Two low-dimensional metal halides: ionothermal synthesis, photoluminescence, and nonlinear optical properties

Abstract

Two new organic–inorganic hybrid metal halides, formulated as (C₇H₁₃N₂)₂MnCl₄ (1) and (C₆H₁₁N₂)PbBr₃ (2), were prepared by a two-component ionothermal approach using multifunctional ionic liquids as solvents, charge-balancing agents, and halide sources. Compound 1 has an ionic zero-dimensional structure showing bright green luminescence with a high quantum yield of up to 70.78%. Compound 2 has a chain-like structure with a large second harmonic generation efficiency which is approximately 8× that of KH₂PO₄.