Journal
CHEMISTRY-A EUROPEAN JOURNAL
Volume 27, Issue 3, Pages 939-943Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.202003856
Keywords
charge transfer; conjugated polymers; donor– acceptor systems; exciton splitting; hydrogen production
Categories
Funding
- National Natural Science Foundation of China [21972021, U1905214, 21961142019, 21861130353]
- National Key Technologies R&D Program of China [2018YFA0209301]
- Chang Jiang Scholars Program of China [T2016147]
- 111 Project [D16008]
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Constructing local donor-acceptor architecture and establishing a ternary acceptor-donor-acceptor molecular junction in organic semiconductors can accelerate interface charge transfer, leading to enhanced photocatalytic performance.
Construction of local donor-acceptor architecture is one of the valid means for facilitating the intramolecular charge transfer in organic semiconductors. To further accelerate the interface charge transfer, a ternary acceptor-donor-acceptor (A(1)-D-A(2)) molecular junction is established via gradient nitrogen substituting into the polymer skeleton. Accordingly, the exciton splitting and interface charge transfer could be promptly liberated because of the strong attracting ability of the two different electron acceptors. Both DFT calculations and photoluminescence spectra elucidate the swift charge transfer at the donor-acceptor interface. Consequently, the optimum polymer, N-3-CP, undergoes a remarkable photocatalytic property in terms of hydrogen production with AQY(405 nm)=26.6 % by the rational design of asymmetric molecular junctions on organic semiconductors.
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