Hydrogen Bonding Controls the Structural Evolution in Perovskite-Related Hybrid Platinum(IV) Iodides
作者:Hayden A. Evans、Douglas H. Fabini、Jessica L. Andrews、Mitchell Koerner、Molleigh B. Preefer、Guang Wu、Fred Wudl、Anthony K. Cheetham、Ram Seshadri
DOI:10.1021/acs.inorgchem.8b01597
日期:2018.8.20
We describe the solid-state structural evolution in four hybrid hexaiodoplatinate(IV) compounds, demonstrating the increasingly important role that extended hydrogen bonding plays in directing the structure across the series. The compounds are A2PtI6, where A is one of the following amines: ammonium, NH4+; methylammonium, CH3NH3+; formamidinium, CH(NH2)2+; guanidinium, C(NH2)3+. These are closely related
我们描述了四种杂六碘铂酸盐(IV)化合物的固态结构演化,证明了扩展氢键在指导整个系列的结构中发挥着越来越重要的作用。化合物为A 2 PtI 6,其中A为以下胺之一:铵,NH 4 +;甲基铵,CH 3 NH 3 +;甲ami,CH(NH 2)2 + ; 胍,C(NH 2)3 +。这些在结构和性能上与最近在光电领域确立了自己才能的铅(II)混合卤化物钙钛矿密切相关。尽管涉及钙钛矿的耐受性因子相对较大,但这些化合物中的前三个在K 2 PtCl 6原型中以空位有序的双重钙钛矿A 2 Pt□I 6(□表示空位)结构结晶。最后一种化合物(GUA)2 PtI 6以六角形CsNiCl 3结构的空位有序变体结晶:K 2 MnF 6结构。固态195 Pt和1的组合1 H NMR光谱和详细的密度泛函理论计算有助于揭示结构趋势并建立氢键趋势。计算和测得的光学性质支持了这些碘代盐化合物中的令人惊讶的观察结果,尽管缺