Cell Reports Physical Science (Feb 2020)

Ultrastable Mesoporous Hydrogen-Bonded Organic Framework-Based Fiber Composites toward Mustard Gas Detoxification

  • Kaikai Ma,
  • Peng Li,
  • John H. Xin,
  • Yongwei Chen,
  • Zhijie Chen,
  • Subhadip Goswami,
  • Xiaofeng Liu,
  • Satoshi Kato,
  • Haoyuan Chen,
  • Xuan Zhang,
  • Jiaquan Bai,
  • Megan C. Wasson,
  • Rodrigo R. Maldonado,
  • Randall Q. Snurr,
  • Omar K. Farha

Journal volume & issue
Vol. 1, no. 2
p. 100024

Abstract

Read online

Summary: Creating crystalline porous materials with large pores is typically challenging due to undesired interpenetration, staggered stacking, or weakened framework stability. Here, we report a pore size expansion strategy by “shape-matching” intermolecular π-π stacking interactions in a series of two-dimensional (2D) hydrogen-bonded organic frameworks (HOFs), HOF-10x (x = 0,1,2), self-assembled from pyrene-based tectons with systematic elongation of π-conjugated molecular arms. This strategy successfully avoids interpenetration or staggered stacking and expands the pore size of HOF materials to access mesoporous HOF-102, which features a surface area of ∼2,500 m2/g and the largest pore volume (1.3 cm3/g) to date among all reported HOFs. More importantly, HOF-102 shows significantly enhanced thermal and chemical stability as evidenced by powder X-ray diffraction and N2 isotherms after treatments in challenging conditions. Such stability enables the easy fabrication of a HOF-102/fiber composite for the efficient photochemical detoxification of a mustard gas simulant.