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Your search keyword '"Snurr, Randall Q."' showing total 133 results
Start Over Author "Snurr, Randall Q." Publication Year Range Last 10 years Language english Publisher american chemical society
133 results on '"Snurr, Randall Q."'

21. Advances, Updates, and Analytics for the Computation-Ready, Experimental Metal–Organic Framework Database: CoRE MOF 2019

Author

Chung, Yongchul G., Haldoupis, Emmanuel, Bucior, Benjamin J., Haranczyk, Maciej, Lee, Seulchan, Zhang, Hongda, Vogiatzis, Konstantinos D., Milisavljevic, Marija, Ling, Sanliang, Camp, Jeffrey S., Slater, Ben, Siepmann, J. Ilja, Sholl, David S., and Snurr, Randall Q.

Abstract

Over 14 000 porous, three-dimensional metal–organic framework structures are compiled and analyzed as a part of an update to the Computation-Ready, Experimental Metal–Organic Framework Database (CoRE MOF Database). The updated database includes additional structures that were contributed by CoRE MOF users, obtained from updates of the Cambridge Structural Database and a Web of Science search, and derived through semiautomated reconstruction of disordered structures using a topology-based crystal generator. In addition, value is added to the CoRE MOF database through new analyses that can speed up future nanoporous materials discovery activities, including open metal site detection and duplicate searches. Crystal structures (only for the subset that underwent significant changes during curation), pore analytics, and physical property data are included with the publicly available CoRE MOF 2019 database.

Published
2019

46. Ab Initio Screening of Metal Catecholates for Adsorption of Toxic Pnictogen Hydride Gases.

Author

Scott Bobbitt, N. and Snurr, Randall Q.

Subjects
*AB initio quantum chemistry methods, *ADSORPTION (Chemistry), *HYDRIDES, *DENSITY functional theory, *FUNCTIONAL groups, *PHOSPHINE
Abstract

Density functional theory was used to study interactions between phosphine and 17 functional groups, revealing that only the functional groups containing metal ions bind phosphine strongly. This led to a detailed examination of the adsorption of the pnictogen hydride gases ammonia, phosphine, and arsine on 33 metal catecholates in order to examine periodic trends in the binding strength for these adsorbates. Phosphine and arsine adsorption is primarily driven by donation of electron density from the adsorbate molecule to the metal atom, while ammonia binding involves both electron donation and a significant Coulomb attraction between the negatively charged N atom and the positive metal atom. This Coulomb effect results in notably different binding behavior for ammonia than for phosphine and arsine, which are quite similar to each other. Generally, for metals on the left side of the periodic table, the Coulomb effect dominates in ammonia adsorption, and metals on the right side of the periodic table have lower positive charge and accept greater amounts of electron density, making the electron-sharing contribution more important to the binding strength. We find that more electronegative metals, particularly Pd, Ir, Pt, and Au, which accept more electron density from the adsorbate, yield the best selectivity for the target molecules over water because water adsorption is mostly due to Coulomb attraction. We also analyze changes in the d orbital occupancy upon ammonia and phosphine adsorption. [ABSTRACT FROM AUTHOR]

Published
2017
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