Lawrence Berkeley National Laboratory (LBNL), as part of the Discovery of Carbon Capture Substances and Systems (DOCCSS) initiative, will develop a novel amine-based solid sorbent for capture of carbon dioxide (CO₂) from flue gas. The sorbent consists of a metal-organic framework (MOF) coated with alkyl amines with high affinity for CO₂. The amine-appended solid sorbents capture CO₂ in a cooperative manner through a chain reaction. The cooperative adsorption mechanism allows the sorbents to exhibit step-shaped adsorption isotherms, which allow for larger working capacities with only moderate temperature swings in contrast to the large temperature swings required by traditional amine-based sorbents. The MOF is inexpensive, as well as chemically and thermally robust. The research team will identify, synthesize, and characterize amine-MOF pairs using existing and new computationally designed MOF and amine structures. The synthesized sorbent materials will be tested using simulated flue gas to determine CO₂ adsorption and desorption kinetics, tolerance to flue gas impurities, and cycling performance, as well as to identify the most promising sorbents with realistic potential for industrial implementation in carbon capture. DOCCSS is a partnership coupling unique skill sets and perspectives of national laboratories, industry, and academic institutions, working collaboratively to facilitate discovery, synthesis, performance assessment, and functionalization of new carbon capture materials, and to accelerate the rate at which transformational processes for carbon capture are commercialized.