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Reversible switching between highly porous and non-porous phases of an interpenetrated diamondoid coordination network that exhibits gate-opening at methane storage pressures
Yang, Qing‐Yuan; Lama, Prem; Sen, Susan; Lusi, Matteo; Chen, Kai-Jie; Gao, Wen-Yang; Shivanna, Mohana; Pham, Tony; Hosono, Nobuhiko; Kusaka, Shinpei; Perry, John J.; Ma, Shengqian; Space, Brian; Barbour, Leonard J.; Kitagawa, Susumu; Zaworotko, Michael J.
The full text of this article will not be available in ULIR until the embago expires on the 25/03/2019 Herein, we report that a new flexible coordination network, NiL2 (L=4‐(4‐pyridyl)‐biphenyl‐4‐carboxylic acid), with diamondoid topology switches between non‐porous (closed) and several porous (open) phases at specific CO2 and CH4 pressures. These phases are manifested by multi‐step low‐pressure isotherms for CO2 or a single‐step high‐pressure isotherm for CH4. The potential methane working capacity of NiL2 approaches that of compressed natural gas but at much lower pressures. The guest‐induced phase transitions of NiL2 were studied by single‐crystal XRD, in situ variable pressure powder XRD, synchrotron powder XRD, pressure‐gradient differential scanning calorimetry (P‐DSC), and molecular modeling. The detailed structural information provides insight into the extreme flexibility of NiL2. Specifically, the extended linker ligand, L, undergoes ligand contortion and interactions between interpenetrated networks or sorbate–sorbent interactions enable the observed switching.
Keyword(s): flexible microporous materials; switching; stepped adsorption isotherm; contortion 4; methane storage
Publication Date:
Type: Journal article
Peer-Reviewed: Yes
Language(s): English
Institution: University of Limerick
Funder(s): Science Foundation Ireland
Citation(s): Angewandte Chemie;54, pp. 7042-7045
Publisher(s): Wiley and Sons Ltd
First Indexed: 2018-07-08 06:34:52 Last Updated: 2018-07-08 06:34:52