The family of Mn-based organic–inorganic hybrids has greatly expanded due to their advantages in applications. They also show superior bright and size-tunable photoluminescence and can be considered a perfect alternative to toxic lead-based compounds. In this work, we present the detailed structural, optical, and electrical characterization of ([(NH₃CH₂CH₂)₃NH])₂[MnBr₅]Br₅. The title compound exhibits a unique type of inorganic arrangement created by the trigonal bipyramids. It crystallizes in noncentrosymmetric space group R32, indicating its optical activity, piezoelectricity, and second-order optical nonlinearity proven by the second harmonic of light measurements. The studied crystals exhibit intense photoluminescence originating from the Mn(II) ion ⁴T₁(G) → ⁶A₁ transition. The measured lifetime of the photoluminescence emission is ≤1.5 ms, while the measured quantum yield for both powder and crystal samples reaches ∼70%.

中文翻译：

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手性有机-无机 ([(NH3CH2CH2)3NH])2[MnBr5]Br5 光致发光和压电晶体的非线性光学活性

由于其应用优势，锰基有机无机杂化材料的家族已经大大扩展。它们还表现出卓越的明亮和尺寸可调的光致发光，可以被认为是有毒铅基化合物的完美替代品。在这项工作中，我们介绍了 ([(NH ₃ CH ₂ CH ₂ ) ₃ NH]) ₂ [MnBr ₅ ]Br ₅的详细结构、光学和电学表征。标题化合物表现出由三角双锥体产生的独特类型的无机排列。它在非中心对称空间群R 32 中结晶，表明其光学活性、压电性和通过光测量的二次谐波证明的二阶光学非线性。研究的晶体表现出源自 Mn(II) 离子⁴ T ₁ (G) → ⁶ A ₁跃迁的强烈光致发光。测得的光致发光发射寿命≤1.5 ms，而测得的粉末和晶体样品的量子产率均达到~70%。