Organic-inorganic hybrid halides (OIHs) have attracted widespread attention because of their exceptional optoelectronic properties. In particular, Mn²⁺-based hybrid halides show intense green or red emission, which benefit from distinct d-d optical transition in Mn²⁺. This work deals with the dual-emission in two novel hybrid single-crystals (N-AEP)[MnCl₃(H₂O)₃]₂·Cl (1) and [(N-AEP)₂MnCl₆]·2Cl (2) (N-AEP³⁺ = C₆H₁₈N₃³⁺). Luminescence properties studies indicate that the low-energy emission is assigned to the Mn²⁺-based octahedron, while the high-energy emission ascribes to the organic cation [N-AEP]³⁺. Inorganic polyhedron transformation ([MnCl₃(H₂O)₃]^- to [MnCl₆]^4-) increased the luminescent intensity, which benefited from the weaker nonradiative transition in [MnCl₆]^4- octahedron. Significantly, by finely adjusting the excitation wavelength, complex 2 showed tunable emission properties, realizing the transition from “warm” white light (0.40, 0.33) to “cold” white light (0.28, 0.28). This paper offers a new example on the effective design of dual-emission materials.

有机-无机杂化卤化物 (OIH) 因其优异的光电性能而受到广泛关注。特别是，基于 Mn ²⁺的杂化卤化物显示出强烈的绿色或红色发射，这得益于 Mn ²⁺中明显的 dd 光学跃迁。这项工作涉及两种新型杂化单晶 (N-AEP)[MnCl ₃ (H ₂ O) ₃ ] ₂ ·Cl ( 1 ) 和 [(N-AEP) ₂ MnCl ₆ ]·2Cl ( 2 ) (N-AEP ³⁺  = C ₆ H ₁₈ N ₃ ³⁺). 发光特性研究表明，低能发射归因于Mn ²⁺基八面体，而高能发射归因于有机阳离子[N-AEP] ³⁺。无机多面体转变（[MnCl ₃ (H ₂ O) ₃ ] ^-到[MnCl ₆ ] ^4-）增加了发光强度，这得益于[MnCl ₆ ] ^4-八面体中较弱的非辐射跃迁。值得注意的是，通过微调激发波长，复合物2显示出可调谐的发射特性，实现了从“暖”白光（0.40，0.33）到“冷”白光（0.28，0.28）的过渡。本文为双发射材料的有效设计提供了一个新的例子。