A series of fluoroalkylated cyclic λ3‐iodanes and their hydrochloride salts was prepared and used in a combination with sodium ascorbate in buffer or aqueous methanol mixtures for radical fluoroalkylation of a range of substituted indoles, pyrroles, tryptophan or its derivatives, and Trp residues in peptides. As demonstrated on several peptides, the aromatic amino acid residues of Trp, Tyr, Phe, and His are targeted with high selectivity to Trp. The functionalization method is biocompatible, mild, rapid, and transition‐metal‐free. The proteins myoglobin, ubiquitin, and human carbonic anhydrase I were also successfully functionalized.

Three cyclic silylselenides were prepared in a straightforward manner. Property tuning has been achieved by varying the ring size and the number of embedded selenium atoms. All silylselenides possess improved resistance towards moisture and oxidation as well as high thermal robustness and sufficient volatility with almost zero residues. The six‐membered diselenide proved to be particularly superior Se precursors for atomic layer deposition and allowed facile preparation of MoSe2 layers. Their structure and composition have been investigated by Raman and X‐ray photoelectron spectroscopy as well as scanning electron microscopy revealing vertically aligned flaky shaped nanosheets.

The current portfolio of organoselenium compounds applicable as volatile precursors for atomic layer deposition can be denoted as very limited. Hence, we report herein facile and cost-effective preparation of two bis(trialkylstannyl)selenides as well as one selenole and three bis(trialkylsilyl)selenides. Their syntheses have been optimized to: (i) use readily available and inexpensive starting materials, (ii) involve operationally simple methodology (heating in a pressure vessel), (iii) use a minimum amount of additives and catalysts, and (iv) either exclude additional purification or involve only simple distillation. The chemical structure of prepared Se derivatives was confirmed by multinuclear NMR and GC/MS. Their fundamental thermal properties were investigated by differential scanning calorimetry (DSC) and TGA methods that revealed thermal stability within the range of 160–300 °C.

Diselenadisiletanes possess easy preparation, tailored stability, reactivity, volatility and fast exchange ALD reaction to afford MoSe2 flakes of high quality.

We establish solution atomic layer deposition (sALD) for the controlled growth of pure Sb 2 Se 3 thin films under mild conditions, namely, room temperature and atmospheric pressure. Upscaling this process yields Sb 2 Se 3 thin films with high homogeneity over large-area (4″) substrates. Annealing of the initially amorphous material leads to highly crystalline and smooth Sb 2 Se 3 thin films. Removing the constraints of thermal stability and sufficient volatility in sALD compared to traditional gas-phase ALD opens up a broad choice of precursors and allows us to examine a wide range of Se 2− precursors, of which some exhibit facile synthetic routes and allow us to tune their reactivity for optimal experimental ease of use. Moreover, we demonstrate that the solvent used in sALD represents an additional, attractive tool to influence and tailor the reactivity at the liquid−solid interface between the precursors and the surface.

In an underwater sea scene, the key process of protein functionalization on tryptophan is shown. The follow‐up click reaction by using the pink reagent carrying a payload delivers the conjugate of choice. Realistic depiction of hypervalent iodine reagents includes the T‐shape geometry on the iodine atom and the azido‐containing fluoroalkyl group. On the seabed there are side products from the reagent after the reaction with the protein. More information can be found in the Full Paper by P. Novák, P. Beier, et al. on page 15779.