Optimal Binding of Acetylene to a Nitro-Decorated Metal–Organic Framework

We
report the first example of crystallographic observation of
acetylene binding to −NO2 groups in a metal–organic
framework (MOF). Functionalization of MFM-102 with −NO2 groups on phenyl groups leads to a 15% reduction in BET surface
area in MFM-102-NO2. However, this is coupled to a 28%
increase in acetylene adsorption to 192 cm3 g–1 at 298 K and 1 bar, comparable to other leading porous materials.
Neutron diffraction and inelastic scattering experiments reveal the
role of −NO2 groups, in cooperation with open metal
sites, in the binding of acetylene in MFM-102-NO2.