2017
DOI: 10.1039/c7dt02841e
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Synthesis and characterization of trimetallic cobalt, zinc and nickel complexes containing amine-bis(benzotriazole phenolate) ligands: efficient catalysts for coupling of carbon dioxide with epoxides

Abstract: New trimetallic cobalt, nickel and zinc complexes 1-3 coordinated by amine-bis(benzotriazole phenolate) ligands and ancillary acetate groups have been developed for the use of CO/epoxide coupling. All complexes were structurally characterized by single crystal X-ray crystallography; tri-Co complex 1 is the first solid-state example in which three different geometrical configurations exist in the same benzotriazole phenoxide metal complex. Tri-nuclear complexes 1 and 2 with cobalt and zinc metal centers were de… Show more

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Cited by 38 publications
(26 citation statements)
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“…We report herein the preparation of a variety of Zn complexes bearing CAP ligands and their applications in L ‐lactide ( L ‐LA) polymerization. In addition, many Zn complexes have shown good activity in the reaction of CO 2 and epoxide . Therefore, the reaction of CO 2 with epoxide catalyzed by these zinc complexes is also presented.…”
Section: Introductionmentioning
confidence: 99%
“…We report herein the preparation of a variety of Zn complexes bearing CAP ligands and their applications in L ‐lactide ( L ‐LA) polymerization. In addition, many Zn complexes have shown good activity in the reaction of CO 2 and epoxide . Therefore, the reaction of CO 2 with epoxide catalyzed by these zinc complexes is also presented.…”
Section: Introductionmentioning
confidence: 99%
“…The starting reaction conditions were selected in view of the reported [ 35 ] cycloaddition reaction to cyclohexene oxide substrate. Then, the reaction parameters (e.g., time, temperature, CO 2 pressure, IL to substrate ratio) were optimized (see experimental section) but the obtained carbonate yields under such conditions (epoxide (5 mmol), [ t Bu 4 N]Br (0.3%mol vs. epoxide), IL (8.3–18.8 mol), CO 2 (8 bar), 24 h, 80 °C) were very low (up to 5%, for [bmim][N(CN) 2 ]), even in the presence of promoting [Bu 4 N]Br [ 36 , 37 ] (which apparently requires higher temperatures and CO 2 pressures to operate as a catalyst).…”
Section: Resultsmentioning
confidence: 99%
“…The Ko group has proposed a series of multinuclear metal catalysts, for instance, di-nickel (Lin et al, 2016;Tsai et al, 2016;Huang et al, 2017;Li et al, 2019b;Su et al, 2020a,b), di-zinc (Chang et al, 2016), di-cobalt (Su et al, 2019b), and bi-yttrium (Su et al, 2019a), using amine bis(benzotriazole phenolate) and its derivatives as the ligand, for the ROCOP of epoxides with CO 2 or cyclic anhydrides (Su et al, 2014;Chuang and Ko, 2015;Yu et al, 2016;Li et al, 2017a;Chang et al, 2018). In 2016, the Ko group reported the heat-resistant metal catalysts, bearing multidentate diaminebis(benzotriazole phenolate) (DiBTP) derivatives (Figure 6, cat.…”
Section: Catalyst Systems Homodinuclear Catalystsmentioning
confidence: 99%
“…Compared with petroleum derivative monomers, bio-based monomers usually have more functional groups, and it is difficult to achieve highly selective polymerization through traditional polymerization methods (Stadler et al, 2019). For ring-opening copolymerization (ROCOP) of epoxide with CO 2 or cyclic anhydrides, many efficient metal-based catalysts have been developed to produce alternating polycarbonates or polyesters (Paul et al, 2015b;Longo et al, 2016;Xia and Zhao, 2018;Liang et al, 2021), including zinc (Deacy et al, 2018(Deacy et al, , 2020aDenk et al, 2020), cobalt (Li et al, 2017a;Ambrose et al, 2019), aluminum (Sanford et al, 2018), or nickel (Huang et al, 2017;Li et al, 2017a) complexes with different ligands. These organometallic catalysts exhibit excellent catalytic SCHEME 1 | Ring-opening copolymerization of epoxides with CO 2 and cyclic anhydrides and post-polymerization modification for biomedical applications.…”
Section: Introductionmentioning
confidence: 99%