title: Facile in situ synthesis of nanofluids based on ionic liquids and copper oxide clusters and nanoparticles.
abstract: Two stable nanofluids comprising of mixed valent copper(I,II) oxide clusters (<1 nm) suspended in 1-butyl-3-methylimidazolium acetate, [C(4)mim][OAc], and copper(II) oxide nanoparticles (<50 nm) suspended in trioctyl(dodecyl)phosphonium acetate, [P(8 8 8 12)][OAc], were synthesised in a facile one-pot reaction from solutions of copper(II) acetate hydrate in the corresponding ionic liquids. Formation of the nanostructures was studied using (13)C NMR spectroscopy and differential scanning calorimetry (DSC). From a solution of Cu(OAc)(2) in 1-ethyl-3-methylimidazolium acetate, [C(2)mim][OAc], crystals were obtained that revealed the structure of [C(2)mim][Cu(3)(OAc)(5)(OH)(2)(H(2)O)]·H(2)O, indicating the formation of copper hydroxo-clusters in the course of the reaction. Synthesised nanostructures were studied using transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy (XPS). Physical properties of the prepared IL-nanofluids were examined using IR and UV-VIS spectroscopy, thermogravimetric analysis (TGA), differential scanning calorimetry (DSC) and densitometry.
authors.affiliation: QUILL/School of Chemistry and Chemical Engineering, The Queen's University of Belfast, Belfast, BT9 5AG, United Kingdom. m.swadzba-kwasny@qub.ac.uk
authors.forename: Małgorzata
authors.initials: M
authors.lastname: Swadźba-Kwaśny
authors.forename: Léa
authors.initials: L
authors.lastname: Chancelier
authors.forename: Shieling
authors.initials: S
authors.lastname: Ng
authors.forename: Haresh G
authors.initials: HG
authors.lastname: Manyar
authors.forename: Christopher
authors.initials: C
authors.lastname: Hardacre
authors.forename: Peter
authors.initials: P
authors.lastname: Nockemann