Structure-property relationships for covalent triazine-based frameworks : the effect of spacer length on photocatalytic hydrogen evolution from water
Meier, Christian B. and Sprick, Reiner Sebastian and Monti, Adriano and Guiglion, Pierre and Lee, Jet Sing M. and Zwijnenburg, Martijn A. and Cooper, Andrew I. (2017) Structure-property relationships for covalent triazine-based frameworks : the effect of spacer length on photocatalytic hydrogen evolution from water. Polymer, 126. pp. 283-290. ISSN 0032-3861 (https://doi.org/10.1016/j.polymer.2017.04.017)
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Abstract
Covalent triazine-based frameworks (CTFs) are a subclass of conjugated microporous polymers (CMPs) that can be used as organic photocatalysts for photocatalytic hydrogen evolution from water. Seven materials with varied spacer units from phenylene to quarterphenylene were synthesized, either by trifluoromethanesulfonic acid (TfOH) catalysis from nitriles or by Suzuki-Miyaura polycondensation. The photocatalytic performance under visible light of all materials was systematically studied in the presence of a hole-scavenger, showing that both synthesis routes produce CTFs with similar hydrogen evolution rates (HER), but different optical properties. The highest hydrogen evolution rate in the cyclotrimerized series was found for CTF-2 with an apparent quantum yield of 1.6% at 420 nm in a mixture of water and triethanolamine with a platinum co-catalyst. Based on (TD-)DFT calculations, the highest performance was expected for CTF-1 and this discrepancy is explained by a trade-off between increased light absorption and decreased thermodynamic driving force.
ORCID iDs
Meier, Christian B., Sprick, Reiner Sebastian ORCID: https://orcid.org/0000-0002-5389-2706, Monti, Adriano, Guiglion, Pierre, Lee, Jet Sing M., Zwijnenburg, Martijn A. and Cooper, Andrew I.;-
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Item type: Article ID code: 74274 Dates: DateEvent22 September 2017Published5 April 2017AcceptedSubjects: Science > Chemistry Department: Faculty of Science > Pure and Applied Chemistry Depositing user: Pure Administrator Date deposited: 15 Oct 2020 12:59 Last modified: 23 Nov 2024 06:00 Related URLs: URI: https://strathprints.strath.ac.uk/id/eprint/74274