Insight into the Mechanochemical Synthesis and Structural Evolution of Hybrid Organic-Inorganic Guanidinium Lead(II) Iodides.,Chemistry - A European Journal

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Insight into the Mechanochemical Synthesis and Structural Evolution of Hybrid Organic-Inorganic Guanidinium Lead(II) Iodides.
Chemistry - A European Journal ( IF 3.9 ) Pub Date : 2018-11-15 , DOI: 10.1002/chem.201804066
Manuel Wilke ₁ , Nicola Casati ₁

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The in situ investigations of the mechanochemical synthesis of four hybrid organic-inorganic lead(II) iodides with the formula (C(NH2 )3 )n PbI2+n (n=1, 2, 3, and 4) are presented. Synchrotron X-ray diffraction data show that the four guanidinium lead(II) iodides easily convert into each other. Although the end product is dictated by the initial stoichiometry, complex pathways were found with different behaviors of the compounds in terms of nucleation, growth, and intermediate formation. This appears to be linked to the respective structural features of the different compounds, especially the connectivity of the inorganic framework and the strength of ionic interactions. High-temperature studies were conducted on compounds 1, 3, and 4 to reveal the new phases 1-II, 3-II, and 3-III. Unknown structures were solved from single-crystal analysis and powder X-ray diffraction.

中文翻译：

有机-无机杂化碘化铅（II）碘化物的机械化学合成和结构演变的见解。

介绍了四种化学式为（C（NH2）3）n PbI2 + n（n = 1、2、3和4）的有机-无机杂化碘化铅（II）的机械化学合成的原位研究。同步加速器X射线衍射数据表明，四种胍碘化铅（II）易于相互转化。尽管最终产物是由初始化学计量决定的，但发现在化合物的成核，生长和中间形成方面，复合途径具有不同的行为。这似乎与不同化合物各自的结构特征有关，尤其是无机骨架的连接性和离子相互作用的强度。对化合物1、3和4进行了高温研究，以揭示新的1-II，3-II和3-III相。

更新日期：2018-11-15

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