Chain orientation and headgroup structure in Langmuir monolayers of stearic acid and metal stearate (Ag, Co, Zn, and Pb) studied by infrared reflection-absorption spectroscopy

The Journal of Chemical Physics
Yuchun WangHuijin Liu

Abstract

The monolayers of stearic acid at the air-water interface on pure water and ion-containing subphases have been studied using infrared reflection-absorption spectroscopy. In the presence of Co(2+), Zn(2+), and Pb(2+), ordered hydrocarbon chains and hexagonal subcell structure remain almost unchanged in comparison with those for the monolayer on pure water at the surface pressure of 20 m/Nm. In the cases of Co(2+) and Zn(2+), the H-bonded monodentate and unsymmetric bidentate chelating structure within the headgroups were formed, and in the case of Pb(2+), three types of structures, bidentate chelating, unsymmetric chelating, and bidentate bridging coordinations, were formed. The hydrocarbon chains in the monolayers are uniaxially oriented at a tilt angle of approximately 0 degrees with respect to the surface normal in contrast to a tilt angle of approximately 20 degrees on pure water surface at 20 m/Nm by the computer simulation of theoretical calculation to experimental data. In the presence of Ag(+), multilayers were developed with the highly ordered hydrocarbon chains in a triclinic subcell structure and a bidentate bridging structure within the headgroups. The multilayers were composed of three monolayers and the hydrocarbon...Continue Reading

Citations

May 31, 2008·Science·Emilie DressaireHoward A Stone
Oct 16, 2013·Angewandte Chemie·Lanka D WickramasingheCláudio N Verani
Sep 25, 2018·Dalton Transactions : an International Journal of Inorganic Chemistry·Cláudio N Verani
Jul 24, 2013·Dalton Transactions : an International Journal of Inorganic Chemistry·Cláudio N VeraniKenneth Kwame Kpogo
Jun 23, 2007·Langmuir : the ACS Journal of Surfaces and Colloids·Xuezhong DuRong Guo
Oct 5, 2019·Langmuir : the ACS Journal of Surfaces and Colloids·Yingmin LiWei Xiong
Jan 24, 2012·Langmuir : the ACS Journal of Surfaces and Colloids·Wei LiuRoger M Leblanc
Oct 14, 2011·The Journal of Physical Chemistry. B·Xianming Kong, Xuezhong Du
Aug 20, 2019·Chemistry of Materials : a Publication of the American Chemical Society·J L PetersD Vanmaekelbergh
Jul 18, 2020·The Journal of Physical Chemistry. B·Rafaela Cristina SanfeliceSabine Beuermann

❮ Previous
Next ❯

Related Feeds

Antifungals (ASM)

An antifungal, also known as an antimycotic medication, is a pharmaceutical fungicide or fungistatic used to treat and prevent mycosis such as athlete's foot, ringworm, candidiasis, cryptococcal meningitis, and others. Discover the latest research on antifungals here.

Antifungals

An antifungal, also known as an antimycotic medication, is a pharmaceutical fungicide or fungistatic used to treat and prevent mycosis such as athlete's foot, ringworm, candidiasis, cryptococcal meningitis, and others. Discover the latest research on antifungals here.