A Conformation and Orientation Model of the Carboxylic Group of Fatty Acids Dependent on Chain Length in a Langmuir Monolayer Film Studied by Polarization-Modulation Infrared Reflection Absorption Spectroscopy

2010 ◽  
Vol 114 (35) ◽  
pp. 11496-11501 ◽  
Author(s):  
Maiko Muro ◽  
Yuki Itoh ◽  
Takeshi Hasegawa
Keyword(s):  
Fatty Acids ◽  
Chain Length ◽  
Absorption Spectroscopy ◽  
Langmuir Monolayer ◽  
Polarization Modulation ◽  
Carboxylic Group ◽  
Monolayer Film ◽  
Infrared Reflection Absorption Spectroscopy ◽  
Orientation Model ◽  
Infrared Reflection

Self-Assembled Monolayers Derived from Bidentate Organosulfur Adsorbates

1999 ◽  
Vol 576 ◽  
Author(s):  
Young-Seok Shon ◽  
Nupur Garg ◽  
Ramon Colorado ◽  
Ramon J. Villazana ◽  
T. Randall Lee
Keyword(s):  
Contact Angle ◽  
Chain Length ◽  
Absorption Spectroscopy ◽  
Self Assembled Monolayers ◽  
Polarization Modulation ◽  
Infrared Reflection Absorption Spectroscopy ◽  
Infrared Reflection ◽  
Assembled Monolayers ◽  
Optical Ellipsometry ◽  
Self Assembled

ABSTRACTThe adsorption of a series of 1,2-bis(mercaptomethyl)-4,5-dialkylbenzenes (1), spiroalkanedithiols (2), and aliphatic dithiocarboxylic acids (3) on gold yielded new types of self-assembled monolayers (SAMs). The new SAMs were characterized by optical ellipsometry, contact angle goniometry, and polarization modulation infrared reflection absorption spectroscopy (PM-IRRAS). These results were compared to those obtained from SAMs derived from normal alkanethiols (4) of analogous chain length. Comparisons of ellipsometric thickness and contact angle wettability showed that the new SAMs were well packed and highly oriented. Comparisons of the PM-IRRAS data showed that the SAMs generated from 1 and 2 exhibited slightly less crystallinity than their alkanethiolate-based analogs, while the SAMs generated from 3 exhibited comparable crystallinity to their alkanethiolate-based analogs. Moreover, the SAMs derived from 1 and 2 showed no “odd-even” wettability or PM-IRRAS effects, while those derived from 3 showed remarkably large “odd-even” effects compared to those derived from normal alkanethiols.

The utility of polarization modulation infrared reflection absorption spectroscopy (PM-IRRAS) in surface and in situ studies: new data processing and presentation approach

The Analyst ◽  
2018 ◽  
Vol 143 (11) ◽  
pp. 2563-2573 ◽  
Author(s):  
Evans A. Monyoncho ◽  
Vlad Zamlynny ◽  
Tom K. Woo ◽  
Elena A. Baranova
Keyword(s):  
Infrared Spectroscopy ◽  
Data Processing ◽  
Absorption Spectroscopy ◽  
Organic Molecules ◽  
Polarization Modulation ◽  
In Situ Studies ◽  
Infrared Reflection Absorption Spectroscopy ◽  
Infrared Reflection ◽  
Non Destructive

Infrared spectroscopy is a powerful non-destructive technique for the identification and quantification of organic molecules widely used in scientific studies.

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