Jump to main content
Jump to site search

Issue 6, 2020
Previous Article Next Article

Iridium motif linked porphyrins for efficient light-driven hydrogen evolution via triplet state stabilization of porphyrin

Author affiliations

Abstract

Two new iridium motif linked porphyrins, MBPyZnP-Ir and TBPyZnP-Ir are developed for photocatalytic hydrogen evolution (PHE). The tetra-iridium linked one, TBPyZnP-Ir, displayed the highest H2 production rate (ηH2) of 16.12 mmol g−1 h−1 within 5 h of irradiation, which is over 2.73-fold higher than MBPyZnP-Ir (5.90 mmol g−1 h−1) and much higher than their precursors TBPyZnP (0.12 mmol g−1 h−1) and MBPyZnP (0.06 mmol g−1 h−1) without iridium. The superior ηH2 of TBPyZnP-Ir could be explained by the iridium motifs linked to the porphyrin, stabilizing the triplet states of the porphyrin through intramolecular energy transfer; thus enhancing electron transfer from the triplet photo-excited porphyrin moiety to the cobaloxime co-catalyst and consequently proton reduction.

Graphical abstract: Iridium motif linked porphyrins for efficient light-driven hydrogen evolution via triplet state stabilization of porphyrin

Back to tab navigation

Supplementary files

Article information


Submitted
13 Nov 2019
Accepted
28 Dec 2019
First published
30 Dec 2019

J. Mater. Chem. A, 2020,8, 3005-3010
Article type
Paper

Iridium motif linked porphyrins for efficient light-driven hydrogen evolution via triplet state stabilization of porphyrin

D. N. Tritton, G. B. Bodedla, G. Tang, J. Zhao, C. Kwan, K. C. Leung, W. Wong and X. Zhu, J. Mater. Chem. A, 2020, 8, 3005
DOI: 10.1039/C9TA12492F

Social activity

Search articles by author

Spotlight

Advertisements