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Volumn 102, Issue 1, 1998, Pages 218-222

Effect of chain length on the structure of monolayers of alkyltrimethylammonium bromides (CnTABs) at the air-water interface

Author keywords

[No Author keywords available]

Indexed keywords

AMMONIUM COMPOUNDS; ELLIPSOMETRY; HYDROCARBONS; INTERFACES (MATERIALS); MOLECULAR SPECTROSCOPY; MOLECULAR STRUCTURE; MOLECULES; NEUTRON REFLECTION; SURFACE ACTIVE AGENTS;

EID: 0031703658     PISSN: 15206106     EISSN: None     Source Type: Journal    
DOI: 10.1021/jp972647k     Document Type: Article
Times cited : (65)

References (33)
  • 1
    • 85087252988 scopus 로고    scopus 로고
    • m and is normally determined from the Gibbs equation. The efficiency of adsorption is widely quoted as the concentration of surfactant required to reduce the surface tension by 20 mN/m
    • m and is normally determined from the Gibbs equation. The efficiency of adsorption is widely quoted as the concentration of surfactant required to reduce the surface tension by 20 mN/m.
  • 2
  • 3
    • 0014538327 scopus 로고
    • For example, see: Gillap, W. R.; Weiner, N. D.; Gibaldi, M. J. Phys. Chem. 1968, 72, 2218. Nearn, M. R.; Spaull, A. J. B. Trans. Faraday Soc. 1969, 65, 1785.
    • (1969) Trans. Faraday Soc. , vol.65 , pp. 1785
    • Nearn, M.R.1    Spaull, A.J.B.2
  • 5
    • 11644252617 scopus 로고    scopus 로고
    • note
    • The structure of the monolayer is not the sole determinant of interfacial properties. From a thermodynamic perspective, it is often useful to consider the surface tension and other surface thermodynamic parameters as properties of the whole system, not just of the interface. Many applications of surfactants also involve nonequilibrium conditions where mass transport to the interface plays an important role.
  • 9
    • 33751386396 scopus 로고
    • Simister, E. A.; Thomas, R. K.; Penfold, J.; Aveyard, R.; Binks, B. P.; Cooper, P.; Fletcher, P. D. I.; Lu, J. R.; Sokolowski, A. J. Phys. Chem. 1992, 96, 1383. Lu, J. R.; Simister, E. A.; Thomas, R. K.; Penfold, J. J. Phys. Chem. 1993, 97, 6024.
    • (1993) J. Phys. Chem. , vol.97 , pp. 6024
    • Lu, J.R.1    Simister, E.A.2    Thomas, R.K.3    Penfold, J.4
  • 14
    • 6744248168 scopus 로고
    • Shen, Y. R. Nature (London) 1989, 337, 519. Eisenthal, K. B. Annu. Rev. Phys. Chem. 1992, 43, 627.
    • (1989) Nature (London) , vol.337 , pp. 519
    • Shen, Y.R.1
  • 17
    • 85087252437 scopus 로고    scopus 로고
    • note
    • -1 in the longer chains is experimentally significant. This peak appears at a frequency characteristic of the antisymmetric methylene stretch, but the specific conformation that gives rise to it is not known.
  • 18
    • 11644312880 scopus 로고    scopus 로고
    • note
    • + mode of <5% falls within the limits of error engendered by uncertainty in A.
  • 20
    • 11644270209 scopus 로고    scopus 로고
    • note
    • In this calculation, we used the full expression for 〈βyyz〉 and line strengths obtained from a computer fit to the whole sum-frequency spectrum, but excluded local field effects (see ref 9).
  • 25
    • 85087252710 scopus 로고    scopus 로고
    • note
    • -5 to correct for the effect of the NaBr on the relative permittivity of the subphase. This correction factor was calculated on the assumption that ∈ = 2.0 for the monolayer, but is insensitive to the exact value chosen for ∈. The effect of the temperature dependence of the relative permittivity of water is negligible and has been ignored.
  • 27
    • 11644311540 scopus 로고    scopus 로고
    • note
    • All-trans chains are significantly anisotropic. Conformational disorder will, however, reduce the anisotropy of the chains. Furthermore, a monolayer composed of chains tilted at the magic angle (55°) will be optically isotropic, even though the chains themselves are anisotropic, if the direction of the tilt is random. The mean tilt in these monolayers is close to the magic angle and so any anisotropy will be small.
  • 29
    • 85087251931 scopus 로고    scopus 로고
    • note
    • -3.
  • 31
    • 85087251814 scopus 로고    scopus 로고
    • note
    • 18TAB.
  • 32
    • 85087251976 scopus 로고    scopus 로고
    • note
    • 2) of a deuterated fragment whose intrinsic thickness is negligible compared to w.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.