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

Titelangaben

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. Bd. 2022 (2022) Heft 27 . - e202200341.
ISSN 1099-0682
DOI: https://doi.org/10.1002/ejic.202200341

Volltext

Link zum Volltext (externe URL): Volltext

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.

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Publikationsform: Artikel in einer Zeitschrift
Begutachteter Beitrag: Ja
Keywords: Aggregation; Amphiphilic complexes; Copper; Magnetism; Self-assembly
Institutionen der Universität: Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften > Fachgruppe Chemie > Ehemalige ProfessorInnen > Professur Anorganische Chemie IV - Univ.-Prof. Dr. Birgit Weber
Fakultäten
Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften
Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften > Fachgruppe Chemie
Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften > Fachgruppe Chemie > Professur Anorganische Chemie IV
Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften > Fachgruppe Chemie > Ehemalige ProfessorInnen
Titel an der UBT entstanden: Ja
Themengebiete aus DDC: 500 Naturwissenschaften und Mathematik > 540 Chemie
Eingestellt am: 01 Aug 2022 06:49
Letzte Änderung: 29 Aug 2023 13:40
URI: https://eref.uni-bayreuth.de/id/eprint/71268