Triplet states enable efficient photocatalytic hydrogen evolution in star-shaped truxene-based nanoparticles.

ABSTRACT: We have developed two new star-shaped donor-acceptor oligomers, named TxBT and TxNT, with a truxene donor core and either 2,1,3-benzothiadiazole (BT) or a naphtho[1,2-c:5,6-c']bis[1,2,5]thiadiazole (NT) unit, respectively. Femtosecond transient absorption spectroscopy suggested that both oligomer nanoparticles (NPs) generate long-lived triplet charge-transfer (CT) states following photoexcitation, which undergo reductive quenching by ascorbate. TxNT NPs generate a larger population of reduced species that accumulate and escape recombination compared to TxBT NPs, indicating more efficient charge separation. TxNT NPs show significantly higher hydrogen evolution rate (54 mmol h^-1 g^-1) compared to TxBT NPs, which is comparable to the performance of the most

SUBMITTER: Brnovic A 

PROVIDER: S-EPMC12919666 | biostudies-literature | 2026 Feb

REPOSITORIES: biostudies-literature