TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Components: The guest gate entities is associated with a different pore. The guest gate entities are associated with the same pore. The guest gate entities are reversibly attached to the pores via permanent dipole to permanent dipole bonding, hydrogen bonding, instantaneous dipole to induced dipole (vander Waals) bonding, cation-pi interactions and/or pi-pi interactions. The storage of substances is achieved via physisorption or chemisorption. The framework and/or the guest gate entities are neutral or charged (preferably cationic or anionic). The framework is anionic or cationic. The framework is a metal-organic framework. The framework is based upon a d-block transition metal, a p- or s-block block metal or f-block lanthanide or actinide. The framework is a doubly-interpenetrated anionic framework. The guest gate entities are a cationic metal centre, cluster, and/or an organic or inorganic cation (preferably piperazinium (H2ppz2+), Li+, Mg2+, and/or Al3+). The material comprises (H2ppz) (In2(L)2) or Li1.5H0.5(In2(L)2). The material is in a solvated form. The framework provides further storage capacity by defining an extension of the pores via the presence of extended framework portions. The extended framework portion comprises extended ligands. The entry of substances into the pores is achieved via pressurization, a change in temperature, the exchange stored substances by competitor substances, the use of a supercritical fluid, the use of an ionic liquid and/or chemical modification. The pressurization is carried out at pressures of 0-2x 105 Pa. The material further comprises at least one substance (preferably gas, and/or liquid, especially hydrogen gas (H2), nitrogen gas (N2), carbon dioxide (CO2), methane, acetylene, nitric oxide (NO), nitrogen oxide (NO2), carbon monoxide (CO), hydrogen cyanide (HCN), oxygen gas (O2), and volatile organic compounds) (at least 6 wt.%) releasably stored by the material. The release of substances from the pores is achieved via a lowering of the external pressure, chemical modification, a change in temperature, the exchange of stored substances by competitor substances, and/or photochemical activation. The framework is constructed from (In2(L)2)2-.L4-=1,1',4',1'',4'',1''-quaterphenyl-3,5,3''',5'''-tetracarboxylate.Preferred Method: In the method (M1), preparing the framework and then incorporating the guest gate entities, or preparing the framework and incorporating the guest gate entities in the same step; and following the preparation of the framework defining pores and guest gate entities associated with the pores. The method (M1) further involves exchanging the guest gate entities with other guest gate entities. EXAMPLE - No suitable example given.