A highly gas permeable polymer with exceptional size selectivityis prepared by fusing triptycene units together via a polymerisation reaction involving Tr�ger's base formation. The extreme rigidity of this polymer of intrinsic microporosity (PIM-Trip-TB) facilitates gas permeability data that lie well above the benchmark 2008 Robeson upper bounds for the important O2/N2 and H2/N2 gas pairs. Indeed, as PIM-Trip-TB is a ladder polymer that is composed of only benzene rings fused together by rigid bridged bicyclic units and contains no groups that can act as rotors, its performance as a molecular sieve is likely to be approaching the optimum achievable for gas separation for a solution processablepolymer.[1] M. Carta, M. Croad, R. Malpass-Evans, J. C. Jansen, P. Bernardo, G. J. Gabriel, K. Friess, M. Lanc and N. B. McKeown, Adv. Mater., 2014, DOI: 10.1002/adma.201305783

Triptycene-based polymers of intrinsic microporosity (PIMs) prepared via Tr�ger's base formation

248th National Meeting (2014)

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