Journal
ACS APPLIED NANO MATERIALS
Volume 3, Issue 7, Pages 7040-7046Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsanm.0c01353
Keywords
porphyrins; naphthalimide-conjugation; self-assembly; heterogeneous catalysis; photocatalytic hydrogen evolution
Funding
- Australia Research Council (ARC) [DP180104010]
- Hong Kong Baptist University [FRG2-17-18-068, RC-ICRS/15-16/02E, RC-ICRS/1617/02C-CHE, RC-ICRS-18-19-01A, RC-IRMS/16/17/02CHEM]
- Hong Kong Research Grants Council [C4006-17G, PolyU 123384/16P]
- Hong Kong Polytechnic University [1-ZE1C]
- Endowed Professorship in Energy [847S]
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A linear 5,15-di(naphthalimide) substituted porphyrin ZnD(p-NI)PP is facilely self-assembled into nanowires in solid with well-defined morphology through the synergistic pi-pi stack interactions of both porphyrin and naphthalimide skeletons. The self-assembled porphyrin nanowires feature broadened light absorption, efficient separation and transfer of photogenerated charges, and enhanced photostability. As a consequence, the ZnD(p-NI)PP produced 108 times higher H-2 production rate (eta H-2 = 5.40 mmol g(-1) h(-1)) than the control 5,15-diphenylporphyrin (ZnDPP) (eta H-2 = 0.05 mmol g(-1) h(-1)) and 3.6-fold higher than the ZnT(p-NI)PP (eta H-2 = 1.50 mmol g(-1)h(-1)) which bears four NI units and self-assembled into nanospheres in the solid. Additionally, the photocatalytic system of ZnD(p-NI)PP produced hydrogen evolution up to 50 h, while the hydrogen evolution of the ZnDPP photocatalytic system reached a plateau after 20 h.
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