Issue 6, 2021

Pyrene-containing conjugated organic microporous polymers for photocatalytic hydrogen evolution from water

Abstract

Photoactive conjugated microporous polymers (CMPs) are emerging as porous materials capable of mediating the photocatalytic evolution of H2 from water. In this study, we synthesized three pyrene-based CMPs (Py–F-CMP, Py–TPA-CMP, Py–TPE-CMP) through Sonogashira–Hagihara cross-couplings of 1,3,6,8-tetraethynylpyrene (Py–T, as a common monomer building block) with 2,7-dibromo-9H-fluorene (F–Br2), tris(4-bromophenyl)amine (TPA–Br3), and 1,1,2,2-tetrakis(4-bromophenyl)ethene (TPE–Br4), respectively, in the presence of Pd(PPh3)4 in DMF/Et3N. We then characterized the chemical structures, crystallinities, thermal stabilities, surface morphologies, and porosities of these three new CMPs. Brunauer–Emmett–Teller (BET) analyses and tests of photocatalytic H2 production revealed that Py–TPA-CMP displayed the highest BET surface area (454 m2 g−1), highest total pore volume (0.28 cm3 g−1), highest H2 evolution rate (19 200 μmol h−1 g−1), and highest apparent quantum yield (15.3%) when compared with those of Py–F-CMP, Py–TPE-CMP, and other organic porous materials.

Graphical abstract: Pyrene-containing conjugated organic microporous polymers for photocatalytic hydrogen evolution from water

Supplementary files

Article information

Article type
Paper
Submitted
30 Dec. 2020
Accepted
20 Janv. 2021
First published
20 Janv. 2021

Catal. Sci. Technol., 2021,11, 2229-2241

Pyrene-containing conjugated organic microporous polymers for photocatalytic hydrogen evolution from water

M. G. Mohamed, M. H. Elsayed, A. M. Elewa, A. F. M. EL-Mahdy, C. Yang, A. A. K. Mohammed, H. Chou and S. Kuo, Catal. Sci. Technol., 2021, 11, 2229 DOI: 10.1039/D0CY02482A

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