Design of AIEgen-based porphyrin for efficient heterogeneous photocatalytic hydrogen evolution: Special Collection: Aggregation-Induced Processes and Functions

Govardhana Babu Bodedla, Muhammad Imran, Jianzhang Zhao, Xunjin Zhu*, Wai Yeung Wong*

*Corresponding author for this work

Research output: Contribution to journalJournal articlepeer-review

8 Citations (Scopus)

Abstract

Tetraphenylethylene (TPE)-conjugated porphyrin TPE-ZnPF is synthesized in high yield and characterized by single-crystal X-ray diffraction. The propeller-shaped TPE groups not only enable exceptional aggregation-induced emission (AIE) in the solid state but also abolish the strong π-π stacking of porphyrin moieties and thus prohibit aggregation-caused quenching (ACQ). TPE-ZnPF aggregates feature long-lived photoexcited states, which subsequently suppress non-radiative decay channels and enhance emission intensity. Moreover, its aggregates show more efficient light-harvesting ability due to the Förster resonance energy transfer from the TPE energy donor to the porphyrin core energy acceptor, well-defined nanosphere morphology, and more efficient photoinduced charge separation than the porphyrin Ph-ZnPF, which possesses ACQ and agglomerated morphology. As a result, an excellent photocatalytic hydrogen evolution rate (ηH2) of 56.20 mmol g‒1 h‒1 is recorded for TPE-ZnPF aggregates, which is 94-fold higher than that of the aggregates of Ph-ZnPF (0.60 mmol g‒1 h‒1) without the TPE groups.

Original languageEnglish
Article numbere364
Number of pages8
JournalAggregate
Volume4
Issue number5
Early online date8 Jun 2023
DOIs
Publication statusPublished - Oct 2023

Scopus Subject Areas

  • Chemistry (miscellaneous)
  • Materials Science (miscellaneous)
  • Materials Chemistry
  • Molecular Biology

User-Defined Keywords

  • aggregation-induced emission
  • AIEgen
  • photocatalytic hydrogen evolution
  • porphyrin
  • π-π-stacking

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