In-silico design of porous polymer networks: high-throughput screening for methane storage materials

R. L. Martin, C. M. Simon, B. Smit, and M. Haranczyk, In-silico design of porous polymer networks: high-throughput screening for methane storage materials J. Am. Chem. Soc. 136 (13), 5006 (2014) http://dx.doi.org/10.1021/ja4123939


Abstract: Porous polymer networks (PPNs) are a class of advanced porous materials that combine the advantages of cheap and stable polymers with the high surface areas and tunable chemistry of metal-organic frameworks. They are of particular interest for gas separation or storage applications, for instance as methane adsorbents for a vehicular natural gas tank or other portable applications. PPNs are self-assembled from distinct building units; here, we utilize commercially available chemical fragments and two experimentally-known synthetic routes to design in-silico a large database of synthetically realistic PPN materials. All structures from our database of 18,000 materials have been relaxed with semi-empirical electronic structure methods and characterized with Grand-canonical Monte Carlo simulations for methane uptake and deliverable (working) capacity. A number of novel structure-property relationships that govern methane storage performance were identified. The relationships are translated into experimental guidelines to realize the ideal PPN structure. We found that cooperative methane-methane attractions were present in all of the best performing materials, highlighting the importance of inter-guest interaction in the design of optimal materials for methane storage.

ja-2013-123939_0016



© Berend Smit 2013