M-CPOnes: Transition Metal Complexes with Cyclopropenone-Based Ligands for Light-Triggered Carbon Monoxide Release

25 January 2022, Version 1
This content is a preprint and has not undergone peer review at the time of posting.


A new class of CO-releasing molecules, M-CPOnes, was prepared combining cyclopropenone-based ligands for CO release with the modular scaffold of transition metal complexes. In proof-of-concept studies, M-CPOnes based on ZnII, FeII and CoII are stable in the dark but undergo efficient light-triggered CO release with the cyclopropenone substituents and metal ions enabling tuning of the photophysical properties. Furthermore, the choice of metal allows the use of different spectroscopic methods to monitor photodecarbonylation from fluorescence spectroscopy to UV/vis spectroscopy and paramagnetic NMR spectroscopy. The modularity of M CPOnes from the metal ion to the cyclopropenone substitution and potential for further functionalisation of the ligand makes M CPOnes appealing for tailored functionality in applications.


coordination complex
Carbon Monoxide Releasing Molecules

Supplementary materials

Supporting Information
Synthesis and characterisation details


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