Conversion of CO2 into Chloropropene Carbonate Catalyzed by Iron (II) Phthalocyanine Hypercrosslinked Porous Organic Polymer

• Published in: Molecules (Basel, Switzerland) Vol. 25; no. 20; p. 4598
• Main Authors: Maya, Eva M., Valverde-González, Antonio, Iglesias, Marta
• Format: Journal Article
• Language: English
• Published: Basel MDPI AG 09.10.2020; MDPI
• Subjects: Carbon dioxide; Catalysts; CO2 conversion; Conversion; cyclic carbonate; Cycloaddition; Epichlorohydrin; Friedel-Crafts reaction; Iron; iron (II) phthalocyaninates; knitted porous polymer; Leaching; Metal phthalocyanines; Polymers; Pyridines; recyclability; Solvents
• ISSN: 1420-3049; 1420-3049
• DOI: 10.3390/molecules25204598

Commercial iron (II) phthalocyanine (FePc) was knitted with biphenyl using a Friedel–Crafts reaction to yield a micro-meso porous organic polymer (FePc-POP) with a specific surface area of 427 m2/g and 5.42% of iron loading. This strategy allowed for the direct synthesis of a heterogeneous catalyst from an iron containing monomer. The catalytic system, formed by the knitted polymer containing FePc and DMAP (4-dimethylamino pyridine) as base, results in an efficient heterogeneous catalyst in the cycloaddition of CO2 to epichlorohydrin to selectively obtain the corresponding cyclic carbonate. Thus, a TON (mmol substrate converted/mmol catalysts used) value of 2700 was reached in 3 h under mild reaction conditions (solvent free, 90 °C, 3 bar of CO2). The catalyst does not exhibit leaching during the reactions, which was attributed to the excellent stability of the metal in the macrocycle.