Surfactant-polyelectrolyte interactions. 4. Surfactant chain length dependence of the binding of alkylpyridinium cations to dextran sulfate

Malovı́ková, Anna; Hayakawa, Kou; Kwak, Jan C. T.

doi:10.1021/j150654a002

Cited by 175 publications

(150 citation statements)

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(1 reference statement)

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“…The associative phase separation is enhanced as the alkyl chain length of the surfactant increases. This has also been observed for other polymer-surfactant systems and is in line with a lower critical micellar concentration/critical aggregation concentration (CMC/CAC) and a larger surfactant aggregate for longer alkyl chains (12,13). We also observed, as previously reported (14), that a short surfactant like octyltrimethylammonium bromide (OTAB), although able to increase the turbidity of the system ( Figure 3) and hence to form complexes, does not precipitate to a large extent.…”

Section: Dna Displays a Strong Associative Behavior With Cationic Sursupporting

confidence: 82%

DNA-lipid systems: A physical chemistry study

Dias

Antunes

Miguel

et al. 2002

Braz J Med Biol Res

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It is well known that the interaction of polyelectrolytes with oppositely charged surfactants leads to an associative phase separation; however, the phase behavior of DNA and oppositely charged surfactants is more strongly associative than observed in other systems. A precipitate is formed with very low amounts of surfactant and DNA. DNA compaction is a general phenomenon in the presence of multivalent ions and positively charged surfaces; because of the high charge density there are strong attractive ion correlation effects. Techniques like phase diagram determinations, fluorescence microscopy, and ellipsometry were used to study these systems. The interaction between DNA and catanionic mixtures (i.e., mixtures of cationic and anionic surfactants) was also investigated. We observed that DNA compacts and adsorbs onto the surface of positively charged vesicles, and that the addition of an anionic surfactant can release DNA back into solution from a compact globular complex between DNA and the cationic surfactant. Finally, DNA interactions with polycations, chitosans with different chain lengths, were studied by fluorescence microscopy, in vivo transfection assays and cryogenic transmission electron microscopy. The general conclusion is that a chitosan effective in promoting compaction is also efficient in transfection.

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Section: Dna Displays a Strong Associative Behavior With Cationic Sursupporting

confidence: 82%

DNA-lipid systems: A physical chemistry study

Dias

Antunes

Miguel

et al. 2002

Braz J Med Biol Res

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“…While this is the case for C 16 TAB, it is well-known from binding studies that the binding cooperativity of alkyl trimethylammonium surfactants to polyelectrolytes decreases as a function of the tail length. [15] Thus, as we decrease the tail length to ten carbon atoms (as is the case of C 10 TAB), the overall cylindrical micelle lengths will probably also decrease. Therefore, it is possible that a micellar structure consists of spherical micelles or short cylindrical micelles (cubic phases for both cases have been experimentally observed).…”

Section: Discussionmentioning

confidence: 97%

A New Cubic Phase Containing DNA and a Surfactant

2004

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“…In both cases, hydrophobic interactions between the bound surfactant ion play an important role in the overall aggregation process, as is perhaps most clearly shown in 'TO whom correspondence should be addressed. the dependence of the binding constant on the alkyl chain length of the surfactant (5,6).…”

Section: Introductionmentioning

confidence: 99%

Heat capacities and volumes in aqueous polymer and polymer–surfactant solutions

Perron¹,

Francoeur²,

Desnoyers³

et al. 1987

Can. J. Chem.

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. Can. J. Chem. 65, 990 (1987). The apparent molar volumes and heat capacities of aqueous mixtures of neutral polymers and ionic surfactants were measured at 25°C. The polymers chosen were poly(vinylpyrrolidone) (PVP) and poly(ethy1eneoxide) (PEO) and the surfactants were the C8, Clo, and C I 2 homologs of sodium alkylsulfates and the C l o , C12, and C16 homologs of alkyltrimethylammonium bromides. The polymer-surfactant interactions depend on the nature of both components and on the chain length of the surfactant. The thermodynamic properties of the cationic surfactants are essentially the same in the absence and presence of polymer indicating little surfactant-polymer interaction. On the other hand, the thermodynamic properties of anionic surfactants are shifted, upon the addition of polymers, in the direction of enhanced hydrophobic association. The effect increases with the surfactant chain length and with the polymer concentration. The effect is larger with PVP than with PEO.

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Surfactant-polyelectrolyte interactions. 4. Surfactant chain length dependence of the binding of alkylpyridinium cations to dextran sulfate

Cited by 175 publications

References 1 publication

DNA-lipid systems: A physical chemistry study

DNA-lipid systems: A physical chemistry study

A New Cubic Phase Containing DNA and a Surfactant

Heat capacities and volumes in aqueous polymer and polymer–surfactant solutions

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