Stoichiometric Studies on the Carbonylative Trifluoromethylation of Aryl Pd(II) Complexes using TMSCF3 as the Trifluoromethyl Source

K Domino, MB Johansen, K Daasbjerg, T Skrydstrup https://doi.org/10.1021/acs.organomet.9b00849 We have performed a series of stoichiometric studies in order to identify viable steps for a hypothetical catalytic cycle for the palladium-mediated carbonylative coupling of an aryl bromide with TMSCF3. Our work revealed that benzoyl Pd(II) complexes bearing Xantphos or tBu3P as the phosphine ligands, which are…

Ligand-Controlled Product Selectivity in Electrochemical Carbon Dioxide Reduction Using Manganese Bipyridine Catalysts

Magnus H Rønne, Dasol Cho, Monica R Madsen, Joakim B Jakobsen, Seunghwan Eom, Émile Escoudé, Hans Christian D Hammershøj, Dennis U Nielsen, Steen U Pedersen, Mu-Hyun Baik, Troels Skrydstrup, Kim Daasbjerg https://doi.org/10.1021/jacs.9b11806 Electrocatalysis is a promising tool for utilizing carbon dioxide as a feedstock in the chemical industry. However, controlling the selectivity for different CO2 reduction…

Understanding the Enhanced Catalytic CO2 Reduction upon Adhering Cobalt Porphyrin to Carbon Nanotubes and the Inverse Loading Effect

Xiaoyu Chen, Xin-Ming Hu, Kim Daasbjerg, Mårten SG Ahlquist https://doi.org/10.1021/acs.organomet.9b00726 Adhering a cobalt porphyrin (Co(TPP)) catalyst on a carbon nanotube (CNT) supporting material greatly enhances its reactivity and enables catalysis in water, which is otherwise impossible. However, the effect of solvent as well as supporting materials on catalysis is still elusive. On the basis of…

Stimuli-responsive degrafting of polymer brushes via addressable catecholato-metal attachments

Asger Holm Agergaard, Steen Uttrup Pedersen, Henrik Birkedal, Kim Daasbjerg 10.1039/d0py00916d Catecholato-metal complexes are widely used in functional materials such as hydrogels, where the dynamic nature of the coordination bonds between catechol and metal ions contributes to self-healing and stimuli-responsive properties. Herein, we translate the pH-controlled speciation of such complexes known from bulk to a…

Synthesis and Closed-Loop Recycling of Self-Immolative Poly (dithiothreitol)

Andreas Sommerfeldt, Kim Daasbjerg, Steen Uttrup Pedersen, Sunirmal Pal https://doi.org/10.1021/acs.macromol.0c00861 Self-immolative polymers (SIPs) are promising members of the emerging class of recyclable polymers with the ability to end-to-end depolymerize to their monomers. Unfortunately, SIPs are often synthesized by cumbersome procedures at low temperatures in protected atmosphere. In this study, a SIP with a novel poly(disulfide)…