Highly selective adsorption of ethylene over ethane in a MOF featuring the combination of open metal site and π-complexation

Yiming Zhang; Baiyan Li; Rajamani Krishna; Zili Wu; Dingxuan Ma; Zhan Shi; Tony Pham; Katherine Forrest; Brian Space; Shengqian Ma

doi:10.1039/C4CC09774B

Highly selective adsorption of ethylene over ethane in a MOF featuring the combination of open metal site and π-complexation†

Yiming Zhang,^a Baiyan Li,*^ab Rajamani Krishna,^c Zili Wu,^d Dingxuan Ma,^b Zhan Shi,^b Tony Pham,^a Katherine Forrest,^a Brian Space^a and Shengqian Ma*^a

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^a Department of Chemistry, University of South Florida, 4202 E. Fowler Avenue, Tampa, FL 33620, USA
E-mail: sqma@usf.edu, libaiyan@gmail.com
Fax: +1-813-974-3203
Tel: +1-813-974-5217

^b State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun 130012, People's Republic of China

^c Van't Hoff Institute for Molecular Sciences, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, Netherlands

^d Center for Nanophase Materials Science and Chemical Science Division, Oak Ridge National Laboratory, TN 37831, USA

Abstract

The introduction of the combination of open metal site (OMS) and π-complexation into MOF has led to very high ethylene–ethane adsorption selectivity at 318 K, as illustrated in the context of MIL-101–Cr–SO₃Ag. The interactions with ethylene from both OMS and π-complexation in MIL-101–Cr–SO₃Ag have been investigated by in situ IR spectroscopic studies and computational calculations, which suggest that π-complexation contributes dominantly to the high ethylene–ethane adsorption selectivity.

Chemical Communications

Highly selective adsorption of ethylene over ethane in a MOF featuring the combination of open metal site and π-complexation†

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Highly selective adsorption of ethylene over ethane in a MOF featuring the combination of open metal site and π-complexation

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