A magnetic self-contained thermochromic system with convenient temperature range

Floriana Billeci, H. Q. Gunaratne, Francesca D'Anna, Grace Morgan, Kenneth R. Seddon, Natalia Plechkova

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)
123 Downloads (Pure)


A new ionic liquid with sugar-based ligand has been prepared and used to coordinate cobalt(II), at low loading, in an ionic liquid solution. The system obtained reveals magnetic switching and marked thermochromism in solution/polymer films over a convenient temperature range (20–60 °C). This system is self-contained, devoid of any volatile substances, and reproducible over multiple thermal cycles. The colour change can be attributed to a change in the coordination geometry from octahedral (pink) at room temperature to tetrahedral (blue) on warming, monitored by 59Co NMR spectroscopy, which was used for the first time to study the change. This material may find applications in stimuli-responsive smart systems aimed at energy storage applications.
Original languageEnglish
Pages (from-to)1412-1416
Number of pages5
JournalGreen Chemistry
Issue number6
Early online date25 Feb 2019
Publication statusPublished - 2019


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