New Extra Large Pore Chromium Oxophenylphosphate: An Efficient Catalyst in Liquid Phase Partial Oxidation Reactions

Abstract

Abstract:A new supermicroporous chromium oxophenylphosphate (CPP-1) has been synthesized using phenylphosphonic acid (PPA) as phosphorus source under hydrothermal condition at 443 K without using any structuredirecting agent (SDA). The material has been characterized by powder XRD, FE SEM-EDS, TEM, TG-DTA, N 2 sorption, XPS, FT IR, UV-Vis spectroscopic techniques and CHN chemical analysis. CPP-1 showed specific surface area of 313 m 2 g -1 with extra large supermicropores having dimension of ca. 1.4 nm. TEM result suggested lamellar type pore-wall structure for this material. It exhibited good catalytic property in partial oxidation of olefins in presence of tertbutylhydroperoxide (TBHP) as oxidant.

Organic–inorganic hybrid supermicroporous chromium oxophenylphosphate with magnetic and catalytic properties

“…The two prominent peaks at ca. 1.4 and 3.75 nm signify the existence of both supermicroporosity and interparticle porosity, respectively in the material [31]. Moreover FT IR spectra of both the samples (CPP-1 and CPP-1R) are identical (Fig.…”

“…However, these phosphate-based catalysts suffer from several drawbacks in large-scale industrial applications due to low specific surface areas and physical-chemical properties [30]. The presence of porosity in a phosphonate based material enhances its internal surface area and thus their application potential as a catalyst [31]. Microporous and mesoporous materials have attracted large scale interest in this context owing to their wide range of applications in many frontline areas of research like gas storage, catalysis, ion-exchange, sensing, magnetism, electrical, electronics, optics etc.…”

“…Very recently we have reported a template-free synthesis of organic-inorganic hybrid supermicroporous metal oxophenylphosphate [30,31]. The synthesis procedure of chromium oxophenylphosphate is simple, convenient and the material is stable up to 660 K. Further, magnetic susceptibility measurements of Cr-based nanomaterials possessing nanoscale porosity may provide useful insights on the coupling between the neighboring metal centers and its potential magnetic application.…”