Themed collection 15th anniversary: Chemical Science community collection

New approaches to prepare rarer emitters such as those that are deep-blue are needed to advance OLED technologies.

The energy gaps between “forbidden” and “allowed” mechanisms of routine electrocyclic reactions can be negligibly small.

While the quantum yields of photosensitiser-derived one-electron-reduced species (OERS) significantly impact the overall efficiencies of various redox-photosensitised photocatalytic reactions, the primary factors that influence them remained unclear.

Using a novel (PPP) pincer ligand that features a central π-accepting N-heterocyclic trifluoromethyl phosphine fragment, a highly active air-stable cobalt precatalyst for the anti-Markovnikov hydroboration of alkenes is reported.

The choice of the linker significantly influences dimensionality, active site preference and catalytic activity across five Ag₁₂ cluster assemblies.

A systematic investigation is carried out for the lowest-lying triplet state of neutral and charged [N]annulenes with N = 12–66. Our aromatic stabilization energies prove that energetic (de)stabilization is important only for small annulenes.

Polymerization-induced self-assembly (PISA) is leveraged for the synthesis of ultra-high molecular weight polymers in concentrated but free-flowing dispersions.

Hydrogels with Pd_nL_2n-type junctions can be obtained by photoinitiated copolymerization of palladium cages with acrylamide monomers in water. The dynamic nature of the cage crosslinks allows for an anion-induced switch in network topology.

The OMA-seq method allows for accurate and quantitative detection of 5hmC at single-nucleotide resolution by leveraging natural deaminases. The use of orthologous enzymes for 5hmC detection enhances the toolkit available for epigenetic study.

A simple and effective iterative strategy towards previously unknown unsaturated polyacetals enabled the exploration of an alkene isomerization-domino-Coates–Claisen rearrangement sequence, globally transforming the iteratively assembled backbone.

A stereoselective strategy to make C–N atropisomeric amides based on intramolecular acyl transfer via a tethered Lewis basic pyridine or tertiary amine group is reported.

We report here a metal-free, redox-neutral photocatalytic strategy of SO₂ gas functionalization resulting in the one-pot synthesis of sulfonamides, sulfonate esters, and thiosulfonates through a photoexcited phenalenyl (PLY) ligand.

Labile RAFT end-groups are crucial for poly(methacrylate) depolymerization. Electron-donating Z-groups improve monomer recovery at lower temperatures, while electron-withdrawing groups provide molecular weight control during depolymerization.

A new class of mercapto-NSAIDs that generate persulfide, H₂S, and the NSAID is reported.

The introduction of optimized [4-HP/4-H₂P]⁺ cationic dimer pairs, instead of single monovalent [4-AP]⁺ cations, enhances birefringence by increasing the density of cationic layers and improving the alignment of anionic [3-pySO₃]⁻ groups.

We show that fluorobenzene-bound dicationic lanthanide complexes containing a single anionic ligand can show interesting single-molecule magnet properties, and can be useful starting materials to heteroleptic complexes containing bulky ligands.

A photochemical method for synthesizing 3,3-disubstituted 2,4-chromandiones is disclosed. Deprotonated 4-hydroxycoumarins, upon purple-light excitation, act as SET reductants, generating radicals to incorporate alkyl or perfluoroalkyl groups into chromanone scaffolds.