Garcia Espinosa, Luis D.; Williams-Pavlantos, Kayla; Turney, Keaton M.; Wesdemiotis, Chrys; Eagan, James M. published their research in ACS Macro Letters in 2021. The article was titled 《Degradable Polymer Structures from Carbon Dioxide and Butadiene》.Application In Synthesis of Tris(dibenzylideneacetone)dipalladium(0) The article contains the following contents:
The utilization of carbon dioxide as a polymer feedstock is an ongoing challenge. This report describes the catalytic conversion of carbon dioxide and an olefin comonomer, 1,3-butadiene, into a polymer structure that arises from divergent propagation mechanisms. Disubstituted unsaturated delta-valerolactone 1 (EVL) was homopolymerized by the bifunctional organocatalyst 1,5,7-triazabicyclo[4.4.0]dec-5-ene (TBD) to produce a hydrolytically degradable polymer. Isolation and characterization of reaction intermediates using 1H, 13C, COSY, HSQC, and MS techniques revealed a vinylogous 1,4-conjugate addition dimer forms in addition to polymeric materials. Polymer number-average mol. weights up to 3760 g/mol and glass transition temperatures in the range of 25 to 52°C were measured by GPC and DSC, resp. The polymer microstructure was characterized by 1H, 13C, FTIR, MALDI-TOF MS, and ESI tandem MS/MS. The olefin/CO2-derived materials depolymerized by hydrolysis at 80°C in 1 M NaOH. This method and the observed chem. structures expand the materials and properties that can be obtained from carbon dioxide and olefin feedstocks. In the experiment, the researchers used Tris(dibenzylideneacetone)dipalladium(0)(cas: 51364-51-3Application In Synthesis of Tris(dibenzylideneacetone)dipalladium(0))
Tris(dibenzylideneacetone)dipalladium(0)(cas: 51364-51-3) is the most widely used PdO precursor complex in synthesis and catalysis, in particular as a catalyst for various coupling reactions. Application In Synthesis of Tris(dibenzylideneacetone)dipalladium(0) It also used for palladium-catalyzed one-pot synthesis of tricyclic indolines, in the Suzuki-Miyaura coupling of 2-pyridyl nucleophiles and cross-coupling of aryl halides with aryl boronic acids.
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Metal catalyst and ligand design,
Ligand Template Strategies for Catalyst Encapsulation – NCBI