IV.H.3 SISGR: Design and Synthesis of Chemically and Electronically Tunable Nanoporous Organic Polymers for Use in Hydrogen Storage Applications

Le résumé fourni par la source

The designed synthesis of two novel classes of porous organic polymers, borazine-linked polymers (BLPs) and benzimidazole-linked-polymers (BILPs), that are composed of chemically and electronically tunable building blocks have been performed and their use in hydrogen and other small gas storage has been investigated. Highly porous BLPs were prepared by employing thermal decomposition of amine-borane or amine-borontrihalide adducts in non-polar solvent mixtures. The textural properties and hydrogen storage capacity of these polymers were carried out using conventional low- and high-pressure gas sorption experiments. Additionally, porous BILPs featuring high imidazole linkage density were synthesized and tested for hydrogen storage. Among the most attractive properties of this class of polymers are their chemical and physical stabilities, amphoteric pore walls, and their high gas storage capabilities. BLPs can store up to 4.25 wt% of hydrogen at 77 K and 40 bar whereas BILPs can store 2.3 wt% of hydrogen at 77 K and only 1 bar. Both types of these purely organic polymers exhibit relatively moderate hydrogen isosteric heats of adsorption (6.0 to 8.3 kJ mol -1 ). An advantageous feature of these polymers is their functionalizable channels/pores that alter their affinity for small gases.

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