二甲基胺阳离子掺杂甲胺铅溴钙钛矿材料的固体NMR研究
A Solid-state NMR Study of Dimethylamine Cation-doped MAPbBr3 Perovskite Materials
二甲基胺阳离子掺杂甲胺铅溴钙钛矿材料的固体NMR研究 |
| 马开阳,乔文成,王雪璐,姚叶锋 |
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A Solid-state NMR Study of Dimethylamine Cation-doped MAPbBr3 Perovskite Materials |
| MA Kaiyang,QIAO Wencheng,WANG Xuelu,YAO Yefeng |
| 图7 (a) DMA离子的双重旋转模型：甲基进行内旋转，同时DMA离子整体绕旋转轴Rc进行旋转，Rc为DMA离子C-N-C键的面内角平分线；(b)在发生上述双重旋转运动下，DMA氘代甲基的模拟2H NMR谱.谱图模拟条件：θ = 54.7?，绕旋转轴Rc的旋转速率达到fast limit；(c)在发生上述双重旋转运动下，DMA氘代甲基的模拟2H NMR谱.谱图模拟条件：θ = 54.7?，绕旋转轴Rc的旋转速率（Ω）从40 kHz变化到1 600 kHz |
| Fig. 7 (a) The double rotation model of DMA cation: the methyl groups undergo the intrinsic rotation along C-N bond and meanwhile DMA rotates along Rc axis, which is the in-plane bisector of the C-N-C angle; (b) The simulated 2H NMR spectrum of CD3 in DMA using the model in (a). Simulation condition: the angle between Rc and C-N axis θ = 54.7?, and the rotation rate reaches fast limit; (c) The simulated 2H NMR spectra of CD3 in DMA using the model in (a). Simulation condition: the angle between Rc and C-N axis θ = 54.7?, and the rotation rates (Ω) range from 40 kHz to 1 600 kHz |
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