Mode I debonding under large deformation conditions including notes on cleavage-peeling transition

Heide-Jørgensen, S., Budzik, M. K., Buhl, K. B., Hinge, M., Pedersen, S. U., Daasbjerg, K. & Kongsfelt, M. https://doi.org/10.1016/j.engfracmech.2020.107413 Peeling and cleavage are common load cases for studying and evaluating adhesion between materials. The former is suitable for testing adhesion of thin or highly flexible materials for which the bending energy is negligible while the latter…

Main element chemistry enables gas-cylinder-free hydroformylations

Pedersen, S. K., Gudmundsson, H. G., Nielsen, D. U., Donslund, B. S., Hammershøj, H. C. D., Daasbjerg, K. & Skrydstrup, T. https://doi.org/10.1038/s41929-020-00510-z Industrially, aldehydes are produced annually on a multimillion-tonne scale via the hydroformylation of olefins with syngas (CO/H2 mixture). Nonetheless, this transformation has not found frequent use in the laboratory. Here we report on a simple…

Evaluation of Surface-initiated Polymer brush as Anti-scaling Coating for Plate Heat Exchangers

Jakob Ege Friis, Guruprakash Subbiahdoss, Gorm Gerved, Allan Hjarbæk Holm, Olga Santos, Anders Bank Blichfeld, Saeed Zajforoushan Moghaddam, Esben Thormann, Kim Daasbjerg, Joseph Iruthayaraj, Rikke Louise Meyer https://doi.org/10.1016/j.porgcoat.2019.06.042 Inorganic fouling is one of the challenging problems in heat exchanger applications. One approach to mitigate fouling is to employ surface coatings. In this study, we evaluated…

Two-phase bipolar electrografting

Monica Rohde Madsen, Line Koefoed, Henrik Jensen, Kim Daasbjerg, Steen U Pedersen https://doi.org/10.1016/j.electacta.2019.04.186 Bipolar electrochemistry is a wireless technique by which surface modifications at the extremities of a conducting object can be accomplished. In this study a new methodology for doing simultaneous electrografting of two different organic films at each end of a gold substrate…

Access to β‐Ketonitriles through Nickel‐Catalyzed Carbonylative Coupling of α‐Bromonitriles with Alkylzinc Reagents

Aske S Donslund, Karoline T Neumann, Nicklas P Corneliussen, Ebbe K Grove, Domenique Herbstritt, Kim Daasbjerg, Troels Skrydstrup https://doi.org/10.1002/chem.201902206 Herein, we report a nickel‐catalyzed carbonylative coupling of α‐bromonitriles and alkylzinc reagents with near stoichiometric carbon monoxide to give β‐ketonitriles in good yields. The reaction is catalyzed by a readily available and stable nickel(II) pincer complex.…

Carbon isotope labeling strategy for β-amino acid derivatives via carbonylation of azanickellacycles

Anne K Ravn, Maria BT Vilstrup, Peter Noerby, Dennis U Nielsen, Kim Daasbjerg, Troels Skrydstrup https://doi.org/10.1021/jacs.9b05934 A series of 4-membered azametallacycles have been prepared by the oxidative addition of Ni(0) with aziridines. Stoichiometric 13C-labeled carbon monoxide could be efficiently incorporated via Ni–C bond insertion to generate air stable and isolable cyclic Ni-acyl complexes. Upon subjection to…

Hydrosilane-Modified Poly (2-Hydroxyethyl Methacrylate) Brush as a Nanoadhesive for Efficient Silicone Bonding

Stefan Urth Nielsen, Mark Holm Olsen, Mikkel Skorkjær Kongsfelt, Steen Uttrup Pedersen, Kim Daasbjerg https://doi.org/10.1021/acsomega.9b01282 Leaching of chemicals from adhesion promoters is, in particular, problematic for the food, water, pharmaceutical, and MedTech industries where any chemical contamination is unacceptable. A solution to this issue is to employ covalently attached nanoscale polymer brushes as adhesive layers…

Supported molecular catalysts for the heterogeneous CO2 electroreduction

Xin-Ming Hu, Steen U Pedersen, Kim Daasbjerg https://doi.org/10.1016/j.coelec.2019.05.006 The thorough understanding of homogeneous catalysis has triggered intense research activities on the immobilization of molecular catalysts for the heterogeneous CO2 electroreduction. Herein, we discuss recent advances in the heterogeneous field with focus on the intrinsic effect coming from the catalyst structure and the extrinsic effect exerted by…