恭喜博士生蔡尤烈，HOF气体分离工作发表在Angew. Chem.上。
论文信息：
Pore Modulation of Hydrogen−Bonded Organic Frameworks for Efficient Separation of Propylene
Authors: Youlie Cai, Junkuo Gao*, Jing-Hong Li, Puxu Liu, Yanchun Zheng, Wei Zhou, Hui Wu, Libo Li*, Rui-Biao Lin*, Banglin Chen*
Abstract: Developing hydrogen-bonded organic frameworks (HOFs) that combine functional sites, size control, and storage capability for targeting gas molecule capture is a novel and challenging venture. However, there is a lack of effective strategies to tune the hydrogen−bonded network to achieve high-performance HOFs. Here, a series of HOFs termed as HOF-ZSTU-M (M = 1, 2, and 3) with different pore structures are obtained by introducing structure-directing agents (SDAs) into the hydrogen-bonding network of tetrakis (4-carboxyphenyl) porphyrin (TCPP). These HOFs have distinct space configurations with pore channels ranging from discrete to continuous multi-dimensional. Single-crystal X-ray diffraction (SCXRD) analysis reveals a rare diversity of hydrogen−bonding models dominated by SDAs. HOF-ZSTU-2, which forms a strong layered hydrogen−bonding network with ammonium (NH4+) through multiple carboxyl groups, has a suitable 1D "pearl-chain” channel for the selective capture of propylene (C3H6). At 298 K and 1 bar, the C3H6 storage density of HOF-ZSTU-2 reaches 0.6 kg L-1, representing one of the best C3H6 storage materials, while offering a propylene/propane (C3H6/C3H8) selectivity of 12.2. Theoretical calculations and in-situ SCXRD provide a detailed analysis of the binding strength of C3H6 at different locations in the pearl-chain channel. Dynamic breakthrough tests confirm that HOF-ZSTU-2 can effectively separate C3H6 from multi-mixtures.
Link: https://doi.org/10.1002/anie.202308579