Journal
SUSTAINABLE ENERGY & FUELS
Volume 4, Issue 6, Pages 2675-2679Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/d0se00356e
Keywords
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Funding
- Hong Kong Research Grants Council [HKBU 22304115-ECS]
- Hong Kong Baptist University [FRG2-16-17-024, FRG2-17-18-068]
- Inter-institutional Collaborative Research Scheme [RC-ICRS/15-16/02E, RC-ICRS/1617/02C-CHE, RC-ICRS-18-19-01A]
- Interdisciplinary Research Matching Scheme [RC-IRMS/16/17/02CHEM]
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More efficient intramolecular energy transfer in the naphthalimide-porphyrin complex, ZnT(p-NI)TP, is accomplished by an electron rich coplanar thiophene pi-linkage compared to the analogous porphyrin ZnT(p-NI)PP bearing a less coplanar phenylene pi-linker. As a result, ZnT(p-NI)TP shows enhanced light-harvesting ability, electron lifetime and photoinduced charge carrier separation compared to ZnT(p-NI)PP and this boosted electron transfer from the photoexcited porphyrin moiety to the proton reduction catalyst, consequently, resulting in a 2.9 fold higher hydrogen evolution rate (eta H-2) of ZnT(p-NI)TP (4.28 mmol g(-1) h(-1)) than ZnT(p-NI)PP (1.50 mmol g(-1) h(-1)). ZnT(p-NI)TP is also much more photostable than ZnT(p-NI)PP and continued to show hydrogen evolution for up to 50 h.
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