Significant Enhancement of C2 H2 /C2 H4 Separation by a Photochromic Diarylethene Unit: A Temperature- and Light-Responsive Separation Switch

Cong Bin Fan; Le Le Gong; Ling Huang; Feng Luo; Rajamani Krishna; Xian Feng Yi; An Min Zheng; Le Zhang; Shou Zhi Pu; Xue Feng Feng; Ming Biao Luo; Guo Cong Guo

doi:10.1002/anie.201702484

Significant Enhancement of C₂ H₂ /C₂ H₄ Separation by a Photochromic Diarylethene Unit: A Temperature- and Light-Responsive Separation Switch

Angew Chem Int Ed Engl. 2017 Jun 26;56(27):7900-7906. doi: 10.1002/anie.201702484. Epub 2017 Apr 24.

Authors

Affiliations

¹ Jiangxi Key Laboratory of Organic Chemistry, Jiangxi Science and Technology Normal University, Nanchang, 330013, China.
² School of Biology, Chemistry and Material Science, East China University of Technology, NanChang, Jiangxi, 344000, China.
³ State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, National Center for Magnetic Resonance in Wuhan, Wuhan Institute of Physics and Mathematics, The Chinese Academy of Sciences, Wuhan, 430071, China.
⁴ Van't Hoff Institute for Molecular Sciences, University of Amsterdam, Science Park 904, 1098 XH, Amsterdam, The Netherlands.
⁵ State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences Fuzhou, Fujian, 350002, China.

PMID: 28436067
DOI: 10.1002/anie.201702484

Abstract

A dual temperature- and light-responsive C₂ H₂ /C₂ H₄ separation switch in a diarylethene metal-organic framework (MOF) is presented. At 195 K and 100 kPa this MOF shows ultrahigh C₂ H₂ /C₂ H₄ selectivity of 47.1, which is almost 21.4 times larger than the corresponding value of 2.2 at 293 K and 100 kPa, or 15.7 times larger than the value of 3.0 for the material under UV at 195 K and 100 kPa. The origin of this unique control in C₂ H₂ /C₂ H₄ selectivity, as unveiled by density functional calculations, is due to a guest discriminatory gate-opening effect from the diarylethene unit.

Keywords: gas separation; metal-organic frameworks; molecular switches; photochromism; selectivity.

Publication types

Research Support, Non-U.S. Gov't