Dual-function mechanophores with both reversible and irreversible responses

Rotaxane-Based Structures Show Fluorescence Changes under Stress

Low-Temperature Zinc–Air Batteries
Electrolyte containing cesium hydroxide boosts conductivity and performance in challenging conditions

Build Your Own Microscope
Easy-to-build microscope achieves sub-micron resolution

Electrochemical Nitrogen Reduction on Mo5N6
Reaction mechanisms of nitrogen fixation on molybdenum nitride studied

Rare-Earth Element Recovery from Coal Combustion Residue
Recyclable ionic liquid used to extract coal fly ash

Directed C–H Hydroxylation with O2
Palladium complex with a bidentate pyridine-pyridone ligand as an efficient catalyst

Tuning the Basicity of a Metal-Nitrogen-Carbon Catalyst
Metal-organic framework (MOF) precursor converted to catalyst for carbon dioxide conversion

COVID-19 Antibody Responses after Vaccines and Infections
Antibody levels indicate need for two vaccine doses in those not infected before, single dose for those with past COVID-19, and booster shots for everybody

Angewandte Chemie 27/2021: Reproducibility
Overview of the latest issue of Angewandte Chemie

Methane Emissions in Large Cities Studied
Mobile measurements of methane and its sources throughout Paris, France