Molecular Sieves: Energy‐Efficient Hydrogen Separation by AB‐Type Ladder‐Polymer Molecular Sieves (Adv. Mater. 39/2014)

I. Pinnau and co-workers on page 6696 describe intrinsically ultramicroporous ladder polymers developed for energy-efficient membrane-based hydrogen separation. The versatility of an AB synthetic approach in the integration of 3D triptycene moieties into highly rigid, fully fused-ring ladder polymers yields strongly size-sieving membrane materials with exceptionally high hydrogen permeability. These novel polymeric sieves are illustrated in this cover page by Ying Zhao of Warmspace Design Inc.