Crystal Engineering of an nbo Topology Metal–Organic Framework for Chemical Fixation of CO₂ under Ambient Conditions

Crystal engineering of the nbo metal–organic framework (MOF) platform MOF‐505 with a custom‐designed azamacrocycle ligand (1,4,7,10‐tetrazazcyclododecane‐ N , N ′, N ′′, N ′′′‐tetra‐ p ‐methylbenzoic acid) leads to a high density of well‐oriented Lewis active sites within the cuboctahedral cage in MMCF‐2, [Cu 2 (Cu‐tactmb)(H 2 O) 3 (NO 3 ) 2 ]. This MOF demonstrates high catalytic activity for the chemical fixation of CO 2 into cyclic carbonates at room temperature under 1 atm pressure.