Synthesis of 1D Polymer/Zeolite Nanocomposites under High Pressure
At a Glance
Section titled âAt a Glanceâ| Metadata | Details |
|---|---|
| Publication Date | 2016-05-23 |
| Journal | Chemistry of Materials |
| Authors | Mario Santoro, Demetrio Scelta, Kamil F. Dziubek, Matteo Ceppatelli, Federico A. Gorelli |
| Institutions | Institut Européen des Membranes, Centre National de la Recherche Scientifique |
| Citations | 37 |
Abstract
Section titled âAbstractâRecently, simple carbon based polymers have been \nsynthesized at high pressures in silicalite, a pure SiO2 zeolite with a 3D \nsystem of mutually interconnected microchannels. These protocols \npermitted otherwise unstable polymers to be stabilized and protected \nfrom the atmosphere and to obtain an entirely novel class of \nnanocomposites with modified physical properties. In these 3-D \nsystems, channel interconnection may prevent ideal, isolated polymer \nchains to be obtained. In this work, the high pressure (5â10 GPa) \nsynthesis of two archetypal, linear polymers polyacetylene (PA) and \npolycarbonyl (pCO) in the 1D channel system of the pure SiO2 zeolite \nZSM-22 (TON) has been performed. The two resulting nanocomposites \nPA/TON and pCO/TON are organic/inorganic composite \nmaterials, which are good candidates as highly directional semiconductors \nand high energy density materials, respectively. The synthesis was performed in diamond anvil cells, starting from \ndense C2H2 and CO, confined in ZSM-22, and the nanocomposites were recovered at ambient conditions. The monomer \npolymerization was proven by IR spectroscopy and synchrotron X-ray diffraction measurements. DFT calculations were \nperformed in order to obtain insight about the configurations of the 1D embedded polymers.