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Molecular frameworks featuring perovskite-related topologies rarely exhibit strong magnetic correlations and high-temperature magnetic order. Now it has been shown that the cubic molecular framework Cr(pyrazine)₃ exhibits persistent compensated ferrimagnetism with oxide-strength magnetic coupling and nearly zero net moment. The ferrimagnetism is sustained across a broad temperature range and extends well above room temperature.

The authors from the ALICE collaboration identify multiple species of mesons and baryons and measure the anisotropic flow with non-flow removal techniques in pp and p-Pb collisions at the LHC, identifying the hallmark of quark flow associated with an expanding quark-gluon plasma.

Phosphorus mononitride is highly unstable under atmospheric conditions and its utility for constructing elusive P–N π-bonded motifs has remained uncertain. Here, the authors show that Na(OCP) can transfer a P atom to an electrophilic osmium nitride complex to form a metal-bound P≡N ligand.

Manipulating the physical properties of solid matter using only photons is a major challenge in materials science. Here, the authors present the photochemistry occurring in a single crystal of a Mo(III) cyanide complex which undergoes a reversible breaking and reformation of dative bonds and spin state change upon exposure to visible light.

The ALICE Collaboration provides details on the microscopic mechanism that ends up creating antideuteron in high-energy proton–proton collisions at the Large Hadron Collider.

Valence tautomerism in lanthanide-based materials is rare. Now a one-dimensional samarium–pyrazine polymer has been shown to exhibit a temperature-induced hysteretic Sm(III)-to-Sm(II) reversible switch. The transition temperature is modulated in a 150 K window by alloying with Yb(II), presenting a strategy for developing new materials with chemically tunable magnetic switchability.

Ultrasmall metallic clusters receive great attention for atom-efficient catalysts. Here a metallic cluster–organic framework is synthesized and characterized; authors demonstrate its stability and catalytic proficiency, paving the way for molecular-scale metal nanoparticle interlocking.

Iridates are known to exhibit a range of exotic electronic and magnetic behaviours but it is difficult to prepare isolated [IrO₆]⁸⁻ species via soft chemical routes. Here, the authors isolate the isoelectronic [IrF₆]²⁻complex, and assess it as a model and for iridate analogues.

Achieving high conductivity in metal-organic solids can be challenging, due to the difficulty of obtaining a good overlap between the d-orbitals of the metal and the π-orbitals of the organic molecule. Here, the authors present two coordination solids, VCl₂(pyrazine)₂ and TiCl₂(pyrazine)₂, with remarkably different electrical conductivity. While the former is an insulator, the latter displays the highest conductivity of any octahedrally coordinated metal ions based metal-organic solid.

Layered coordination polymers are attractive for the preparation of advanced 2D materials but they are typically non-magnetic insulators. Now such a layered network, CrCl₂(pyrazine)₂, has been prepared that comprises a paramagnetic metal ion and a redox-active ligand. The material exhibits both magnetism — with a ferrimagnetic ground state — and high electrical conductivity.

Weak magneto-chiral dichroic effects may explain why biomolecules all have the same chirality, but they are notoriously difficult to observe. Using hard X-rays, strong magneto-chiral dichroism has now been observed in a paramagnetic molecular helix.

Measurements of the inelastic cross section of anti-³He allow the estimation of the transparency of the Milky Way to the propagation of these light antinuclei produced in either cosmic-ray collisions or annihilation of dark-matter particles.

The direct measurement of the QCD dead cone in charm quark fragmentation is reported, using iterative declustering of jets tagged with a fully reconstructed charmed hadron.

Correlations in momentum space between hadrons created by ultrarelativistic proton–proton collisions at the CERN Large Hadron Collider provide insights into the strong interaction, particularly the short-range dynamics of hyperons—baryons that contain strange quarks.

UTe₂ is a strong candidate for spin-triplet superconductivity; however, to fully understand its superconducting properties a more complete understanding of its general electronic structure is needed. Here, the authors perform two types of X-ray spectroscopy to investigate the 5 f electronic states of the uranium atom, finding unusual features for the pressure dependence of the 5 f electron count.