Irreversible thermochromism in copper chloride Imidazolium Nanoparticle Networks

Autor:	Marie-Alexandra Neouze, Herwig Peterlik, Martin Kronstein, Konstantin Kriechbaum, Johanna Akbarzadeh
Rok vydání:	2013
Předmět:	Thermochromism Materials science Small-angle X-ray scattering Inorganic chemistry General Physics and Astronomy chemistry.chemical_element Nanoparticle Copper Chloride Tetragonal crystal system chemistry Structural change medicine Physical and Theoretical Chemistry Copper chloride medicine.drug
Zdroj:	Physical Chemistry Chemical Physics. 15:12717
ISSN:	1463-9084 1463-9076
DOI:	10.1039/c3cp50430a
Popis:	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.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ccb8627558bac4b9cea9b708fb0f6911 https://doi.org/10.1039/c3cp50430a Zobrazit plný text záznamu