In this issue, Bert M. Weckhuysen et al. review the visualization of the structure, composition, and activity of single catalyst particles for olefin polymerization and polyolefin decomposition. Chongzhao Ran and Kanyi Pu discuss moleculary generated light and its biomedical applications. The Minireviews deal with molecular rotors as fluorescent sensors for microviscosity and biomolecule conformations (Miguel Paez-Perez, Marina K. Kuimova), activatable near-infrared versatile fluorescent and chemiluminescent dicyanomethylene-4H-pyran dyes for imaging and theranostics (Juyoung Yoon et al.), as well as precision sequence-defined polymers and their biological functions (Shiyong Liu et al.).

In the original research section, Haihui Wang et al. show how to shear liquid-crystalline MXene into lamellar membranes with super-aligned nanochannels for ion sieving (see picture). Alexander Kuhn et al. used cable bacteria skeletons as catalytically active electrodes. Ifan E. L. Stephens et al. probed the degradation in lithium ion batteries with on-chip electrochemistry mass spectrometry. Hana Cahová et al. found that diadenosine tetraphosphate serves as a 5′ RNA cap in mammalian cells.

• Angewandte Chemie 6/2024: Precision,
  Angew. Chem. Int. Ed. 2024, 63 (6).

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