Annie Powell

Prof. Dr. Annie Powell serves as Research Unit Chair for Cluster Chemistry at the Institute of Nanotechnology (INT) at Karlsruhe Institute of Technology (KIT) in Germany. She leads a prominent research group focused on synthesizing and characterizing molecular cluster compounds and framework structures of transition metals and rare earth elements for nanoscopic applications.

Her research spans five interconnected domains:

• Molecular Magnets: Development of Single Molecule Magnets (SMMs), including a record-breaking Mn₁₉ compound with S = 83/2 ground spin state, and pioneering work on 3d-4f systems where Dy(III) ions introduce crucial magnetic anisotropy
• MOFs and SMOFs: Creation of Super Metal Organic Frameworks using large coordination clusters as building units, including structures with Dy₃₆ and Y₇₉ rare earth clusters
• Biomimetics: Development of sophisticated models for biological systems, including a 4Mn/1Ca system representing the Oxygen Evolving Centre of Photosystem II
• Processing of Coordination Compounds: Transformation of coordination arrays into novel materials through thermolysis, yielding structures with potential battery applications
• Multifunctional Materials: Integration of multiple properties like porosity and magnetic ordering in single materials

Recent research has centered on butterfly-shaped 3d-4f clusters, where her group has demonstrated how ligand design, bridge rigidity, and crystal packing critically influence magnetic properties. Her work on photoexcited coordination compounds has revealed fundamental relationships between optical and magnetic properties, opening new possibilities for optomagnetic materials. A major contribution was the discovery of a Dy₃ triangle that serves as the archetype for Single Molecule Toroids (SMTs), significantly advancing 4f chemistry in molecular magnetism.

Professor Powell is recognized for her strong commitment to diversity in science, with her research group historically comprising members from varied religious, ethnic, and gender backgrounds. She is actively involved in the DFG-funded Collaborative Research Centre '4f for Future' which advances both scientific research and gender equality in this field. In October 2024, she will celebrate her 65th birthday with an international symposium dedicated to 4f chemistry and diversity in science.