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Behavior of 10-(Perfluorohexyl)-decanol, a Partially Fluorinated Analog of Hexadecanol, at the Air–water Interface by Hans-Joachim Lehmler; Paul M Bummer is a Chemistry article available to read on EtoBox.

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10-(Per ̄uorohexyl)-decanol is a partially ̄uorinated analog of hexadecanol, an important detergent alcohol. With a melting point of T 48:82 8C and a melting enthalpy of DH 53:96 J/g, the intermolecular interactions of the ̄uorinated alcohol are weaker compared to hexadecanol (T 52:67 8C, DH 244:41 J/g). The behavior of this ̄uorinated alcohol at the air±water interface was studied on ®ve different subphases, namely, water, NaCl (150 mM), CaCl 2 (2 mM), HCl (pH 2:0), and urea (0.5 M). Similar to other partially ̄uorinated amphiphiles, the compression isotherms of the ̄uorinated alcohol on all subphases are more expanded compared to the hydrocarbon alcohol with a limiting area of 32±36 A Ê 2 per molecule and a temperature-dependent phase transition at 5.6±8.2 mN/m (37 8C, compression rate of 10 mm/min). The dependence of the compression isotherms of 10-(per ̄uorohexyl)-decanol on subphase composition and temperature follows the trends reported for tetra-and hexadecanol. In particular, a shift to smaller molecular areas with increasing temperatures was observed on all ®ve subphases. The shift to smaller molecular areas on urea indicates that in the case of 10-(per ̄uorohexyl)-de

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Author

Hans-Joachim Lehmler; Paul M Bummer

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0022-1139)

Published

2002

Language

EN

Field

Chemistry (Physical Sciences)