Optimal Binding of Acetylene to a Nitro-Decorated Metal-Organic Framework

Thien D Duong; Sergey A Sapchenko; Ivan da Silva; Harry G W Godfrey; Yongqiang Cheng; Luke L Daemen; Pascal Manuel; Anibal J Ramirez-Cuesta; Sihai Yang; Martin Schröder

doi:10.1021/jacs.8b08504

Optimal Binding of Acetylene to a Nitro-Decorated Metal-Organic Framework

J Am Chem Soc. 2018 Nov 28;140(47):16006-16009. doi: 10.1021/jacs.8b08504. Epub 2018 Nov 13.

Authors

Affiliations

¹ School of Chemistry , University of Manchester , Oxford Road , Manchester M13 9PL , United Kingdom.
² Nikolaev Institute of Inorganic Chemistry , Siberian Branch of the Russian Academy of Sciences , Acad. Lavrentieva Avenue, 3 , 630090 Novosibirsk , Russia.
³ Faculty of Natural Sciences , Novosibirsk State University , Pirogova Street, 2 , 630090 Novosibirsk , Russia.
⁴ ISIS Facility, STFC Rutherford Appleton Laboratory , Chilton , Oxfordshire OX11 0QX , United Kingdom.
⁵ Oak Ridge National Laboratory , Oak Ridge , Tennessee 37831 , United States.

Abstract

We report the first example of crystallographic observation of acetylene binding to -NO₂ groups in a metal-organic framework (MOF). Functionalization of MFM-102 with -NO₂ groups on phenyl groups leads to a 15% reduction in BET surface area in MFM-102-NO₂. However, this is coupled to a 28% increase in acetylene adsorption to 192 cm³ g^-1 at 298 K and 1 bar, comparable to other leading porous materials. Neutron diffraction and inelastic scattering experiments reveal the role of -NO₂ groups, in cooperation with open metal sites, in the binding of acetylene in MFM-102-NO₂.