higher activity and selectivity, as well as its low loss of catalytic activity after reuse.
URI : http://repositorio.ikiam.edu.ec/jspui/handle/RD_IKIAM/333
doi:10.1016/j.jorganchem.2019.121073
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