Organometallic Interactions in Porphyrin Systems

Summary

Porphyrins are planar macrocycles characterised by a conjugated tetrapyrrolic framework capable of coordinating a vast array of metal ions within their central cavity. Organometallic interactions in these systems arise from the strong σ-donor and π-acceptor properties of the porphyrin ring, which modulate the redox, photophysical and catalytic behaviour of the bound metal. Tuning of axial ligands and peripheral substituents permits precise control over electron density at the metal centre, leading to tailored activity in processes such as small-molecule activation, electrocatalysis and photochemical energy conversion. Beyond fundamental interest, porphyrin–metal assemblies underpin critical technologies in solar fuel generation, molecular sensing and biomedical imaging owing to their remarkable stability and versatility.

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Organometallic Interactions in Porphyrin Systems publication trend

The graph below shows the total number of articles in organometallic interactions in porphyrin systems across all publications each year (not limited to Nature Index journals).

Technical terms

Porphyrin: A cyclic tetrapyrrole ligand featuring extensive π-conjugation and the ability to chelate metal ions at its centre.

Axial coordination: Binding of ligands perpendicular to the porphyrin plane at the metal site, affecting electronic structure and reactivity.

Turnover frequency (TOF): The number of substrate molecules converted per catalytic site per unit time under defined conditions.

Redox potential: The measure of a species’ tendency to gain electrons and be reduced, crucial for electron-transfer reactions.

π-Conjugation: Delocalisation of π-electrons across interconnected p-orbitals, underpinning optical absorption and charge transport.

References

  1. A Ferrocene-Porphyrin Ligand for Multi-Transduction Chemical Sensor Development. Sensors (2013).

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