ORCID Profile
0000-0003-0166-8937
Current Organisation
UiT Norges arktiske universitet
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Publisher: American Chemical Society (ACS)
Date: 07-02-2019
DOI: 10.1021/ACS.INORGCHEM.8B03391
Abstract: A series of metal-metal bonded osmium corrole dimers, {Os[T pXPC]}
Publisher: American Chemical Society (ACS)
Date: 17-05-2021
Publisher: Springer Science and Business Media LLC
Date: 12-11-2020
DOI: 10.1038/S41598-020-76308-7
Abstract: As part of our efforts to develop rhenium-oxo corroles as photosensitizers for oxygen sensing and photodynamic therapy, we investigated the potential β -perhalogenation of five ReO meso -tris( para -X-phenyl)corroles, Re[T p XPC](O) (X = CF 3 , H, F, CH 3 , and OCH 3 ), with elemental chlorine and bromine. With Cl 2 , β -octachlorinated products Re[Cl 8 T p XPC](O) were rapidly obtained for X = CF 3 , H, and CH 3 , but X = OCH 3 resulted in overchlorination on the meso -aryl groups. Full β -octabromination proved slower relative to Cu and Ir corroles, but the desired Re[Br 8 T p XPC](O) products were finally obtained for X = H and F after a week at room temperature. For X = CH 3 and OCH 3 , these conditions led to undecabrominated products Re[Br 11 T p XPC](O). Compared to the β -unsubstituted starting materials, the β -octahalogenated products were found to exhibit sharp 1 H NMR signals at room temperature, indicating that the aryl groups are locked in place by the β -halogens, and substantially redshifted Soret and Q bands. Single-crystal X-ray structures of Re[Cl 8 T p CF 3 PC](O), Re[Cl 8 T p CH 3 PC](O), and Re[Br 8 T p FPC](O) revealed mild saddling for one Cl 8 structure and the Br 8 structure. These structural variations, however, appear too insignificant to explain the slowness of the β -octabromination protocols, which seems best attributed to the deactivating influence of the high-valent Re center.
Publisher: Royal Society of Chemistry (RSC)
Date: 2017
DOI: 10.1039/C7CC01549F
Abstract: The homoleptic sandwich compounds – Mo and W biscorroles – showcase strong relativistic effects on redox potentials and optical spectra.
Publisher: American Chemical Society (ACS)
Date: 12-07-2023
Publisher: American Chemical Society (ACS)
Date: 17-08-2018
No related grants have been discovered for Abraham Alemayehu.