Encapsulation of Cu(II) Purine Derivative Complexes in NaY Zeolite

Abstract

The encapsulation of Cu(II) purine derivative complex was carried out by ion exchange of the complex from aqueous solutions into zeolite NaY. The entrapped complex was characterized by spectroscopic methods (FTIR and ICP-AES) and surface analysis (XRD). The various techniques of characterization used show that the Cu(II) complex was effectively encapsulated in the zeolite and this process does not modify the morphology and structure of the NaY zeolite. These materials have potential applications in heterogeneous catalysis in mild reaction conditions.

Copper(II)–Purine Complexes Encapsulated in NaY Zeolite

“…The decomposition of solid samples was carried out by alkaline fusion; the method involves the use of lithium metaborate as the fluxing agent, which grants thermal stabilization of elements during the fusion stage at 1050°C. [15] Chemical analysis of C, H and N were carried out with a Leco CHNS-932 analyzer. X-ray photoelectron spectroscopy analyses were obtained at the C. A. C. T. I.…”

“…Thus, Cu IIpurine complexes can be ion-exchanged and encapsulated into the zeolite cavities. [15] In earlier studies, we showed that the methodologies used for the encapsulation/immobilization of the metal complexes in zeolites [16] and clays [17] are largely determined by the supports.…”

Influence of Zeolite Framework on the Structure, Properties, and Reactivity of Cobalt Phenanthroline Complex: A Combined Experimental and Computational Study

“…Over the past decade, the encapsulation of transition metal coordination complexes and organometallics within the voids of microporus zeolite has attracted attention, since it provides a simple way of coupling the reactivity of the metal complex with the robustness and stereochemistry of the host zeolite. − Rapid progress is being made in developing encapsulated base catalysts, as they are found to have wide applications in heterogeneous and homogeneous catalytic processes. − In addition to the application of these hybrid materials in catalytic reactions, they are now being well studied to mimic the biosystem. Metal complexes encapsulated in zeolites can mimic metalloenzymes and therefore they are being termed as zeozymes. − Recently, hydroxo bridged dinuclear cupric complexes of phenanthroline encapsulated in various mesoporous silicas were reported to mimic the catalytic activity of catechol oxidases …”