We seek to develop highly robust MOF materials as high capacity gas storage systems and request 12 days on TOSCA to study the binding interaction between adsorbed gas molecules (CO2/C2H2/C2H4/C2H6/C3H6/C3H8) and three isostructural MOFs incorporating different functional groups as a function of gas loading. This proposed study will investigate the vibrational properties exhibited by both adsorbed gas substrates (except for CO2 due to the low neutron scattering cross sections) and the porous hosts. MFM-102-NO2 exhibit exceptionally high storage capacity for CO2 and light hydrocarbons at ambient conditions with fully reversible uptake, suggesting the presence of specific guest-host interaction.