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Redox and coordination chemistry of diguanidino-benzene ligands with crown ether functions as secondary coordination spheres

In this work, we report the synthesis and characterization of new redox-active tetraguanidine ligands with crown ether functions as secondary coordination spheres, namely a 2,3,12,13-tetraguanidino-dibenzo-18-crown-6 and two 2,3,16,17-tetraguanidino-dibenzo-24-crown-8 derivatives. Metal ion and orga...

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Main Authors: Haaf, Sebastian (Author) , Henel, Carmen L. M. (Author) , Kreis, Franka (Author) , Bruttel, Melanie (Author) , Kaifer, Elisabeth (Author) , Osterbrink, Johanna (Author) , Hübner, Olaf (Author) , Himmel, Hans-Jörg (Author)
Format: Article (Journal)
Language:English
Published: May 31, 2024
In: European journal of inorganic chemistry
Year: 2024, Volume: 27, Issue: 23, Pages: 1-19
ISSN:1099-0682
DOI:10.1002/ejic.202400299
Online Access:Verlag, kostenfrei, Volltext: https://doi.org/10.1002/ejic.202400299
Verlag, kostenfrei, Volltext: https://onlinelibrary.wiley.com/doi/abs/10.1002/ejic.202400299
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Author Notes:Sebastian Haaf, Carmen L.M. Henel, Franka Kreis, Melanie Bruttel, Elisabeth Kaifer, Johanna Osterbrink, Olaf Hübner, and Hans-Jörg Himmel
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Summary:In this work, we report the synthesis and characterization of new redox-active tetraguanidine ligands with crown ether functions as secondary coordination spheres, namely a 2,3,12,13-tetraguanidino-dibenzo-18-crown-6 and two 2,3,16,17-tetraguanidino-dibenzo-24-crown-8 derivatives. Metal ion and organic cation coordination to the secondary crown ether coordination sphere is studied and its effect on the electronic structures and redox properties analysed. Then, the coordination and redox chemistry of di- and tetraguanidine ligands with crown-ether functions is evaluated. Copper and cobalt complexes with the metals bound to the guanidino functions are prepared. Especially, the redox chemistry of CoII cobalt complexes with and without metal ion encapsulation to the crown ether function is compared. The results contribute to the development of a supramolecular chemistry with redox-active guanidine ligands.
Item Description:Online veröffentlicht: 31. Mai 2024, Artikelversion: 12. Juli 2024
Gesehen am 10.12.2024
Physical Description:Online Resource
ISSN:1099-0682
DOI:10.1002/ejic.202400299

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