Host(beta zeolite)–guest (copper(ii)–methyladenine complex) nanomaterials: synthesis and characterization

Abstract

The guest copper(II)–methyladenine complex was entrapped into beta zeolite (BEA) as a host by a process of sequential introduction of the components in the liquid phase followed by assembly inside the void space of the zeolite. The beta zeolite was prepared by an original technique. The appropriate process chosen for the in situ complex synthesis was using a 9-methyladenine ligand : copper(II) molar ratio of 4 : 1. The new host–guest nanomaterial was purified by Soxhlet extraction. The BEA zeolite with copper(II)–methyladenine complex was characterized by several techniques: SEM and XRD, chemical analysis (CA), spectroscopic methods (EPR, FTIR, UV-Vis and XPS) and TGA (thermal analysis). Analysis of the data indicates that the guest copper(II) complex was effectively immobilized in BEA without any modification of the morphology and structure of the zeolite. The coordination of the 9-methyladenine ligand with copper(II) ion as guest in the host nanomaterial was obtained with a preferential 1 : 1 stoichiometry.