Microporous Polymelamine Framework Functionalized with Re(I) Tricarbonyl Complexes for CO2 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 CO2 absorption. The gas absorption amount measured at 295 K was close to 44 cm(3)/g at 1 atm. An interesting catalytic activity for CO2 reduction reaction (CO2RR) 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.

Automated summary

The polymeric complexes based on the reaction between Re(CO)(5)Cl and melamine and benzene-1,3,5-tricarboxaldehyde showed a noticeable capability of CO2 absorption and interesting catalytic activity for CO2 reduction reaction.