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Meso - and axially-modified Ir III triarylcorroles with tunable electrocatalytic properties

Dyes and Pigments, ISSN: 0143-7208, Vol: 175, Page: 108124
2020
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Article Description

The synthesis of three A 2 B type Ir(III)triarylcorroles with meso -aryl substituents that provide electron donating (push) and withdrawing (pull) properties and three A 3 type Ir III triphenylcorroles with differing pyridine axial ligands is reported, along with their structural characterization. An analysis of the structure-property relationships in the optical and redox properties has been carried out by comparing their optical spectroscopy and electrochemistry to trends predicted in DFT and TD-DFT calculations. The results demonstrate that A 2 B type Ir III triarylcorroles are highly efficient electrocatalyzed oxygen reduction reactions (ORRs) and that their reactivity can be modulated by modulating the electronic structure by changing the nature of the meso -substituent at the B-positions, and even axial pyridine ligands.

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