https://scholars.lib.ntu.edu.tw/handle/123456789/611516
標題: | Efficient determination of accurate force fields for porous materials using ab initio total energy calculations | 作者: | Kim J. Lin L.-C. Lee K. Neaton J.B. Smit B. LI-CHIANG LIN |
關鍵字: | Ab initio total energy;Adsorption properties;Classical force fields;Computational costs;Grand canonical Monte Carlo simulation;Metal organic framework;Quantum-mechanical calculation;Single-point energy;Adsorption;Carbon dioxide;Crystalline materials;Java programming language;Monte Carlo methods;Porous materials;Quantum theory;Calculations | 公開日期: | 2014 | 卷: | 118 | 期: | 5 | 起(迄)頁: | 2693-2701 | 來源出版物: | Journal of Physical Chemistry C | 摘要: | Accurate characterization of porous materials is essential for understanding material properties and evaluating their performance for potential applications. In general, any methodology that entails developing an accurate classical force field is computationally expensive as it requires a large number of quantum mechanical nonempirical calculations. In order to expedite such calculations without sacrificing too much accuracy, we have developed a systematic procedure where, starting from an initial trial force field, accurate adsorption isotherms of porous materials can be obtained at low computational cost. Specifically, the procedure involves correcting single-point energy values sampled from the trial force field in grand canonical Monte Carlo simulations from few quantum mechanical calculations. We demonstrate that the methodology yields accurate adsorption data in diverse selection of guest molecules in porous materials such as CH4 and CO2 in zeolites (i.e., MFI, LTA, WEI, RHO, SOD, FAU, RWY, and ABW) and CO2 in metal-organic frameworks (i.e., M-MOF-74 with M = Mg, Fe). Furthermore, we use our corrected force fields to predict the adsorption properties of N2 in V-MOF-74 and Ti-MOF-74, which are two materials that have yet to be synthesized experimentally. We anticipate that this methodology will be useful in accurately characterizing a given porous material in the absence of a reliable force field as well as for efficiently screening a large number of porous materials. ? 2014 American Chemical Society. |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84893862848&doi=10.1021%2fjp412368m&partnerID=40&md5=3b97b520dd784e2750f1499968f4c2c7 https://scholars.lib.ntu.edu.tw/handle/123456789/611516 |
DOI: | 10.1021/jp412368m |
顯示於: | 化學工程學系 |
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