Microporous Polymelamine Framework Functionalized with Re(I) Tricarbonyl Complexes for CO 2 Absorption and Reduction.

A mixture of polymeric complexes based on the reaction between Re(CO) 5 Cl and the porous polymeric network coming from the coupling of melamine and benzene-1,3,5-tricarboxaldehyde was obtained and characterized by FTIR, NMR, SEM, XPS, ICP, XRD, and cyclic voltammetry (CV). The formed rhenium-based porous hybrid material reveals a noticeable capability of CO 2 absorption. The gas absorption amount measured at 295 K was close to 44 cm 3 /g at 1 atm. An interesting catalytic activity for CO 2 reduction reaction (CO 2 RR) is observed, resulting in a turn over-number (TON) close to 6.3 under 80 min of test at -1.8 V vs. Ag/AgCl in a TBAPF 6 0.1 M ACN solution. A possible use as filler in membranes or columns can be envisaged.