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Volume 8 Issue 4, April 2024

Upconversion enables the energy of two long wavelength photons to be combined, resulting in photoexcitation that would otherwise require a single short wavelength photon. Longer wavelength photons penetrate more deeply and so upconversion is especially useful for phototherapy and applications of photochemical reactions on a large scale. This process is shown on the cover where a green target absorbs two red incident rays and emits a single blue ray. See Huang et al.

Cover design: Carl Conway

Comment

  • The Chemical Weapons Convention has a unique Scientific Advisory Board that ensures it keeps pace with science, and its implementing body is prepared for future challenges. It is a model that could be usefully applied to other disarmament treaties.

    • Sarah Clapham
    • Peter J. Hotchkiss
    Comment

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Research Highlights

  • Typically thought of as inert and non-participating atoms, noble gasses adsorbed onto freshly cleaved single crystal surfaces enhance their electronic band structures, potentially creating more active heterogeneous catalysts.

    • Alexander Rosu-Finsen
    Research Highlight
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Year in Review

  • Targeted covalent inhibitors (TCIs) can react irreversibly with lysine in kinases and other proteins. Small molecule TCIs can have both broad or specific lysine targeting whereas peptide- and protein-based TCIs were shown to provide high target specificity for lysines in shallow protein surfaces.

    • Ana Koperniku
    • Nicholas A. Meanwell
    Year in Review
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Reviews

  • Organic-based triplet–triplet annihilation upconversion-mediated photochemical reactions utilize low-energy photons to obtain high-energy excited states leading to notable advancements in photoredox catalysis, photoactivation, 3D printing and immunotherapy. Classifications, design principles, challenges and possible solutions are discussed in this Review.

    • Ling Huang
    • Gang Han
    Review Article
  • Anion recognition in competitive, aqueous media remains a critical challenge. Bulk and local solvation models for anion recognition events are herein explored, as well as targeted design approaches to retain strong anion binding in highly polar media.

    • Sophie C. Patrick
    • Paul D. Beer
    • Jason J. Davis
    Review Article
  • The use of water for electrochemical hydrogenation and oxidation of organic species provides a sustainable route for synthesizing chemicals. The electrode types, general electrocatalyst selection principles and interface microenvironment control are elucidated, conducive to designing efficient electrocatalysts and reaction systems.

    • Cuibo Liu
    • Fanpeng Chen
    • Bin Zhang
    Review Article
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