Chiral 2D Organic Inorganic Hybrid Perovskite with Circular Dichroism Tunable Over Wide Wavelength Range
Chiral 2D Organic Inorganic Hybrid Perovskite with Circular Dichroism Tunable Over Wide Wavelength Range
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DOI：
10.1021/jacs.9b11453
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发表时间：
2020-03-04
影响因子：
15
通讯作者：
Moon, Jooho
中科院分区：
文献类型：
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作者：
Ahn, Jihoon;Ma, Sunihl;Moon, Jooho
研究了化学成分改性对手性有机铵阳离子有机无机杂化钙钛矿（手性OIHP）手性的影响。改变S-或R-C6H5CH2(CH3)NH3)(2)PbI4(1-x)Br4x中溴化物和碘化物阴离子的混合比例改变了手性OIHP的带隙，导致圆二色性（CD）信号从495 nm移动到474 nm。然而，也发现晶体结构发生突然转变，当碘决定相转变为溴决定相时，CD信号被关闭。要在溴化物决定相表现出热带活性的波长范围内获得CD，即：
The effect of chemical-composition modification on the chiroptical property of chiral organic ammonium cation-containing organic inorganic hybrid perovskite (chiral OIHP) is investigated. Varying the mixing ratio of bromide and iodide anions in S- or R-C6H5CH2(CH3)NH3)(2)PbI4(1-x)Br4x modifies the band gap of chiral OIHP, leading to a shift of the circular dichroism (CD) signal from 495 to 474 nm. However, it is also found that an abrupt crystalline structure transition occurs, and the CD signal is turned off when iodide-determinant phases are transformed into the bromide-determinant phase. To obtain CD in the wavelength range where the bromide-determinant phase is supposed to exhibit chiroptical activity, that is,