In:
Journal of Materials Chemistry A, Royal Society of Chemistry (RSC), Vol. 10, No. 8 ( 2022), p. 4440-4445
Abstract:
A T-Ir complex was conjugated to a porphyrin ring via a phenylene linkage to afford a new ZnP-T-Ir photosensitizer which exhibits aggregation-induced emission (AIE) for the T-Ir unit, inhibition of aggregation caused by quenching (ACQ) of the porphyrin unit and an efficient Förster resonance energy transfer (FRET) from the T-Ir energy donor to the porphyrin energy acceptor. The ZnP-T-Ir system exhibits highly efficient cocatalyst-free photocatalytic hydrogen evolution (PHE) with a rate ( η H 2 ) of 1.42 mmol g −1 h −1 , which is 71-fold higher than that of the related control porphyrin, ZnP-T (0.02 mmol g −1 h −1 ) that does not contain the Ir-complex. The high η H 2 of ZnP-T-Ir in cocatalyst-free PHE can be ascribed to the conjugation of the T-Ir moiety along with the synergistic effect of AIE, ACQ inhibition, and FRET, which further led to efficient UV-visible light-harvesting, a longer photoexcited electron lifetime, and thereby a more efficient electron transfer rate from the photoexcited porphyrin to the proton used for water reduction.
Type of Medium:
Online Resource
ISSN:
2050-7488
,
2050-7496
Language:
English
Publisher:
Royal Society of Chemistry (RSC)
Publication Date:
2022
detail.hit.zdb_id:
2702232-8
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