Vogel, A;
Forster, M;
Wilbraham, L;
Smith, C;
Cowan, A;
Zwijnenburg, MA;
Sprick, RSS;
(2019)
Photocatalytically Active Ladder Polymers.
Faraday Discussions
10.1039/C8FD00197A.
(In press).
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Abstract
Conjugated ladder polymers (cLaPs) are introduced as organic semiconductors for photocatalytic hydrogen evolution from water under sacrificial conditions. Starting from a linear conjugated polymer (cLiP1), two ladder polymers are synthesized via post-polymerization annulation and oxidation techniques to generate rigidified, planarized materials bearing dibenzo[b,d]thiophene (cLaP1) and dibenzo[b,d]thiophene sulfone subunits (cLaP2). The high photocatalytic activity of cLaP1 (1307 μmol h−1 g−1) in comparison to cLaP2 (18 μmol h−1 g−1) under broadband illumination (λ > 295 nm) in presence of a hole-scavenger is attributed to a higher yield of long-lived charges (µs–ms timescale), as evidenced by transient absorption spectroscopy. Additionally, cLaP1 has a larger overpotential for proton reduction and thus an increased driving force for the evolution of hydrogen under sacrificial conditions.
| Type: | Article |
|---|---|
| Title: | Photocatalytically Active Ladder Polymers |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1039/C8FD00197A |
| Publisher version: | https://doi.org/10.1039/C8FD00197A |
| Language: | English |
| Additional information: | © The Royal Society of Chemistry 2019. This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. Material from this article can be used in other publications provided that the correct acknowledgement is given with the reproduced material. |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Chemistry |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10066714 |
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