Iodide-Centered Cuprous Octatomic Ring: A Luminescent Molecular Thermometer Exhibiting Dual-Emission Character

Luminescent molecular thermometers have attracted great attention due to their potential application for temperature detection in special environments. By a very simple one-step method, we have synthesized one novel cuprous compound, [I@Cu 8 (HMTZ)(MTZ) 7 ]·MeCN·2H 2 O ( I@Cu8 ), which consists of an infrequent octatomic [I@Cu 8 S 8 ] ring. Importantly, compound I@Cu8 features dual-emitting behavior and shows successive visual luminescent emissions varying from green, to yellow, to orange, and then to red in the temperature range of 80–300 K, suggesting potential application for a luminescent molecular thermometer.