This IRG applies synthetic organic and coordination chemistry to design electronic states in two-dimensional superlattices and related low-dimensional materials, aiming to realize collective phenomena such as superconductivity and quantum spin liquids. Unlike traditional symmetry-breaking approaches, the team assembles molecules onto, or superimposes molecular lattices over, a parent low-dimensional solid-state material, preparing well-defined, synthetically tunable electronic potential modulations. Multiscale modeling guides the design of these long-period superlattices and provides feedback for the synthesis of superlattices with flat electronic bands and novel emergent correlated phenomena.