Ceramic methyltrioxorhenium

The metal oxide polymeric methyltrioxorhenium [(CH3)xReO3]∞ is a unique representative of a layered inherent-conducting organometallic polymer which adopts the structural motifs of classical perovskites in two dimensions (2D) in form of methyl-deficient, corner-sharing ReO5(CH3) octahedra. In order to improve the characteristics of polymeric methyltrioxorhenium with respect to its physical properties and potential usage as an inherent-conducting polymer we tried to optimise the synthetic routes of polymeric modifications of 1 to obtain a sintered ceramic material, denoted as ceramic MTO. Ceramic MTO formed in a solvent-free synthesis via auto-polymerisation and subsequent sintering processing displays clearly different mechanical and physical properties from polymeric MTO synthesised in aqueous solution. Ceramic MTO is shown to display activated ReC and ReO bonds relative to MTO. These electronic and structural characteristics of ceramic MTO are also reflected by a different chemical reactivity compared with its monomeric parent compound. First examples of the unprecedented reactivity of ceramic MTO in the field of amine oxidations are shown – results which warrant further exploitation.

The metal oxide polymeric methyltrioxorhenium [(CH3)xReO3]∞ (poly-MTO) is a unique representative of an inherent-conducting organometallic polymer. To improve its physical and mechanical characteristics to we propose a solvent-free synthesis of poly-MTO leading a sintered ceramic material, denoted as ceramic MTO.Figure optionsDownload as PowerPoint slide