Irreversible thermochromism in copper chloride Imidazolium Nanoparticle Networks

Author(s)

Martin Kronstein, Konstantin Kriechbaum, Johanna Akbarzadeh, Herwig Peterlik, Marie-Alexandra Neouze

Abstract

In this work Imidazolium Nanoparticle Networks (INNs) with chloride counter-ions were used to complex copper dichloride. This complexation reaction leads to the formation of a green material. The properties of the copper INN material were compared to: first, copper imidazolium complexes, without the presence of silica nanoparticles, which are not thermochromic; second, chloride-containing INN material. The copper INN material showed irreversible thermochromic behaviour, with a clear colour change from green to yellow at 180 °C, which is due to a configuration change of the copper complex from planar to tetragonal. This structural change was studied using DSC and in situ SAXS measurements during heat treatment. The thermochromic material is stable under air up to 250 °C. This preliminary study opens the door of optical sensors for INN materials.

Organisation(s)

Dynamics of Condensed Systems

External organisation(s)

Technische Universität Wien, French Alternative Energies and Atomic Energy Commission (CEA)

Journal

Physical Chemistry Chemical Physics

Volume

15

Pages

12717-12723

No. of pages

7

ISSN

1463-9076

DOI

https://doi.org/10.1039/c3cp50430a

Publication date

2013

Peer reviewed

Yes

Austrian Fields of Science 2012

103015 Condensed matter, 104011 Materials chemistry

Keywords

Portal url

https://ucris.univie.ac.at/portal/en/publications/irreversible-thermochromism-in-copper-chloride-imidazolium-nanoparticle-networks(5e89fcc4-45cc-45fc-b772-e17af1134725).html