{Reference Type}: Journal Article {Title}: Spiroligomer-Based Macrocycles for Atomically Precise Membranes. {Author}: Xie Y;Luo D;Wiener JA;Koval AB;Pfeiffer CT;Schafmeister CE; {Journal}: Angew Chem Int Ed Engl {Volume}: 62 {Issue}: 27 {Year}: 2023 Jul 3 {Factor}: 16.823 {DOI}: 10.1002/anie.202302809 {Abstract}: Here, we report a new class of peptidomimetic macrocycles with well-defined three-dimensional structures and low conformational flexibility. They are assembled from fused-ring spiro-ladder oligomers (spiroligomers) by modular solid-phase synthesis. Two-dimensional nuclear magnetic resonance confirms their shape persistency. Triangular macrocycles of tunable sizes assemble into membranes with atomically precise pores, which exhibit size and shape-dependent molecular sieving towards a series of structurally similar compounds. The exceptional structural diversity and stability of spiroligomer-based macrocycles will be explored for more applications.