Agnes E Thorarinsdottir

Big day for my group yesterday when my first graduate student, Daniela Carmona-Pérez, passed her candidacy exam with flying colors! 🎉 Stay tuned for her next paper! (coming soon)

Best Practices for Variable-Temperature Electrochemistry Experiments and Data Reporting OR SEARCH CITATIONS

Check out our Viewpoint article in ACS Energy Letters on variable-temperature electrochemistry🔌⚡🌡️ pubs.acs.org/doi/10.1021/...

Effect of Coordination Environment and Electronic Coupling on Redox Entropy in a Family of Dinuclear Complexes The elucidation of factors that govern the temperature sensitivity of the electrochemical potential is essential to the development of electrochemical systems with target properties. Toward this end, we report a series of isostructural homo- and heterometallic M2 (M = FeII, FeIII, ZnII) complexes supported by a phenoxo-centered tetrapyridyl ligand and ancillary carboxylate ligands that enables independent change in (i) charge, (ii) coordination environment of the redox-active center(s), and (iii) electronic coupling strength between redox centers. Variable-temperature electrochemical analysis of the series reveals the temperature coefficient for Fe-based redox couples to be highly dependent on the coordination environment of the redox-active center(s), with Fe centers in a pseudo-octahedral [FeN3O3] coordination environment affording a 2-fold greater temperature coefficient for the FeIII/FeII redox couple than those in ancillary ferrocenyl groups. In contrast, identical temperature coefficients for the FeIII/FeII redox event in Fe2 and FeZn complexes establish electronic coupling strength to have a minimal impact on the temperature dependence of the Fe-based redox couple. Taken together, these results provide important insights for the design of molecular compounds with target redox properties, and they provide the first examination of how electronic coupling influences the temperature dependence of the redox potential and the associated redox entropy in molecular compounds.

I am thrilled to share this paper from my group that is just out in ACS Electrochemistry. We study factors that impact the temperature sensitivity of redox potentials in iron complexes. You can read about it here (it is open access): pubs.acs.org/doi/10.1021/...

Implications of Charge and Heteroatom Dopants on the Thermodynamics and Kinetics of Redox Reactions in Keggin-Type Polyoxometalates The utilization of polyoxometalate-based materials is largely dictated by their redox properties. Detailed understanding of the thermodynamic and kinetic efficiency of charge transfer is therefore ess...

We had a blast collaborating with @matsonlab.bsky.social Check out our paper in ACS Materials Au pubs.acs.org/doi/10.1021/... Special shout out to the amazing Mamta Dagar!!!