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Photoluminescent Properties of Two-Dimensional Manganese(II)-Based Perovskites with Different-Length Arylamine Cations
Inorganic Chemistry ( IF 4.3 ) Pub Date : 2022-07-20 , DOI: 10.1021/acs.inorgchem.2c01730 Shihui He 1 , Shiqiang Hao 2 , Jiawei Lin 3 , Na Wang 1 , Jindong Cao 1 , Zhongnan Guo 3 , Christopher Wolverton 2 , Jing Zhao 1 , Quanlin Liu 1
Inorganic Chemistry ( IF 4.3 ) Pub Date : 2022-07-20 , DOI: 10.1021/acs.inorgchem.2c01730 Shihui He 1 , Shiqiang Hao 2 , Jiawei Lin 3 , Na Wang 1 , Jindong Cao 1 , Zhongnan Guo 3 , Christopher Wolverton 2 , Jing Zhao 1 , Quanlin Liu 1
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The participation of organic cations plays an important role in tuning broad-spectra emissions. Herein, we synthesized a series of Mn(II)-based two-dimensional (2D) halide perovskites with arylamine cations of different lengths having the general formula (C6H5(CH2)xNH3)2MnCl4 (x = 1–4), with the x = 4 compound reported here for the first time. With the increase in the −(CH2)– in organic cations, the distance between adjacent inorganic layers increases, causing the title compounds to exhibit different structural distortions. As the Mn–Cl–Mn angular distortion increases, the experimental optical band gaps of the title compounds increase correspondingly. When the angle distortion between the octahedrons of the compounds is similar, the band gaps may also be affected by the distortion of the octahedron itself (the bond-length distortion of 2 is greater than that of 4). Under UV-light irradiation at 298 K, all of the compounds exhibit two emission peaks centered at 480–505 and 610 nm, corresponding to the organic-cation emission and the 4T1(G) to 6A1(S) radiative transition of Mn2+ ions, respectively. Among these title compounds, (PPA)2MnCl4 [(PPA)+ = C6H5(CH2)3NH3+] exhibits the strongest photoluminescence (PL). The study of the title compounds contributes to an in-depth understanding of the relationship between the structural distortion and optical properties of 2D Mn(II)-based perovskite materials.
中文翻译：
具有不同长度芳胺阳离子的二维锰(II)基钙钛矿的光致发光性能
有机阳离子的参与在调节广谱发射中起着重要作用。在此，我们合成了一系列具有不同长度芳胺阳离子的Mn(II)基二维(2D)卤化物钙钛矿，通式为(C 6 H 5 (CH 2 ) x NH 3 ) 2 MnCl 4 ( x = 1-4），这里首次报道了x = 4 化合物。随着-(CH 2)– 在有机阳离子中，相邻无机层之间的距离增加，导致标题化合物表现出不同的结构扭曲。随着 Mn-Cl-Mn 角畸变的增加，标题化合物的实验光学带隙相应增加。当化合物的八面体之间的角度畸变相似时，带隙也可能受到八面体本身畸变的影响（2的键长畸变大于4的键长畸变）。在 298 K 的紫外光照射下，所有化合物都表现出两个以 480-505 和 610 nm 为中心的发射峰，对应于有机阳离子发射和4 T 1 (G) 到6 A 1(S)分别是Mn 2+离子的辐射跃迁。在这些标题化合物中，(PPA) 2 MnCl 4 [(PPA) + = C 6 H 5 (CH 2 ) 3 NH 3 + ]表现出最强的光致发光(PL)。标题化合物的研究有助于深入了解二维 Mn(II) 基钙钛矿材料的结构畸变与光学性质之间的关系。
更新日期：2022-07-20
中文翻译：
具有不同长度芳胺阳离子的二维锰(II)基钙钛矿的光致发光性能
有机阳离子的参与在调节广谱发射中起着重要作用。在此，我们合成了一系列具有不同长度芳胺阳离子的Mn(II)基二维(2D)卤化物钙钛矿，通式为(C 6 H 5 (CH 2 ) x NH 3 ) 2 MnCl 4 ( x = 1-4），这里首次报道了x = 4 化合物。随着-(CH 2)– 在有机阳离子中，相邻无机层之间的距离增加，导致标题化合物表现出不同的结构扭曲。随着 Mn-Cl-Mn 角畸变的增加，标题化合物的实验光学带隙相应增加。当化合物的八面体之间的角度畸变相似时，带隙也可能受到八面体本身畸变的影响（2的键长畸变大于4的键长畸变）。在 298 K 的紫外光照射下，所有化合物都表现出两个以 480-505 和 610 nm 为中心的发射峰，对应于有机阳离子发射和4 T 1 (G) 到6 A 1(S)分别是Mn 2+离子的辐射跃迁。在这些标题化合物中，(PPA) 2 MnCl 4 [(PPA) + = C 6 H 5 (CH 2 ) 3 NH 3 + ]表现出最强的光致发光(PL)。标题化合物的研究有助于深入了解二维 Mn(II) 基钙钛矿材料的结构畸变与光学性质之间的关系。
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