Solvent-dependent self-assembly of an amphiphilic copper(II) complex with bulky head groups

DOI zum Zitieren der Version auf EPub Bayreuth: https://doi.org/10.15495/EPub_UBT_00007128
URN to cite this document: urn:nbn:de:bvb:703-epub-7128-8

Title data

Schreck, Constantin ; Weihermüller, Johannes ; Thoma, Peter ; Rosenfeldt, Sabine ; Drechsler, Markus ; Förster, Christoph ; Heinze, Katja ; Hörner, Gerald ; Weber, Birgit:
Solvent-dependent self-assembly of an amphiphilic copper(II) complex with bulky head groups.
In: European Journal of Inorganic Chemistry. Vol. 2022 (2022) Issue 27 . - No. e202200341.
ISSN 1099-0682
DOI der Verlagsversion: https://doi.org/10.1002/ejic.202200341

	Format: PDF Name: Eur J Inorg Chem - 2022 - Schreck - Solvent‐Dependent Self‐Assembly of an Amphiphilic Copper II Complex with Bulky Head.pdf Version: Published Version Available under License Creative Commons BY 4.0: Attribution
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Abstract

The aggregation behavior of an amphiphilic copper(II) complex was studied in solution by means of UV-Vis and EPR spectroscopy. While dilute solutions in polar media do not give indication of relevant intermolecular interactions, concentrated solutions in nonpolar media clearly do not reflect the molecular properties of [CuL] (H 2 L : N 2 O 2 ligand of the Jäger-type with bulky head-group and long alkoxy tailing). Massive broadening of EPR-lines is prevalent in non-polar media, such as n -heptane and iso -octane. In combination with DFT-modelling, the solvent-dependence of the EPR response (line widths and Cu-hyperfine coupling) could be associated with the formation of oligomers with weak anti-ferromagnetically coupled copper centers. Weak anti-ferromagnetic coupling becomes evident also by SQUID magnetometry at T < 10 K of solid samples of [CuL] . The tendency towards supramolecular aggregation is unequivocally shown by electron microscopy of dried (TEM) and frozen samples (cryo-TEM). While the former approach gives evidence of the formation of extended 2D sheet-like structures with extensions on the micrometer scale, the latter technique identifies the formation of 1D thread-like structures with lengths of several hundred nanometers.

Further data

Item Type:	Article in a journal
Keywords:	Aggregation; Amphiphilic complexes; Copper; Magnetism; Self-assembly
DDC Subjects:	500 Science > 540 Chemistry
Institutions of the University:	Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Former Professors > Chair Inorganic Chemistry IV - Univ.-Prof. Dr. Birgit Weber Faculties Faculties > Faculty of Biology, Chemistry and Earth Sciences Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Inorganic Chemistry IV Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Former Professors
Language:	English
Originates at UBT:	Yes
URN:	urn:nbn:de:bvb:703-epub-7128-8
Date Deposited:	20 Jul 2023 04:57
Last Modified:	20 Jul 2023 04:58
URI:	https://epub.uni-bayreuth.de/id/eprint/7128

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