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1. Quaternary Pavonites A _1+x Sn _2–x Bi _5+x S ₁₀ (A ⁺ = Li ⁺ , Na ⁺ ): Site Occupancy Disorder Defines Electronic Structure

   https://doi.org/10.1021/acs.inorgchem.7b03091  

   Khoury, Jason F.; Hao, Shiqiang; Stoumpos, Constantinos C.; Yao, Zhenpeng; Malliakas, Christos D.; Aydemir, Umut; Slade, Tyler J.; Snyder, G. Jeffrey; Wolverton, Chris; Kanatzidis, Mercouri G. (February 2018, Inorganic Chemistry)
2. Unlocking High Capacity and Fast Na ⁺ Diffusion of H _x CrS ₂ by Proton‐Exchange Pretreatment

   https://doi.org/10.1002/adma.202209811  

   Stiles, Joseph W.; Soltys, Anna L.; Song, Xiaoyu; Lapidus, Saul H.; Arnold, Craig B.; Schoop, Leslie M. (January 2023, Advanced Materials)

   Abstract This study presents a new material, “H_xCrS₂” (denotes approximate composition) formed by proton‐exchange of NaCrS₂which has a measured capacity of 728 mAh g⁻¹with significant improvements to capacity retention, sustaining over 700 mAh g⁻¹during cycling experiments. This is the highest reported capacity for a transition metal sulfide electrode and outperforms the most promising proposed sodium anodes to date. H_xCrS₂exhibits a biphasic structure featuring alternating crystalline and amorphous lamella on the scale of a few nanometers. This unique structural motif enables reversible access to Cr redox in the material resulting in higher capacities than seen in the parent structure which features only S redox. Pretreatment by proton‐exchange offers a route to materials such as H_xCrS₂which provide fast diffusion and high capacities for sodium‐ion batteries. 

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3. Isomer-Dependent Electron Affinities of Fluorophenyl Radicals, ^• C ₆ H _5–x F _x (2 ≤ x ≤ 4)

   https://doi.org/10.1021/jacs.4c00556  

   McGinnis, Kristen Rose; McGee, Conor J.; Jarrold, Caroline Chick (March 2024, Journal of the American Chemical Society)
4. The factorisation property of l ^∞ ( X_k )

   https://doi.org/10.1017/s0305004120000304  

   LECHNER, RICHARD; MOTAKIS, PAVLOS; MÜLLER, PAUL F.X.; SCHLUMPRECHT, THOMAS (September 2021, Mathematical Proceedings of the Cambridge Philosophical Society)

   Abstract In this paper we consider the following problem: let X k , be a Banach space with a normalised basis ( e (k, j) ) j , whose biorthogonals are denoted by $${(e_{(k,j)}^*)_j}$$ , for $$k\in\N$$ , let $$Z=\ell^\infty(X_k:k\kin\N)$$ be their l ∞ -sum, and let $$T:Z\to Z$$ be a bounded linear operator with a large diagonal, i.e. , $$\begin{align*}\inf_{k,j} \big|e^*_{(k,j)}(T(e_{(k,j)})\big|>0.\end{align*}$$ Under which condition does the identity on Z factor through T ? The purpose of this paper is to formulate general conditions for which the answer is positive. 

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5. [La(η ^x -B _x )La] ⁻ ( x = 7–9): a new class of inverse sandwich complexes

   https://doi.org/10.1039/c8sc05443f  

   Chen, Teng-Teng; Li, Wan-Lu; Li, Jun; Wang, Lai-Sheng (February 2019, Chemical Science)

   Despite the importance of bulk lanthanide borides, nanoclusters of lanthanide and boron have rarely been investigated. Here we show that lanthanide–boron binary clusters, La 2 B x − , can form a new class of inverse-sandwich complexes, [Ln(η x -B x )Ln] − ( x = 7–9). Joint experimental and theoretical studies reveal that the monocyclic B x rings in the inverse sandwiches display similar bonding, consisting of three delocalized σ and three delocalized π bonds. Such monocyclic boron rings do not exist for bare boron clusters, but they are stabilized by the sandwiching lanthanide atoms. An electron counting rule is proposed to predict the sizes of the B x ring that can form stable inverse sandwiches. A unique (d-p)δ bond is found to play important roles in the stability of all three inverse-sandwich complexes. 

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