We study the effects of addition of the macrocyclic cage CESTO (5,12,17-trimethyl-1,5,9,12,17-pentaazabicyclo (7.5.5)nonadecane) on the aggregation behaviour of lithium dodecylsulphate (LDS) in aqueous solution at a pH approximately=12.7. At this pH CESTO is neutral and binds selectively Li counter-ion. Electron spin-echo modulation results show that CESTO interacts with LDS micelles by decreasing the amount of water at the LDS polar headgroups region. Small-angle neutron scattering shows that LDS forms micelles of quasi-spherical shape. Upon addition of CESTO to 1% LDS micellar solution (1/1 mole ratio) we observed a dramatic lowering of the micellar charge, a small growth of the aggregation number, and increased elongation of micelles.

Structure and aggregation of lithium dodecylsulfate micellar solutions in the presence of a macrocyclic cage / Baglioni, Piero; Bencini, Andrea; Dei, Luigi; Gambi, CECILIA MARIA CRISTINA; LO NOSTRO, Pierandrea; Chen, S. H.; Liu, Y. C.; Teixeira, J.; Kevan, L.. - In: JOURNAL OF PHYSICS. CONDENSED MATTER. - ISSN 0953-8984. - STAMPA. - 6:(1994), pp. A369-A373. [10.1088/0953-8984/6/23A/061]

Structure and aggregation of lithium dodecylsulfate micellar solutions in the presence of a macrocyclic cage

BAGLIONI, PIERO;BENCINI, ANDREA;DEI, LUIGI;GAMBI, CECILIA MARIA CRISTINA;LO NOSTRO, PIERANDREA;
1994

Abstract

We study the effects of addition of the macrocyclic cage CESTO (5,12,17-trimethyl-1,5,9,12,17-pentaazabicyclo (7.5.5)nonadecane) on the aggregation behaviour of lithium dodecylsulphate (LDS) in aqueous solution at a pH approximately=12.7. At this pH CESTO is neutral and binds selectively Li counter-ion. Electron spin-echo modulation results show that CESTO interacts with LDS micelles by decreasing the amount of water at the LDS polar headgroups region. Small-angle neutron scattering shows that LDS forms micelles of quasi-spherical shape. Upon addition of CESTO to 1% LDS micellar solution (1/1 mole ratio) we observed a dramatic lowering of the micellar charge, a small growth of the aggregation number, and increased elongation of micelles.
1994
6
A369
A373
Baglioni, Piero; Bencini, Andrea; Dei, Luigi; Gambi, CECILIA MARIA CRISTINA; LO NOSTRO, Pierandrea; Chen, S. H.; Liu, Y. C.; Teixeira, J.; Kevan, L....espandi
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Utilizza questo identificatore per citare o creare un link a questa risorsa: https://hdl.handle.net/2158/212980
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