Ionic Liquids−Cobalt(II) Thermochromic Complexes: How the Structure Tunability Affects “Self-Contained” Systems

Floriana Billeci, Francesca D'Anna, Natalia V. Plechkova, H. Q. Nimal Gunaratne, Kenneth R. Seddon, Floriana Billeci, Peter Licence

Risultato della ricerca: Articlepeer review


With the aim of obtaining thermochromic systems with potentialapplications in solar energy storage, we evaluated the behavior of some sugar-basedionic liquids (ILs)−Co(NTf2)2 complexes, in IL solution, as a function oftemperature. Different structural changes on the cation, the nature of the anion,and the nature of the IL used as the solvent were considered. The analysis of theabove factors was carried out through a combined approach of different techniques,that is, variable temperature UV−vis and NMR spectroscopies, conductivity, andthermal gravimetric analysis. The thermochromic systems were analyzed both assolutions and as thin films, and the data collected highlight the defining role playedby both the cation structure and the solvent nature in determining their performance.Most of the investigated systems show a chromogenic transition from pink to blue,occurring in a temperature range suitable for practical applications (40−60 °C).Interestingly, when embedded in a polymeric matrix, thin films with high recyclabilityand long life are also described.
Lingua originaleEnglish
pagine (da-a)4064-4075
Numero di pagine12
Stato di pubblicazionePublished - 2021

All Science Journal Classification (ASJC) codes

  • ???subjectarea.asjc.1600.1600???
  • Environmental Chemistry
  • ???subjectarea.asjc.1500.1500???
  • Renewable Energy, Sustainability and the Environment

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