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The CO release properties of κ2 N1,N2 Mn(I) tricarbonyl photoCORMs with tridentate benzimidazole coligands

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Abstract

Fac-[MnBr(L1,22N1,N2)(CO)3] and fac-[MnBr(L3)(CO)3] (1–3) (2,6-bis(benzimidazole-2′-yl)pyridine (L1), 2,6-bis(1-ethyl-benzimidazol-2′-yl)pyridine (L2) and 2-(2-pyridyl)benzimidazole (L3)), capable of CO release upon illumination at 468 nm, were synthesized and fully characterized, including the single crystal X-ray analysis of 1 and 2. The photoCORMs are stable in the dark in DMSO and aqueous buffer under the reducing properties of the myoglobin assay. The κ2N1,N2 bidentate mode of L1,2 ligands changes into meridional, tridentate mode upon illumination as illustrated via solution NMR studies. The influence of the alkylation of benzimidazole ligand on the electronic structure was studied using time dependent density functional theory calculations.

Graphical abstract: The CO release properties of κ2 N1,N2 Mn(i) tricarbonyl photoCORMs with tridentate benzimidazole coligands

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Publication details

The article was received on 06 Jul 2017, accepted on 31 Jul 2017 and first published on 01 Aug 2017


Article type: Research Article
DOI: 10.1039/C7QI00390K
Citation: Inorg. Chem. Front., 2017, Advance Article
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    The CO release properties of κ2 N1,N2 Mn(I) tricarbonyl photoCORMs with tridentate benzimidazole coligands

    A. M. Mansour and A. Friedrich, Inorg. Chem. Front., 2017, Advance Article , DOI: 10.1039/C7QI00390K

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