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首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >Synthesis, post-synthetic modification and stability of a 2D styryl ammonium lead iodide hybrid material
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Synthesis, post-synthetic modification and stability of a 2D styryl ammonium lead iodide hybrid material

机译:合成,合成后修饰和2D styryl氨铅碘化物杂化材料的稳定性

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A new hybrid lead iodide material (HP1) having 4-vinylphenylene ammonium as the organic cation has been prepared. The structural formula based on chemical analysis of HP1 corresponds to PbI2.5(4-styrylammonium)(0.5). The crystallinity of HP1 was confirmed by powder X-ray diffraction and high resolution transmission electron microscopy. The presence of the styryl ammonium moiety in HP1 allows post-synthetic modification by radical copolymerization with styrene to obtain the HP2 material with higher hydrophobicity. Stability tests reveal that both HP1 and HP2 show hydrogen evolution in the dark, indicating about 0.6% partial decomposition of the hybrid material. This hydrogen evolution increases by a factor of 3 when HP1 and HP2 are exposed to visible light. X-ray photoelectron spectroscopy analysis shows an increase of NH2 groups and a decrease of NH3+ units suggesting that the origin of hydrogen evolution is the deprotonation of ammonium ions.
机译:制备了具有4-乙烯基苯基铵作为有机阳离子的新的杂交铅碘化物材料(HP1)。 基于HP1化学分析的结构式对应于PBI2.5(4-丁基甲基)(0.5)。 通过粉末X射线衍射和高分辨率透射电子显微镜证实HP1的结晶度。 HP1中的STYRYL铵部分的存在允许通过与苯乙烯的自由基共聚化进行合成后改性,得到具有更高疏水性的HP2材料。 稳定性测试表明,HP1和HP2都显示了暗黑的氢进化,表明杂化材料的偏分解约0.6%。 当HP1和HP2暴露于可见光时,这种氢进化增加了3倍。 X射线光电子能谱分析显示NH 2组的增加和NH3 +单元的降低,表明氢化的起源是铵离子的去质子。

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