Abstract
Thermochromic luminescent compounds with d10 metal ions are interesting materials for applications such as sensors or display devices. However, these properties are difficult to predict prior to their synthesis. In this communication, we investigated materials with structural assemblies known to be responsible of distinct luminescence mechanisms and show that they can be interesting potential thermometers. Thus, we compared the synthesis of a zinc halide and a copper halide based compounds which only differ in their ability to create clusters with metallophilic interactions. The compounds synthesized by hydrothermal method have been structurally characterized by Single-crystal X-ray diffraction, Solid-State NMR, FTIR, UV-Visible spectroscopy, thermal analysis and EPR. The photoluminescence properties of the two materials have been characterized at different temperatures. The copper bromide compound shows luminescence thermochromism in a wide spectrum of colors owing to the formation of clusters generating multi-emission bands while the zinc bromide exhibits a single emission band and no thermochromism.
Highlights
Materials exhibiting a controlled photoluminescence as a response to temperature have great promise for applications as luminescent thermometers[1,2,3,4,5,6]
Compounds with d10 metals can exhibit luminescence which can be either of ligand centered, charge transfer or metal-centered nature
We show that one strategy is to focus on compounds in which several photoluminescence bands have different origins
Summary
Materials and Multi-Emission Bands in d10 Clusters received: 17 November 2016 accepted: 01 March 2017 Published: 30 March 2017. As the thermochromic behaviour of luminescence can be of different origins, a rational design of materials exhibiting such properties is difficult In this communication, we show that one strategy is to focus on compounds in which several photoluminescence bands have different origins. It results that the mixing of the emission bands and, the resulting colour of the photoluminescence will change gradually with temperature This thermochromic behaviour of the photoluminescence will be more common in the materials for which distinct mechanisms of the photoluminescence are considered. The copper halide material built from polynuclear assemblies exhibits multi-emission bands that evolve differently with temperature. It results a thermochromic photoluminescence from 77 K to room temperature in a wide spectrum of colors
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
