TY - JOUR
T1 - Enhanced cocatalyst-free photocatalytic H2 evolution by the synergistic AIE and FRET for an Ir-complex conjugated porphyrin
AU - Zheng, Kailin
AU - Bodedla, Govardhana Babu
AU - Hou, Yuqi
AU - Zhang, Jie
AU - Liang, Runhui
AU - Zhao, Jianzhang
AU - Lee Phillips, David
AU - Zhu, Xunjin
N1 - Funding Information:
The research was supported by the General Research Fund (HKBU 12304320) from the Hong Kong Research Grants Council and the Initiation Grant for Faculty Niche Research Areas (IG-FNRA) (2020/21)-RC-FNRA-IG/20-21/SCI/06 from the Research Committee of Hong Kong Baptist University.
Publisher Copyright:
© The Royal Society of Chemistry 2022
PY - 2022/2/28
Y1 - 2022/2/28
N2 - 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 (ηH2) 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 ηH2 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.
AB - 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 (ηH2) 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 ηH2 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.
UR - http://www.scopus.com/inward/record.url?scp=85125486516&partnerID=8YFLogxK
U2 - 10.1039/d1ta10294j
DO - 10.1039/d1ta10294j
M3 - Journal article
AN - SCOPUS:85125486516
SN - 2050-7488
VL - 10
SP - 4440
EP - 4445
JO - Journal of Materials Chemistry A
JF - Journal of Materials Chemistry A
IS - 8
ER -