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A Porous Metal–Organic Framework with Dynamic Pyrimidine Groups Exhibiting Record High Methane Storage Working Capacity

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posted on 30.04.2014, 00:00 by Bin Li, Hui-Min Wen, Hailong Wang, Hui Wu, Madhusudan Tyagi, Taner Yildirim, Wei Zhou, Banglin Chen
We have realized a new porous metal–organic framework UTSA-76a with pyrimidine groups on the linker, exhibiting high volumetric methane uptake of ∼260 cm3 (STP) cm–3 at 298 K and 65 bar, and record high working capacity of ∼200 cm3 (STP) cm–3 (between 5 and 65 bar). Such exceptionally high working capacity is attributed to the central “dynamic” pyrimidine groups within UTSA-76a, which are capable of adjusting their orientations to optimize the methane packing at high pressure, as revealed by computational studies and neutron scattering experiments.