Adsorption-enhanced and plasticization resistant composite membranes

A composite membrane comprising a plurality of nanocrystalline metal organic framework (MOF) nanoparticles having an average particle size of less than about 200 nanometers dispersed within a polymer material, wherein the composite membrane maintains high selectivity for a component gas in the presence a mixture of gases when compared to the pure polymer material not having the MOF, wherein the mixture of gases contains the component gas and at least one plasticizing gas, wherein the MOF comprises one or more cores comprising one or more linking moieties obtained from:

• wherein,
• R1-R2 are independently selected from the group comprising H, D, optionally substituted FG, optionally substituted alkyl, optionally substituted heteroalkyl, optionally substituted alkenyl, optionally substituted heteroalkenyl, optionally substituted alkynyl, optionally substituted heteroalkynyl, optionally substituted cycloalkyl, optionally substituted cycloalkenyl, optionally substituted aryl, optionally substituted heterocycle, and optionally substituted mixed ring system, and
• wherein the one or more cores comprise CO2+ and/or Ni2+.