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Raman studies of cation–surfactant interactions in alkylpolyoxyethylene surfactant aqueous solutions
Author(s) -
Siew Diana C. W.,
Cooney Ralph P.,
Taylor Michael J.
Publication year - 1991
Publication title -
journal of raman spectroscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.748
H-Index - 110
eISSN - 1097-4555
pISSN - 0377-0486
DOI - 10.1002/jrs.1250220308
Subject(s) - pulmonary surfactant , raman spectroscopy , chemistry , alkali metal , aqueous solution , alkyl , halide , ionic bonding , conformational isomerism , inorganic chemistry , crystallography , ion , organic chemistry , molecule , biochemistry , physics , optics
Raman studies are reported of conformational change in an alkyl polyoxyethylene non‐ionic surfactant associated with coordination to alkali and alkaline earth metal cations. This surfactant has a simpler mix of conformers (with TTT relatively unimportant) compared with non‐ionic surfactants incorporating an aromatic ring in the hydrophobic head‐group. This relatively simple conformational pattern facilitates the interpretation of the 868 cm −1 band assigned to a TGTTḠT (T, trans ; G, gauche ; Ḡ, gauche minus) for the OCH 2 CH 2 OCH 2 CH 2 O polyoxyethylene sequence associated with surfactant‐cation complexes. Counter anions such as halides appeared to have a negligible effect on complex formation.