Issue 40, 2021

Robust pyridylbenzoate metal–organic frameworks as sorbents for volatile solvents and gases

Abstract

Two activated isostructural porous compounds, [Co(34pba)(44pba)]n (1d) and [Zn(34pba)(44pba)]n (2d) (where 34pba is 3-(pyridin-4-yl)benzoate, 44pba is 4-(pyridin-4-yl)benzoate, and d indicates the activated phase) were used for the adsorption of halogenated volatile organic compounds (VOCs), iodine, carbon dioxide (CO2), and hydrogen. Elucidation of single-crystal structures found that the desolvated phases 1d and 2d show rotational disorder of one ring on each linker. The crystal structure of {[Co(34pba)(44pba)]·1.6 I2}n (1dI2) was obtained by vapour sorption of iodine into 1d, and this could be desolvated to a phase isostructural with 1d. Thus the MOF is robust to cycling through sorption/desorption processes with an accompanying order/disorder phase transition. Activation energies for the desorption of dichloromethane, dibromomethane, and iodine were measured as 70, 60, and 77 kJ mol−1 respectively. Both activated compounds were tested as gas sorbents, with 1d showing higher adsorption capacity than 2d for both carbon dioxide and hydrogen.

Graphical abstract: Robust pyridylbenzoate metal–organic frameworks as sorbents for volatile solvents and gases

Supplementary files

Article information

Article type
Paper
Submitted
09 8 2021
Accepted
20 9 2021
First published
21 9 2021
This article is Open Access
Creative Commons BY-NC license

CrystEngComm, 2021,23, 7162-7170

Robust pyridylbenzoate metal–organic frameworks as sorbents for volatile solvents and gases

C. A. Ndamyabera, N. Chatterjee, C. L. Oliver and S. A. Bourne, CrystEngComm, 2021, 23, 7162 DOI: 10.1039/D1CE01052B

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