6533b858fe1ef96bd12b5660

RESEARCH PRODUCT

Porous Organic Polymers (POPs) based on cobalt corroles for the detection of carbon monoxide

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International audience; Detection of carbon monoxide (CO) at few ppm levels is a critical point for quality control of domestic and<br&gtindustrial environment. CO is responsible for thousands of intoxications and hundreds of deaths per year in the<br&gtworld. Moreover, CO is a residual gas found in the industrial dihydrogen used for Proton Exchange Membrane<br&gtfuel cell, and deactivates the fuel cell prematurely. Corroles have been largely used in sensing applications.[1]<br&gtCobalt corroles display high binding affinity for carbon monoxide even in the presence of nitrogen and<br&gtdioxygen.[2] The affinity of the Co(III) metallocorroles for CO is directly correlated with the Lewis acid character<br&gtof the metal center. Therefore, structural modifications on the aromatic ring have a direct influence on the<br&gtreactivity of the metal complex. We have recently obtained very low CO detection level (ppm) using SAW<br&gtdevices functionalized by cobalt corrole deposited as a film on an alumina or a gold surface.[3] Our previous work<br&gton the synthesis of porous sol-gel materials functionalized by cobalt corroles gave us encouraging results for CO<br&gtsorption and detection[4] and prompted us to prepare new porous structured materials functionalized by corrole<br&gtcomplexes for gas detection applications. Among all the methods of synthesis of porous architectures, organic<br&gtmaterials belonging to the POP (Porous Organic Polymer) family are an appealing and original approach in this<br&gtresearch field.[5] Herein, we describe the synthesis of new POPs functionalized by cobalt corroles (Fig. 1). Their<br&gtselective sorption properties for CO over N2, O2 and CO2 will be also presented.