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Abstract

A new polymer-supported chromium porphyrin has been prepared and fully characterised; its catalytic activity and recyclability were investigated for the ring-opening copolymerisation of 1,2-cyclohexene oxide (CHO) and carbon dioxide (CO2).

Discrete Metal‐Based Catalysts for the Copolymerization of CO2 and Epoxides: Discovery, Reactivity, Optimization, and Mechanism

“…[81,82] As with complexes 7 a and 7 b, the copolymerization only yielded polycarbonate when 8 was combined with a cocatalyst such as DMAP. [83] Jacobsen and co-workers found [(salen)CrCl] complexes to be highly active in the asymmetric ringopening of epoxides. Similar to aluminum-porphyrin catalysts for epoxide-CO 2 copolymerization, these chromium analogs yielded polycarbonates with narrow PDIs (M w /M n = 1.08-1.50) and low molecular weights (M n = 1500-9400 g mol À1 ).…”

Metal porphyrin/phenyltrimethylammonium tribromide: High efficient catalysts for coupling reaction of CO2 and epoxides

“…The cyclic carbonates are one of products of carbon dioxide fixation and widely used as organic synthetic intermediates, aprotic polar solvents, precursors for biomedical applications, and as raw materials for engineering plastics [7][8][9][10][11][12][13][14]. Various catalysts including alkali metal salts, Lewis acids, transition metal complexes, ionic liquids, and organometallic compounds, have been developed for these coupling reactions of CO 2 with epoxides to yield carbonates [15][16][17][18][19][20][21][22][23].…”

Synthesis and Processing of Organic Materials in Supercritical Carbon Dioxide

“…26 Since the first report of the Et 2 Zn-H 2 O-catalyzed (where Et is an ethyl group) polymerization of propylene oxide with CO 2 , 27 significant improvements have been made in the catalytic systems to enhance the efficiency of CO 2 and epoxide polymerizations. 28 Notably, copolymerization of cyclohexene oxide was achieved using a fully scCO 2 -soluble chromium porphyrin catalyst ( Figure 3a). 29 Recently, the copolymerization of CO 2 with propylene oxide has been reported using a (salen)Co(III) [where salen is N,N′-bis (3,5-…”