Nature Communications paper on molecular sieve membranes 19 September 2014 Controlled thermal oxidative crosslinking of polymers of intrinsic microporosity towards tunable molecular sieve membranesQilei Song, Shuai Cao, Robyn H Pritchard, Behnam Ghalei, Shaheen A Al-Muhtaseb, Eugene M Terentjev, Anthony K Cheetham, Easan SivaniahNature Communications5 2014