Department of Chemistry

Department of Chemistry University of Oxford

New work in Angewandte Chemie

New work in Angewandte Chemie

A new paper by DFG Fellow Dr Bertold Rasche and researchers from the Compton and Clarke groups in cooperation with the DIAMOND synchrotron has been published as a VIP Communication in Angewandte Chemie. The paper reports the precise, post-synthetic electrochemical control of the composition of an iron-based superconductor, with simultaneous tracking of the crystal structure by means of in-situ synchrotron X-ray diffraction. While the superconductivity is shown to be independent of the compositional changes in contrast to earlier reports, further in-situ experiments reveal how minor traces of oxygen destroy the superconducting properties. The latter process can be reversed electrochemically. The work demonstrates the exquisite control afforded by electrochemistry in comparison to classical approaches to chemical synthesis. more........