COF-320

Paper: Single-Crystal Structure of a Covalent Organic Framework

Authors: Y.-B. Zhang, J. Su, H. Furukawa, Y. Yun, F. Gándara, A. Duong, X. Zou, and O. M. Yaghi

Citation: J. Am. Chem. Soc., 2013, 135, 16336-16339

DOI: 10.1021/ja409033p

Abstract: The crystal structure of a new covalent organic framework, termed COF-320, is determined by single-crystal 3D electron diffraction using the rotation electron diffraction (RED) method for data collection. The COF crystals are prepared by an imine condensation of tetra-(4-anilyl)methane and 4,4′-biphenyldialdehyde in 1,4-dioxane at 120 °C to produce a highly porous 9-fold interwoven diamond net. COF-320 exhibits permanent porosity with a Langmuir surface area of 2400 m²/g and a methane total uptake of 15.0 wt % (176 cm³/cm³) at 25 °C and 80 bar. The successful determination of the structure of COF-320 directly from single-crystal samples is an important advance in the development of COF chemistry.