Dielectric/SHG/PL triple-channel properties in chiral spirocyclic organic–inorganic hybrids

Abstract

Chiral organic–inorganic hybrid materials with multi-channel switchable characteristics play an important role in the fields of sensors, intelligent switches, and information memorizers. The introduction of chiral organic amine into materials with photoluminescent properties is expected to achieve multi-channel switchable characteristics. Here, we report a pair of chiral organic–inorganic hybrids (R-HASD)₂MnBr₄ and (S-HASD)₂MnBr₄ (HASD = 2-hydroxy-5-azaspiro[4.5]decan) containing spirocyclic cations and having dielectric/second harmonic generation (SHG)/photoluminescence (PL) triple-channel switchable properties. Both compounds undergo a reversible plastic phase transition around 380 K. Under ultraviolet (UV) irradiation, both of them show intense green emission and their photoluminescence quantum yields (PLQYs) are above 70%. Therefore, multifunctional hybrid compounds with triple-channel dielectric/SHG/PL switches and excellent PL properties have been successfully prepared. This work is of great significance for further exploration of chiral multifunctional switchable materials.