Photocatalytically active ladder polymers.

Vogel, Anastasia ORCID: 0000-0002-4408-8572, Forster, Mark ORCID: 0000-0002-8077-7690, Wilbraham, Liam, Smith, Charlotte L, Cowan, Alexander J ORCID: 0000-0001-9032-3548, Zwijnenburg, Martijn A, Sprick, Reiner Sebastian and Cooper, Andrew I ORCID: 0000-0003-0201-1021 (2019) Photocatalytically active ladder polymers. Faraday discussions, 215. pp. 84-97.

Access the full-text of this item by clicking on the Open Access link.

Official URL: http://dx.doi.org/10.1039/c8fd00197a

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 that of cLaP2 (18 μmol h-1 g-1) under broadband illumination (λ > 295 nm) in the presence of a hole-scavenger is attributed to a higher yield of long-lived charges (μs to 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.

Item Type:	Article
Uncontrolled Keywords:	7 Affordable and Clean Energy
Depositing User:	Symplectic Admin
Date Deposited:	08 May 2019 10:30
Last Modified:	14 Mar 2024 18:13
DOI:	10.1039/c8fd00197a
Open Access URL:	http://doi.org/10.1039/C8FD00197A
Related URLs:	Author Publisher
URI:	https://livrepository.liverpool.ac.uk/id/eprint/3040253