2006
DOI: 10.1021/jp060443a
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Spacer-Controlled Aggregation and Surface Morphology of a Selenacarbocyanine Dye on Gemini Monolayers

Abstract: The adsorption and aggregation of a selenacarbocyanine dye (3,3-disulfopropyl-9-methyl-selenacarbocyanine, SeCy) onto Langmuir monolayers of a series of gemini amphiphiles with different methylene spacers were investigated. When the monolayers of the gemini amphiphiles were spread on the dye-containing subphase, the dye could be easily adsorbed and aggregated onto the monolayers through the electrostatic and pi-pi interaction. The dye formed complexes with gemini amphiphiles and stacked as J-aggregates in all … Show more

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Cited by 33 publications
(31 citation statements)
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“…When the monolayers are compressed, the spacer could adopts bend conformation when it is long enough. [26,27] In addition, we find that when the amphiphiles have short spacer (n < 6), the A L per carbon number between the two charge sites is about 10 Å 2 , which is similar to that of the gemini amphiphiles. [26,27] Analysis of the surface compressibility modulus of monolayers reveals that the monolayers slowly expand with increase of the spacer length.…”
Section: Monolayer Of 2c16nnso 3 At the Air-water Interfacesupporting
confidence: 56%
See 1 more Smart Citation
“…When the monolayers are compressed, the spacer could adopts bend conformation when it is long enough. [26,27] In addition, we find that when the amphiphiles have short spacer (n < 6), the A L per carbon number between the two charge sites is about 10 Å 2 , which is similar to that of the gemini amphiphiles. [26,27] Analysis of the surface compressibility modulus of monolayers reveals that the monolayers slowly expand with increase of the spacer length.…”
Section: Monolayer Of 2c16nnso 3 At the Air-water Interfacesupporting
confidence: 56%
“…[26,27] In addition, we find that when the amphiphiles have short spacer (n < 6), the A L per carbon number between the two charge sites is about 10 Å 2 , which is similar to that of the gemini amphiphiles. [26,27] Analysis of the surface compressibility modulus of monolayers reveals that the monolayers slowly expand with increase of the spacer length. As shown in Figure 4, it is found that the 2C16N2SO 3 monolayer is in liquid-condensed state at high surface pressure (C s À1 values between 100 and 150 Mn=m) while the remaining 2C16 NnSO 3 show liquid-expand charater (12.5 mN=m<C s À1 <50 mN=m).…”
Section: Monolayer Of 2c16nnso 3 At the Air-water Interfacesupporting
confidence: 56%
“…For soluble systems, Gibbs monolayers of mixed cationic-anionic surfactants have been investigated at the air/water interface, while for insoluble systems, Langmuir monolayers of mixed conventional surfactants and other compounds have been reported in the literature [14][15][16][17][18][19][20][21]. In addition, as for mixtures comprising Gemini surfactants, the properties and applications of the soluble surfactants in solution or at interface have been studied, but the behaviors of insoluble monolayers have been explored only in a few works [22][23][24][25][26][27]. However, details of the molecular arrangement-performance relationship of the mixed cationic and anionic surfactant monolayers, especially the cationic Gemini and anionic one, remain to be clarified.…”
Section: Introductionmentioning
confidence: 99%
“…So far, many studies have reported the properties and applications of soluble Gemini surfactants in solution or at interfaces, while only a few papers [19][20][21][22][23][24] have dealt with their insoluble monolayer behavior. The mixed monolayer of cationic Gemini surfactant with methylene spacers and sodium dodecyl sulfate was investigated by Wang and Marques [25].…”
Section: Introductionmentioning
confidence: 99%
“…The mixed monolayer of cationic Gemini surfactant with methylene spacers and sodium dodecyl sulfate was investigated by Wang and Marques [25]. The complex or hybrid films formed by a Gemini amphiphile, a bis-(imidazolium salt) with methylene spacers, with DNA [22], dye [19], inorganic materials [26,27], and TPPS [28] were extensively investigated by Liu and his colleagues. The properties of nonionic Gemini surfactant were studied by Mandal and co-workers [29].…”
Section: Introductionmentioning
confidence: 99%