20.500.12556/RUL-179692 Tuning the surface activity and micellization of closo-dodecaborate-based dianionic surfactants via linker and counterion selection o understand the impact of alkaline counterions on the self-assembly of atypical dianionic surfactants, we synthesized a series of novel amphiphilic compounds featuring a bulky dianionic head based on closo-dodecaborate and a hydrophobic alkoxy tail connected via short linkers of different complexation ability toward alkaline cations. The synthetic strategy relied on the opening of cyclic oxonium derivatives by activated alcohol, enabling the attachment of hydrophobic chains to the boron cluster framework. The synthesis of novel surfactants with high cationic purity free from contaminating ions or additional inorganic salts is described. Self-assembly of the dodecaborate-based surfactants at the air–water interface and in aqueous solutions was investigated using tensiometry, various NMR spectroscopy techniques, dynamic light scattering, and all-atom MD simulations. Interestingly, despite their dianionic heads, the surfactants form compact monolayers in cases in which efficient binding of counterions to surfactant dianions occurs. MD simulations suggested relatively small surfactant micelles above the critical micelle concentration, which was confirmed by light scattering analysis. There is evidence that their aggregation number and morphology are strongly dependent on counterion immobilization. The mobility of counterions was observed directly by $^7$Li, $^{23}$Na, $^{39}$K, and $^{133}$Cs NMR spectroscopy, which allowed us to understand the binding abilities of linkers and dianionic heads toward counterions. surface activity micellization closo-dodecaborate-based surfactants counterions površinska aktivnost micelizacija surfaktanti na osnovi closo-dodekaborana protiioni true false true Angleški jezik Slovenski jezik Članek v reviji 2026-02-20 12:38:20 2026-02-20 12:38:21 2026-02-21 04:40:48 0000-00-00 00:00:00 2025 0 0 Str. 32650-32661 iss. 48 Vol. 41 9 Dec. 2025 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 544.72 0743-7463 10.1021/acs.langmuir.5c04598 263697923 RAZ_Hleli_Belhssen_2025.pdf RAZ_Hleli_Belhssen_2025.pdf 1 E28390F9F533D1B6C9EE74CFEBA3C9AF a3492ac098c99fb67c2bcb2877c8aa05bc7dc567726fd8310dd3549756c3b5ed 1b5db6c4-0e51-11f1-a1ba-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=228473 https://pubs.acs.org/doi/10.1021/acs.langmuir.5c04598 1 67afa740-0e50-11f1-a1ba-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=228470 Fakulteta za kemijo in kemijsko tehnologijo 0 0 0