Central-metal-cation-based modulation of gas adsorption selectivity in porous tetrapyrrolic materials

Subrata Maji; Prachi Gupta; Rob Clowes; Yoshitaka Matsushita; Lok Kumar Shrestha; Anna G. Slater; Jonathan P. Hill; Mandeep K. Chahal

doi:10.1039/D5CC06796K

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Central-metal-cation-based modulation of gas adsorption selectivity in porous tetrapyrrolic materials

Subrata Maji,^a Prachi Gupta,

^b Rob Clowes,^b Yoshitaka Matsushita,

^c Lok Kumar Shrestha,

^a Anna G. Slater,

^b Jonathan P. Hill

^a and Mandeep K. Chahal

*^d

Author affiliations

* Corresponding authors

^a Research Center for Materials Nanoarchitectonics, National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan

^b Department of Chemistry and Materials Innovation Factory, University of Liverpool, Liverpool L69 7ZD, UK

^c Research Network and Facility Services Division, National Institute for Materials Science, 1-2-1 Sengen, Tsukuba, Ibaraki 305-0047, Japan

^d Chemistry and Forensic Science, School of Natural Sciences, University of Kent, CT2 7NH Canterbury, UK
E-mail: m.k.chahal@kent.ac.uk

Abstract

We present a direct strategy to assemble porous tetrapyrrolic materials with tunable gas uptake selectivity by varying the coordinated cation. Co-OX1 shows improved CO₂ uptake of 51.66 cm³ g⁻¹ at 298 K, while free base-OX1 demonstrates a CO₂/N₂ selectivity of 202.9. This approach offers a viable route to CO₂ capture technologies.

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DOI: https://doi.org/10.1039/D5CC06796K
Article type: Communication
Submitted: 29 Nov 2025
Accepted: 09 Feb 2026
First published: 17 Feb 2026
This article is Open Access

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Chem. Commun., 2026, Advance Article

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Central-metal-cation-based modulation of gas adsorption selectivity in porous tetrapyrrolic materials

S. Maji, P. Gupta, R. Clowes, Y. Matsushita, L. K. Shrestha, A. G. Slater, J. P. Hill and M. K. Chahal, Chem. Commun., 2026, Advance Article , DOI: 10.1039/D5CC06796K

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Central-metal-cation-based modulation of gas adsorption selectivity in porous tetrapyrrolic materials

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Central-metal-cation-based modulation of gas adsorption selectivity in porous tetrapyrrolic materials

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