Switchable dielectric materials are attracting tremendous interest due to their low cost of manufacture, environment protection and structural flexibility. However, most of them have a single function. Here, we report one switchable dielectric material, [4-ethylmorpholine]2MnCl4, with a high phase transition temperature of 425 K based on 4-ethylmorpholine. What is more interesting is that this compound also has photoluminescence characteristics. Owing to the excellent switchable dielectric transition and efficacious photoluminescence, this study may extend the application of switchable dielectric materials in the field of luminescence and multifunctional devices.
