Role of Metal–Chloride Anions in Photoluminescence Regulations for Hybrid Metal Halides,The Journal of Physical Chemistry Letters

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Role of Metal–Chloride Anions in Photoluminescence Regulations for Hybrid Metal Halides
The Journal of Physical Chemistry Letters ( IF 4.8 ) Pub Date : 2021-02-16 , DOI: 10.1021/acs.jpclett.1c00182
Binbin Su ₁ , Gaomin Song ₂ , Maxim S. Molokeev _{3,

4,

5} , Nicolay N. Golovnev ₄ , Maxim K. Lesnikov ₄ , Zheshuai Lin _{2,

6} , Zhiguo Xia ₁

Affiliation

Organic–inorganic hybrid metal halides with emissive organic cations are of great interest due to their structural diversity and interesting photophysical properties. Here, we assemble emissive organic cations (EnrofloH₂²⁺) with different metal–chloride anions (Pb₂Cl₆^2– to Bi₂Cl₁₀^4– to SnCl₆^2–) to form the new single crystal phases, and thus the photoluminescence properties of the metal halides, including Stokes shift, full width at half-maximum (FWHM), and photoluminescence quantum yield (PLQY) have been studied accordingly. (EnrofloH₂)SnCl₆·H₂O, as an example, possesses narrow FWHM and high PLQY, which are caused by the strong π–π stacking and inter- and intramolecular hydrogen bonds interactions. Compared with EnrofloH₂²⁺ cation in solution, the interactions generate a restraining effect and increase the rigid degree of EnrofloH₂²⁺ cation in the bulk single crystals. Our work clarifies the photophysical properties of the EnrofloH₂²⁺ organic cations by constructing the inter- and intramolecular interactions and boosts the further study of organic–inorganic hybrid metal halides materials with different luminescence mechanisms.

中文翻译：

金属氯化物阴离子在杂化金属卤化物的光致发光调控中的作用

带有发射有机阳离子的有机-无机杂化金属卤化物因其结构多样性和令人感兴趣的光物理性质而备受关注。在这里，我们将发射的有机阳离子（EnrofloH ₂²⁺）与不同的金属氯化物阴离子（Pb ₂ Cl ₆^2–到Bi ₂ Cl ₁₀^4–到SnCl ₆^2–）组装形成新的单晶相，因此相应地研究了金属卤化物的光致发光特性，包括斯托克斯位移，最大半峰全宽（FWHM）和光致发光量子产率（PLQY）。（EnrofloH ₂）SnCl ₆ ·H ₂例如，O具有较窄的FWHM和较高的PLQY，这是由强烈的π-π堆积以及分子间和分子内氢键相互作用引起的。与溶液中的EnrofloH ₂²⁺阳离子相比，这种相互作用产生了抑制作用，并提高了块状单晶中EnrofloH ₂²⁺阳离子的刚性度。我们的工作通过构建分子间和分子内相互作用，阐明了EnrofloH ₂²⁺有机阳离子的光物理性质，并促进了具有不同发光机理的有机-无机杂化金属卤化物材料的进一步研究。

更新日期：2021-02-25

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