Novel self-assembling system based on resorcinarene and cationic surfactant

Abstract

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.

Aggregation in a Binary System Based on Calix[4]resorcinol with Phosphonium Groups and Hydrophilic Polymers

“…[1][2][3][4][5][6] Формирование смешан-ных композиций на основе вышеперечисленных строи-тельных блоков способно снизить расход реагентов [1,7] и подключить факторы управления морфологией агре-гатов. [8][9][10][11] Бинарные композиции на основе поверхност-но-активных веществ (ПАВ), [12] полимер-коллоидные комплексы [7] и системы ПАВ-каликсарен [8][9][10] неизменно оказываются в фокусе научных исследований. Однако смешанные системы каликсарен-полимер гораздо менее исследованы, [13,14] несмотря на то что полимеры в данном случае могут играть роль матрицы, облегчая процессы самоорганизации.…”

Complexation of 1-Alkyl-4-Aza-1-Azoniabicyclo[2.2.2]Octane Bromides with Transition Metal Cations in Acetone

“…Ранее нами показано, что моноалкили-рованные производные 1,4-диазабицикло[2.2.2]-октана (АД) проявляют высокую агрегационную, каталитическую, биологическая и солюбилиза-ционную активность [12,13]. Использование этих соединений в качестве лигандов и переход к их комплексам с металлами может привести к усилению практически полезных свойств АД.…”

Self-Aggregation and Solubilizing Properties of the Supramolecular System Based on Azobenzenesulfonate Calix[4]arene and CTAB

“…On the other hand, interest in macrocycles is due to the specific geometry of their molecules, which is important in the design of drug delivery systems and the development of antiviral drugs. [18][19][20] In the process of formation of mixed surfactant-calixarene compositions one can observe: (1) the increase in the solubility of macrocyclic compounds; [23] (2) the activation of binding processes of hydrophobic and hydrophilic substrates by monitoring the morphology of mixed aggregates; [13][14][15] (3) the decrease in the critical aggregation concentration. [13] The non-toxicity of calixarenes and surfactants makes them attractive for constructing receptors and carriers in solving biotechnological problems.…”

“…The use of calixarenes and surfactants [13,14,[16][17][18][19][20][21][22] in the creation of superamphiphiles is of particular interest. It is known that macrocycles, thanks to the presence of a molecular cavity and the preorganization of functional groups, are able to participate in guest-host interactions.…”