Manipulating the d-band center of Cu( i )-MOFs for the catalytic ignition of [BMIM]N(CN) 2 IL-H 2 O 2 propellants

Ligand electronegativity modulates Cu-SH′ through Cu-S 3 coordination to shift the d-band center of Cu( i ) closer to the Fermi level. This boosts ˙OH and 1 O 2 from H 2 O 2 , making [BMIM]N(CN) 2 -H 2 O 2 hypergolic with ultrafast ignition ( t id = 18.4 ms).