Several imine-based covalent organic frameworks (COFs) are designed and synthesized having varying degrees of fluorination for application as hydrogen storage materials. Self-complimentary π-stacking interactions between phenyl and perfluorophenyl units are employed to improve both the crystallinity of the COF and the surface area of the material relative to non-fluorinated and highly fluorinated COFs. Several strategies are discussed and implemented for intercalating metals into the framework, including vapor deposition techniques. Strategic fluorination is then employed for tuning the Lewis acidity of metals intercalated into the COF structure in an attempt to enhance H<sub>2</sub> binding enthalpies at these metal sites. A systematic study of the H<sub>2</sub> sorption characteristics of these materials using temperature programmed desorption and pressure-composition temperature data is presented.

Hydrogen sorption in fluorinated organic frameworks

2019 Spring National Meeting

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