Exploring the 'Goldilocks Zone' of Semiconducting Polymer Photocatalysts by Donor-Acceptor Interactions
| Autor: | Amitava Acharjya, Michael J. Bojdys, Arun Ichangi, Johannes Schmidt, Ranjit Kulkarni, Pavla Eliášová, Yaroslav S. Kochergin, Arne Thomas, Jaroslav Vacek, Dana Schwarz |
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| Rok vydání: | 2018 |
| Předmět: |
chemistry.chemical_classification
Materials science Band gap General Medicine 02 engineering and technology General Chemistry Polymer 010402 general chemistry 021001 nanoscience & nanotechnology 7. Clean energy 01 natural sciences Catalysis 0104 chemical sciences Conjugated microporous polymer Stille reaction chemistry.chemical_compound chemistry Chemical engineering Covalent bond Photocatalysis Water splitting 0210 nano-technology Triazine |
| Zdroj: | Angewandte Chemie International Edition |
| ISSN: | 1433-7851 |
| DOI: | 10.1002/anie.201809702 |
| Popis: | Water splitting using polymer photocatalysts is a key technology to a truly sustainable hydrogen-based energy economy. Synthetic chemists have intuitively tried to enhance photocatalytic activity by tuning the length of π-conjugated domains of their semiconducting polymers, but the increasing flexibility and hydrophobicity of ever-larger organic building blocks leads to adverse effects such as structural collapse and inaccessible catalytic sites. To reach the ideal optical band gap of about 2.3 eV, A library of eight sulfur and nitrogen containing porous polymers (SNPs) with similar geometries but with optical band gaps ranging from 2.07 to 2.60 eV was synthesized using Stille coupling. These polymers combine π-conjugated electron-withdrawing triazine (C3 N3 ) and electron donating, sulfur-containing moieties as covalently bonded donor-acceptor frameworks with permanent porosity. The remarkable optical properties of SNPs enable fluorescence on-off sensing of volatile organic compounds and illustrate intrinsic charge-transfer effects. |
| Databáze: | OpenAIRE |
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