NOVELTY - A material for the releasable storage of at least one substances comprises a framework having at least one pore; and at least one guest gate entities associated with the pores, where the guest gate entities are capable of reversibly at least hindering the entry into the pores, or release from the pores of the substances, and where the guest gate entities are capable of enhancing the uptake of substances into the pores of the framework and/or the isosteric heat of adsorption of substances.    USE - In the container for the releasable storage of substances (including hydrogen gas, nitrogen gas, carbon dioxide, methane, acetylene, nitric oxide, nitrogen oxide, carbon monoxide, hydrogen cyanide, oxygen gas, and volatile organic compound), separate at least two different substances by the preferential storage and release of the substances over the remaining substances; in fuel cells, batteries, electronics, chemical storage, sensors or the delivery of pharmaceuticals (claimed).    ADVANTAGE - The material exhibits hysteresis; has greater hydrogen storage capacity; and stores the substance at lower pressure and closer to ambient temperature.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for following:    (1) manufacturing (M1) a material for the releasable storage of substances involving preparing a framework having pores in the presence of guest gate entities, where the material has the guest gate entities associated with the pores and the guest gate entities are capable of reversibly at least hindering the entry into the pores, or release from the pores of substances;    (2) manufacturing a material involving providing a material and introducing the substances by pressurisation, a change in temperature, the exchange of stored substances by competitor substances, the use of a supercritical fluid, the use of an ionic liquid and/or chemical modification;    (3) a container enclosing a material;    (4) a framework for the releasable storage of at least one substance, where the framework has pores, and where the framework is suitable to guest gate entities associated with the pores to reversibly at least hinder the entry into the pores, or release from the pores of substances;    (5) producing H2 involving storing H2 in a storage container containing a material and releasing it later, over time, using the guest gate entities and a pressure differential across the container to control the release of H2; and    (6) separating substances from a mixture of substances involving storing substances in a storage container containing a material and/or releasing the substances from a storage container containing a material, where the presence of the guest gate entities enables the preferential storage and/or release of substances over the remaining substances.