Low melting spin crossover compounds (SCOILs) and SCO-glasses

• Applicant: Dr. Julia Klingele
• Subject Area: Inorganic Molecular Chemistry - Synthesis and Characterisation
• Term: from 2013 to 2016
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 235134268

This project is dedicated to the synthesis of two new compound classes, namely Spin Crossover Ionic Liquids (SCOIL) and Spin Crossover Glasses (SCO-Glasses).These new classes exhibit features typical for Spin Crossover compounds as well as characteristics of Ionic Liquids or glasses. As they are Spin Crossover compounds the magnetic and physical properties can be altered via change in temperature or pressure or via light application. As they are Ionic liquids additionally, they exhibit low vapour pressure, high thermal and electrochemical stability, as well as ionic conductivity, exceptional solubility for organic and inorganic compounds. Also those classes should feature unique properties like the possibility to alter density, viscosity and condition of aggregation, when triggering the Spin Crossover.For all this reasons these new compounds are attractive targets for sensor, solar energy and magnetic application technology, etc. The new proposed compound classes also will be a valuable tool for the Spin Crossover research. As Spin Crossover properties are highly dependent on cooperative interactions between Spin Crossover molecules, in this context SCOILs and SCO-Glasses are in-between the commonly examined extremes, namely the crystalline solid compound and the dilute solution. Studies on liquid Spin Crossover compounds or Spin Crossover glasses are yet unknown. Surely Spin Crossover molecules in the melt or glass will experience weaker and not as directional interactions as in the crystalline solid but still those interactions will be much stronger than those of molecules in a dilute solution.Therefore these new compound classes offer the possibility of answering fundamental questions in Spin Crossover research as well as diverse applications in industry and technology.

• DFG Programme: Research Grants