Microporosity of a Guanidinium Organodisulfonate Hydrogen-Bonded Framework |
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| Authors: | Ivana Brekalo David E. Deliz Prof. Leonard J. Barbour Prof. Michael D. Ward Prof. Tomislav Friščić Prof. K. Travis Holman |
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| Affiliation: | 1. Department of Chemistry, Georgetown University (GU), 37th and O Street NW, 20057 Washington, DC, USA;2. Department of Chemistry and Polymer Science, University of Stellenbosch, Matieland, 7600 South Africa;3. Molecular Design Institute, Department of Chemistry, New York University, 100 Washington Square East, 10003 New York, USA;4. Department of Chemistry, McGill University, Montreal, Quebec, H3A 0B8 Canada |
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| Abstract: | Guanidinium organosulfonates (GSs) are a large and well-explored archetypal family of hydrogen-bonded organic host frameworks that have, over the past 25 years, been regarded as nonporous. Reported here is the only example to date of a conventionally microporous GS host phase, namely guanidinium 1,4-benzenedisulfonate ( p -G2BDS ). p -G2BDS is obtained from its acetone solvate, AcMe@ G2BDS , by single-crystal-to-single-crystal (SC-SC) desolvation, and exhibits a Type I low-temperature/pressure N2 sorption isotherm (SABET=408.7(2) m2 g−1, 77 K). SC-SC sorption of N2, CO2, Xe, and AcMe by p -G2BDS is explored under various conditions and X-ray diffraction provides a measurement of the high-pressure, room temperature Xe and CO2 sorption isotherms. Though p -G2BDS is formally metastable relative to the “collapsed”, nonporous polymorph, np -G2BDS , a sample of p -G2BDS survived for almost two decades under ambient conditions. np -G2BDS reverts to zCO2@ p -G2BDS or yXe@ p -G2BDS (y,z=variable) when pressure of CO2 or Xe, respectively, is applied. |
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| Keywords: | Gassorption Guanidiniumsulfonate Poröse molekulare Festkörper Porosität Wasserstoffverbrückte organische Gerüste |
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