Vogel, Anastasia 
ORCID: 0000-0002-4408-8572, forster, Mark, Wilbraham, Liam, Smith, Charlotte, Cowan, Alexander ORCID: 0000-0001-9032-3548, Zwijnenburg, Martijn, Sprick, Seb and Cooper, Andrew I
(2018)
Photocatalytically Active Ladder Polymers.
Faraday Discussions.
Abstract
<p>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[<i>b</i>,<i>d</i>]thiophene (<b>cLaP1</b>) and dibenzo[<i>b</i>,<i>d</i>]thiophene sulfone subunits (<b>cLaP2</b>). The high photocatalytic activity of <b>cLaP1</b> (1307 μmol h<sup>−1</sup> g<sup>−1</sup>) in comparison to <b>cLaP2</b> (18 μmol h<sup>−1</sup> g<sup>−1</sup>) 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, <b>cLaP1</b> has a larger overpotential for proton reduction and thus an increased driving force for the evolution of hydrogen under sacrificial conditions.</p>
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | 7 Affordable and Clean Energy |
| Depositing User: | Symplectic Admin |
| Date Deposited: | 29 Jan 2019 15:48 |
| Last Modified: | 11 Apr 2024 11:08 |
| DOI: | 10.26434/chemrxiv.7381025 |
| Open Access URL: | https://pubs.rsc.org/en/content/articlelanding/201... |
| Related URLs: | |
| URI: | https://livrepository.liverpool.ac.uk/id/eprint/3031968 |
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