Novel self-assembling system based on resorcinarene and cationic surfactant

• Main Authors: Kashapov, Ruslan R., Pashirova, Tatiana N., Kharlamov, Sergey V., Ziganshina, Albina Yu., Ziltsova, Elena P., Lukashenko, Svetlana S., Zakharova, Lucia Ya., Habicher, Wolf D., Latypov, Shamil K., Konovalov, Alexander I.
• Other Authors: Royal Society of Chemistry,
• Format: Article
• Language: English
• Published: Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden 2014
• Subjects: Gegenion; Bindung; wässrige Lösung; Mizelle; Kernspinresonanzspektroskopie; Polyethylenimin; Spektroskopie; organic counterion binding; aggregation properties; molecular capsules; mimetic chemistry; aqueous-solution; micelles; nmr; polyethyleneimine; spectroscopy; recognition; ddc:540; rvk:VA 1120
• Online Access: http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-138802; http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-138802; http://www.qucosa.de/fileadmin/data/qucosa/documents/13880/10.1039c1cp20906j.pdf

Mixed association of calix[4]resorcinarene with ethyl sulfonate groups on the lower rim and dimethylaminomethyl groups on the upper rim (CR) and cationic surfactant 4-aza-1-hexadecyl-azoniabicyclo[2.2.2]octane bromide (DABCO-16) is studied by methods of tensiometry, conductometry, potentiometry and NMR spectroscopy at fixed CR concentration and varied surfactant concentration. Beyond ca. 0.4 mM of DABCO-16, mixed aggregates enriched by CR are proved to be formed due to electrostatic forces, while beyond ca. 5 mM, aggregates enriched by surfactant occur due to the hydrophobic effect. Spectrophotometry monitoring of the solubilization of a hydrophobic dye, Orange OT, demonstrated that only the second type of mixed aggregate enriched by DABCO-16 is capable of binding the organic probe, while the mixed system where the surfactant is a minor component shows no binding capacity towards Orange OT. This finding can be used for the design of nanocontainers with controllable binding/release properties. === Dieser Beitrag ist mit Zustimmung des Rechteinhabers aufgrund einer (DFG-geförderten) Allianz- bzw. Nationallizenz frei zugänglich.