Two Manganese(II)-Based Hybrid Multifunctional Phase Transition Materials with Strong Photoluminescence, High Quantum Yield, and Switchable Dielectric Properties: (C<sub>6</sub>NH<sub>16</sub>)<sub>2</sub>MnBr<sub>4</sub> and (C<sub>7</sub>NH<sub>18</sub>)<sub>2</sub>MnBr<sub>4</sub>
Hao Zhang, Yu‐Hui Tan, Yun‐Zhi Tang, Xiao‐Wei Fan, Xin‐Lin Peng, Rui‐Rui Han, Yu-Kong Li, Fang‐Xin Wang
Abstract
Multifunctional materials have always been an attractive research area, but how to combine multiple excellent properties in one compound remains a considerable challenge. Organic–inorganic hybrid compounds are widely used in the design of such materials due to their rich properties and flexible assembly. Herein, two new manganese(II)-based organic–inorganic hybrid compounds, (C6NH16)2MnBr4 (1) and (C7NH18)2MnBr4 (2), are prepared by the solution method. Compounds 1 and 2 both emit extremely strong green light under UV excitation, with high quantum yields of 45.93 and 50.98%, respectively. In addition, reversible solid-state phase transitions and obvious switchable dielectric properties are shown at 378/366 and 361/352 K, respectively. The coexistence of the dual stimulus–response characteristics of temperature and light in compounds 1 and 2 opens a new path for exploring more multifunctional phase transition materials.