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Water Oxidation with Cobalt-Loaded Linear Conjugated Polymer Photocatalysts.

ABSTRACT: The first examples of linear conjugated organic polymer photocatalysts that produce oxygen from water after loading with cobalt and in the presence of an electron scavenger are reported. The oxygen evolution rates, which are higher than for related organic materials, can be rationalized by a combination of the thermodynamic driving force for water oxidation, the light absorption of the polymer, and the aqueous dispersibility of the relatively hydrophilic polymer particles. We also used transient absorption spectroscopy to study the best performing system and we found that fast oxidative quenching of the exciton occurs (picoseconds) in the presence of an electron scavenger, minimizing recombination.

SUBMITTER: Sprick RS

PROVIDER: S-EPMC7589379 | biostudies-literature | 2020 Jun

REPOSITORIES: biostudies-literature

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Water Oxidation with Cobalt-Loaded Linear Conjugated Polymer Photocatalysts.

Sprick Reiner Sebastian RS Chen Zheng Z Cowan Alexander J AJ Bai Yang Y Aitchison Catherine M CM Fang Yuanxing Y Zwijnenburg Martijn A MA Cooper Andrew I AI Wang Xinchen X

Angewandte Chemie (International ed. in English) 20200819 42

The first examples of linear conjugated organic polymer photocatalysts that produce oxygen from water after loading with cobalt and in the presence of an electron scavenger are reported. The oxygen evolution rates, which are higher than for related organic materials, can be rationalized by a combination of the thermodynamic driving force for water oxidation, the light absorption of the polymer, and the aqueous dispersibility of the relatively hydrophilic polymer particles. We also used transient ...[more]

PMID: 32596879

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