Tuning the Properties of Dodecylpyridinium Metallosurfactants: The Role of Iron-Based Counterions

Rubčić, Mirta; Herak, Mirta; Ivančić, Ana; Topić, Edi; Beriša, Emma; Bujak, Ivana Tartaro; Domazet Jurašin, Darija (2025) Tuning the Properties of Dodecylpyridinium Metallosurfactants: The Role of Iron-Based Counterions. International Journal of Molecular Sciences, 26 (6). ISSN 1422-0067

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Abstract

Metallosurfactants combine the unique soft-matter properties of surfactants with magnetic functionalities of metal ions. The inclusion of iron-based species, in particular, can further boost the functionality of the material, owing to iron’s ability to adopt multiple oxidation states and form both high-spin and low-spin complexes. Motivated by this, a series of hybrid inorganic-organic dodecylpyridinium metallosurfactants with iron-containing counterions was developed. It was established that using either divalent or trivalent iron halides in a straightforward synthetic procedure yields C12Py-metallosurfactants with distinct complex counterions: (C12Py)2[Fe2X6O] and (C12Py)[FeX4] (X = Cl or Br), respectively. A combination of techniques—including conductometry, dynamic and electrophoretic light scattering, single-crystal and thermogravimetric analysis, and magnetic measurements—provided in-depth insights into their solution and solid-state properties. The presence of different iron-based counterions significantly influences the crystal structure (interdigitated vs. non-interdigitated bilayers), magnetic properties (paramagnetic vs. nonmagnetic singlet ground state), and self-assembly (vesicles vs. micelles) of the dodecylpyridinium series. To our knowledge, this is the first report on the synthesis and characterization of hybrid organic-inorganic metallosurfactants containing the μ-oxo-hexahalo-diferrate anion.

Item Type:	Article
Uncontrolled Keywords:	metallosurfactants; inorganic-organic hybrids; iron complexes; crystal structure; solid-state magnetism; low-dimensional magnets; self-assembly; ionic liquids
Subjects:	NATURAL SCIENCES > Physics > Condensed Matter Physics NATURAL SCIENCES > Chemistry > Physical Chemistry
Divisions:	Division of Materials Chemistry Division of Physical Chemistry
Projects:	Project title Project leader Project code Project type Multifunkcionalne površinski aktivne tvari s prijelaznim metalima: jednostavan put do nanomaterijala i niskodimenzionalnih magneta Darija Domazet Jurašin IP-2024-05-3668 HRZZ Centar izvrsnosti u kemiji - CIuK-CIuK Josip Požar; Mirta Rubčić; Ivana Biljan KK.01.1.1.02.0016 EK Kriogeni centar Instituta za fiziku-KaCIF Nikolina Novosel; Josip Buhin KK.01.1.1.02.0012 EK Osnovna stanja u kompeticiji – jake korelacije, frustracija i nered Damir Starešinić UNSPECIFIED UNSPECIFIED Surface transfer of pathogens, STOP Maja Dutour Sikirić UNSPECIFIED UNSPECIFIED
Depositing User:	Lorena Palameta
Date Deposited:	27 Mar 2025 08:20
URI:	http://fulir.irb.hr/id/eprint/9672
DOI:	10.3390/ijms26062540

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