Supramolecular systems formed by calix[4]resorcinarenes and surfactants in chlorophorm

Novel self-assembling system based on resorcinarene and cationic surfactant

“…A few works are available on the mixed surfactant-calixarene systems, which are mainly focused on the catalytic activity. [42][43][44][45][46][47] Our goal is to achieve a better understanding of the factors, which control the mixed solution behavior, including such aspects as variation of aggregative capacity, aggregate properties, as well as the stoichiometry, the strength and the nature of interactions in the case when mixed assembling is realized. Two building blocks are explored, i.e.…”

Synthesis and aggregation properties of novel amino acetals with the calix[4]resorcinol platform

“…Such a pattern is char acteristic of the formation of low polarity associates. 12, 15 The data obtained suggest that calix [4]resorcinols with acetal groups in the aminomethyl fragment, like their simpler aminomethylated analogs, 15 form head to head supramolecular aggregates in chloroform at low concen trations. 1.1 3,7 .1 9,13 .1 15,19 ]octacosa 1(25),3,5,7(28),9,11,13(27),15,17,19(26),21,23 dodecaene (3c) was obtained analogously from calixarene 1c (1.57 g, 2.4 mmol), acetal 2 (1.43 g, 12 mmol), and 30% formalin (1.20 g, 12 mmol 15,17,19(26),21,23 dodecaene (3e) was obtained analogously from calixarene 1e (5 g, 6.07 mmol), acetal 2 (3.61 g, 30.34 mmol), and 30% formalin (3.03 g, 30.34 mmol).…”

“…A plot of the dielectric constant ε vs. the concentration of such compounds becomes nonlinear (its slope changes) because of aggregation occurring at certain points called critical micelle concentra tions (cmc). [13][14][15][16] The parameter ε can be regarded not only as a characteristic of the medium polarity but also as a measure of its ordering. 13 We used this technique for investigation of the self assembly of calix [4]…”

Supramolecular systems of amphiphilic derivatives of calix[4]resorcinarenes and surfactants in chloroform

“…These compounds can react with synthetic surfac tants, such as cetyltrimethylammonium bromide and Triton X 100, to form mixed supramolecular aggregates with high catalytic activity in hydrolysis of p nitrophenyl esters of phosphorus acids. [5][6][7] Interest in processes of self organization in solutions of surfactant mixtures 8 and compounds of complicated molecular architecture has recently increased considerably 1,9,10 primarily due to steady demands of modern nano and biotechnologies for new polyfunctional reagents. Therefore, studies of aggre gation of new amphiphilic derivatives of calix [4]resorcin arene and their interaction with synthetic and natural surfactants seems very urgent.…”

“…The purpose of the present work is to study the aggre gation of a series of amphiphilic CRA modified by carboxymethyl (1), 2 hydroxyethyl (2), methylamino acetal (3), and aminomethyl (4) fragments in the absence and presence of synthetic surfactants (N cetyl N,N di methyl N (2 hydroxyethyl)ammonium bromide (5), Triton X 100 (6)) and natural membrane lipids (phospha tidylcholine (7), sodium deoxycholate (8)) in a medium of the low polarity solvent (chloroform). Permittivity measurements and FT IR spectroscopy served as methods of investigation.…”