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Tuning the gate-opening pressure in a switching pcu coordination network, X-pcu-5-Zn, by pillar ligand substitution

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posted on 2023-01-10, 13:51 authored by Ai-Xin Zhu, Qing‐Yuan Yang, Soumya MukherjeeSoumya Mukherjee, Amrit Kumar, Cheng-Hua Deng, Andrey A. Bezrukov, Mohana Shivanna, MICHAEL ZAWOROTKOMICHAEL ZAWOROTKO
Coordination networks that reversibly switch between closed and open phases are of topical interest since their stepped isotherms can offer higher working capacities for gas‐storage applications than the related rigid porous coordination networks. To be of practical utility, the pressures at which switching occurs, the gate‐opening and gate‐closing pressures, must lie between the storage and delivery pressures. Here we study the effect of linker substitution to fine‐tune gate‐opening and gate‐closing pressure. Specifically, three variants of a previously reported pcu‐topology MOF, X‐pcu‐5‐Zn, have been prepared: X‐pcu‐6‐Zn, 6=1,2‐bis(4‐pyridyl)ethane (bpe), X‐pcu‐7‐Zn, 7=1,2‐bis(4‐pyridyl)acetylene (bpa), and X‐pcu‐8‐Zn, 8=4,4′‐azopyridine (apy). Each exhibited switching isotherms but at different gate‐opening pressures. The N2, CO2, C2H2, and C2H4 adsorption isotherms consistently indicated that the most flexible dipyridyl organic linker, 6, afforded lower gate‐opening and gate‐closing pressures. This simple design principle enables a rational control of the switching behavior in adsorbent materials.


Investigation of the triple mutual system Li, Ba // BO2, F and the growth of bulk crystals of b-BaB2O4

Russian Foundation for Basic Research

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Angewandte Chemie International Edition;58, 50, pp. 18212-18217


Wiley and Sons Ltd



Other Funding information

SFI, National Natural Science Foundation of China


This is the author accepted peer reviewed version of the following article:Tuning the gate-opening pressure in a switching pcu coordination network, X-pcu-5-Zn, by pillar ligand substitution, Angewandte Chemie Interntional Edition, 2019, 58 (50), pp. 18212-18217 which has been published in final form at This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving.



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