Reversible human-temperature-responsive luminescence switching in a Mn(ii)-based metal halide

Abstract

The flexibility afforded by their modular structure confers fruitful unique properties to organic–inorganic hybrid metal halides (OIMHs). Typically, stimuli-responsive materials have wide applications in thermal imaging, thermometry, and anti-counterfeiting. Herein, the Mn(II)-based OIMHs (TMS)₂MnBr₄ (TMS = trimethylsulfonium) were prepared through a facile dry ball-milled method. The obtained ball-milled powders show an intriguing phase transition along with emission switching. Importantly, photoluminescence (PL) switching can be realized by simply laying hands on the (TMS)₂MnBr₄ powders, highlighting their promising application potential in portable thermosensitive devices.