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Interaction of a Polymer of Intrinsic Microporosity (PIM-1) with Penetrants

Received: 21 May 2015     Accepted: 1 June 2015     Published: 16 June 2015
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Abstract

The characterisation, solubility testing, and alcohol adsorption studies of PIM-1 are reported. Techniques used for characterisation are N2 sorption and ATR-FTIR analysis. A number of solvents were tested for their ability to dissolve low molecular weight (~30 000 gmol-1), medium molecular weight (~60 000 gmol-1), and high molecular weight (~120 000 gmol-1) PIM-1.Results showed solubility of PIM-1 in these solvents to be dependent on molar mass. CHCl3, tetrahydrofuran (THF), CH2Cl2, dicholobenzene (DCB), 1,2,4- trichlorobenzene (TCB), and acetophenone were found to be good solvents at all molecular weights. Treatment of PIM-1 with nonsolvents, namely: small alcohols and water, followed by solvent removal, caused swelling, resulting in an increase in BET surface area of about 11 %, except for water, which reduced BET surface area by the same amount (11 %). Methanol (MeOH) treatment resulted in a new population of micropores around 0.6 nm. The change after ethanol (EtOH) and propanol (PrOH) treatment was not as significant. Hydrogen bonding between alcohols and PIM-1 was also investigated using shifts in the frequencies of FTIR peaks for the ether and the nitrile functional groups. Nitrile group frequencies for the alcohols were consistently blue-shifted, whereas the ether frequencies were red shifted. Both red- and blue-shifts were used as a measure of hydrogen bond strength.

Published in American Journal of Applied Chemistry (Volume 3, Issue 3)
DOI 10.11648/j.ajac.20150303.17
Page(s) 139-146
Creative Commons

This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited.

Copyright

Copyright © The Author(s), 2015. Published by Science Publishing Group

Keywords

PIM-1, Solvents, Alcohols, Hydrogen-Bonding

References
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  • APA Style

    Nhamo Chaukura, Louise Maynard-Atem. (2015). Interaction of a Polymer of Intrinsic Microporosity (PIM-1) with Penetrants. American Journal of Applied Chemistry, 3(3), 139-146. https://doi.org/10.11648/j.ajac.20150303.17

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    Nhamo Chaukura; Louise Maynard-Atem. Interaction of a Polymer of Intrinsic Microporosity (PIM-1) with Penetrants. Am. J. Appl. Chem. 2015, 3(3), 139-146. doi: 10.11648/j.ajac.20150303.17

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    AMA Style

    Nhamo Chaukura, Louise Maynard-Atem. Interaction of a Polymer of Intrinsic Microporosity (PIM-1) with Penetrants. Am J Appl Chem. 2015;3(3):139-146. doi: 10.11648/j.ajac.20150303.17

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  • @article{10.11648/j.ajac.20150303.17,
      author = {Nhamo Chaukura and Louise Maynard-Atem},
      title = {Interaction of a Polymer of Intrinsic Microporosity (PIM-1) with Penetrants},
      journal = {American Journal of Applied Chemistry},
      volume = {3},
      number = {3},
      pages = {139-146},
      doi = {10.11648/j.ajac.20150303.17},
      url = {https://doi.org/10.11648/j.ajac.20150303.17},
      eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ajac.20150303.17},
      abstract = {The characterisation, solubility testing, and alcohol adsorption studies of PIM-1 are reported. Techniques used for characterisation are N2 sorption and ATR-FTIR analysis. A number of solvents were tested for their ability to dissolve low molecular weight (~30 000 gmol-1), medium molecular weight (~60 000 gmol-1), and high molecular weight (~120 000 gmol-1) PIM-1.Results showed solubility of PIM-1 in these solvents to be dependent on molar mass. CHCl3, tetrahydrofuran (THF), CH2Cl2, dicholobenzene (DCB), 1,2,4- trichlorobenzene (TCB), and acetophenone were found to be good solvents at all molecular weights. Treatment of PIM-1 with nonsolvents, namely: small alcohols and water, followed by solvent removal, caused swelling, resulting in an increase in BET surface area of about 11 %, except for water, which reduced BET surface area by the same amount (11 %). Methanol (MeOH) treatment resulted in a new population of micropores around 0.6 nm. The change after ethanol (EtOH) and propanol (PrOH) treatment was not as significant. Hydrogen bonding between alcohols and PIM-1 was also investigated using shifts in the frequencies of FTIR peaks for the ether and the nitrile functional groups. Nitrile group frequencies for the alcohols were consistently blue-shifted, whereas the ether frequencies were red shifted. Both red- and blue-shifts were used as a measure of hydrogen bond strength.},
     year = {2015}
    }
    

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  • TY  - JOUR
    T1  - Interaction of a Polymer of Intrinsic Microporosity (PIM-1) with Penetrants
    AU  - Nhamo Chaukura
    AU  - Louise Maynard-Atem
    Y1  - 2015/06/16
    PY  - 2015
    N1  - https://doi.org/10.11648/j.ajac.20150303.17
    DO  - 10.11648/j.ajac.20150303.17
    T2  - American Journal of Applied Chemistry
    JF  - American Journal of Applied Chemistry
    JO  - American Journal of Applied Chemistry
    SP  - 139
    EP  - 146
    PB  - Science Publishing Group
    SN  - 2330-8745
    UR  - https://doi.org/10.11648/j.ajac.20150303.17
    AB  - The characterisation, solubility testing, and alcohol adsorption studies of PIM-1 are reported. Techniques used for characterisation are N2 sorption and ATR-FTIR analysis. A number of solvents were tested for their ability to dissolve low molecular weight (~30 000 gmol-1), medium molecular weight (~60 000 gmol-1), and high molecular weight (~120 000 gmol-1) PIM-1.Results showed solubility of PIM-1 in these solvents to be dependent on molar mass. CHCl3, tetrahydrofuran (THF), CH2Cl2, dicholobenzene (DCB), 1,2,4- trichlorobenzene (TCB), and acetophenone were found to be good solvents at all molecular weights. Treatment of PIM-1 with nonsolvents, namely: small alcohols and water, followed by solvent removal, caused swelling, resulting in an increase in BET surface area of about 11 %, except for water, which reduced BET surface area by the same amount (11 %). Methanol (MeOH) treatment resulted in a new population of micropores around 0.6 nm. The change after ethanol (EtOH) and propanol (PrOH) treatment was not as significant. Hydrogen bonding between alcohols and PIM-1 was also investigated using shifts in the frequencies of FTIR peaks for the ether and the nitrile functional groups. Nitrile group frequencies for the alcohols were consistently blue-shifted, whereas the ether frequencies were red shifted. Both red- and blue-shifts were used as a measure of hydrogen bond strength.
    VL  - 3
    IS  - 3
    ER  - 

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Author Information
  • Polymer Science & Engineering Department, Harare Institute of Technology, Harare, Zimbabwe

  • School of Chemistry, University of Manchester, Manchester, UK

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