TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Material: The metal cluster has a formula MmXn. The non-linking ligand is O2-, sulfate, nitrate, nitrite, sulfite, bisulfite, phosphate, hydrogen phosphate, dihydrogen phosphate, diphosphate, triphosphate, phosphite, chloride, chlorate, bromide, bromate, iodide, iodate, carbonate, bicarbonate, sulfide, hydrogen sulfate, selenide, selenate, hydrogen selenate, telluride, tellurate, hydrogen tellurate, nitride, phosphide, arsenide, arsenate, hydrogen arsenate, dihydrogen arsenate, antimonide, antimonate, hydrogen antimonate, dihydrogen antimonate, fluoride, boride, borate, hydrogen borate, perchlorate, chlorite, hypochlorite, perbromate, bromite, hypobromite, periodate, iodite, and/or hypoiodite. The guest species can be metal complexes having formula MmXn.M=metal ion (preferably Mg2+, Ca2+, Sr2+, Ba2+, V2+, V3+, V4+, V5+, Mn2+, Re2+, Fe2+, Fe3+, Ru3+, Ru2+, Os2+, Co2+, Rh2+, Ir2+, Ni2+, Pd2+, Pt2+, Cu2+, Zn2+, Cd2+, Hg2+, Si2+, Ge2+, Sn2+, or Pb2+);X=Group 14-17 anion (preferably O, N or S);m=1-10;n=number to charge balance the metal cluster.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Component: Each multidentate linking ligand includes greater than or equal to2 carboxylates. It has greater than or equal to6 (preferably greater than or equal to12) atoms that are incorporated in aromatic rings or non-aromatic rings. The metal-organic framework further comprises pores for gas adsorption, the pores having a multimodal size distribution. It further comprises a non-linking ligand and a guest species that increase the surface area of the metal-organic framework.Preferred Material: The guest species can be organic molecules with a molecular weight less than 100, less than 300, less than 600 or greater than 600 g/mol, organic molecules containing aromatic ring, and/or polycyclic aromatic hydrocarbons. The multidentate linking ligands comprise one or more of 20 ligands, e.g. ligands of formulae (1), (2) and (3).X=H, -NHR, -N(R)2, halides, 1-10C alkyl, 6-18C aryl, 6-18C aralkyl, -NH2, alkenyl, alkynyl, -Oalkyl, -NH(aryl), cycloalkyl, cycloalkenyl, cycloalkynyl, -(CO)R, -(SO2)R, -(CO2)R-SH, -S(alkyl), -SO3H, -SO3-M+, -COOH, -COO-M+, -PO3H2-, -PO3H-M+, -PO32-M2+, or -PO32-M2+, -NO2, -CO2H, silyl derivatives, borane derivatives, ferrocenes or other metallocenes;M=metal atom;R=1-10C alkyl.Preferred Parameter: The ligands are removed by heating the precursor MOF to a temperature of 30-300degreesC; and/or by exposing the precursor MOF to a vacuum having a pressure of 10-5-700 torr.