Polymers of Intrinsic Microporosity, particularly the archetypal PIM-1, have attracted much attention as materials for gas separation membranes. Recently we showed that replacing the spirobisindan of PIM-1 with a spirobifluorene (SBF) unit gives a polymer with higher permeability and greater selectivity due to the greater rigidity of the SBF unit.[1] Here we will describe further work based on adding substituents to the SBF unit and report a new PIM with extraordinary CO2 permeability and whose data lie above the Robeson upperbound for the CO2/N2 gas pair, which is of interest for post-combustion carbon capture.  [1]. C. G. Bezzu, M. Carta, A. Tonkins, J. C. Jansen, P. Bernardo, F. Bazzarelli and N. B. McKeown, Adv. Mater., 2012, 24 , 5930.

Spirobifluorene-based polymers of intrinsic microporosity for gas separation membranes

248th National Meeting (2014)

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