TRIPLE SYSTEMS, BASED ON Ni(acac)_2, INTRODUCED LIGANDS-MODIFIERS HMPA, N-METHYLPIRROLIDONE-2, PhOH OR L-TYROSINE, AS EFFECTIVE CATALYSTS IN SELECTIVE ETHYLBENZENE OXIDATION WITH DIOXYGEN, AND AS MODELS OF Ni-ARD DIOXYGENASE

摘要

In this article we analysed the kinetics and mechanism of selective ethylbenzene oxidation with dioxygen catalysed by triple catalytic systems {Ni(acac)_2 + L~2 + PhOH} (L~2 = HMPA, MP (N-methyl-2-pyrolidone)). Using atomic force microscopy (AFM) method a possibility of formation of the stable supramolecular nanostructures, based on triple complexes {Ni(acac),-L~2PhOH} due to intermolecular H-bonds, was researched. For the first time with UV spectroscopy and AFM we have received confirmation the formation of triple complexes {Ni(acac)_2·MP Tyr} (Tyr = L-tyrosine) and stable supramolecular nanostructures based on {Ni(acac)_2·MP-Tyr}, which are models Ni-dioxygenase (Ni-ARD) - with the assistance of intermolecular H-bonds.