scholarly journals Mechanistic Insights on the Photosensitized Chemistry of a Fatty Acid at the Air/Water Interface

2016 ◽  
Vol 50 (20) ◽  
pp. 11041-11048 ◽  
Author(s):  
Liselotte Tinel ◽  
Stéphanie Rossignol ◽  
Angelica Bianco ◽  
Monica Passananti ◽  
Sébastien Perrier ◽  
...  
Keyword(s):  
Fatty Acid ◽  
Water Interface ◽  
Air Water Interface

Metastability in Monolayer Films Transferred onto Solid Substrates by the Langmuir-Blodgett Method: IR Evidence for Transfer-Induced Phase Transitions

1994 ◽  
Vol 48 (10) ◽  
pp. 1196-1203 ◽  
Author(s):  
Fazale R. Rana ◽  
Suci Widayati ◽  
Brian W. Gregory ◽  
Richard A. Dluhy
Keyword(s):  
Fatty Acid ◽  
Conformational Changes ◽  
Structural Changes ◽  
High Surface ◽  
Solid Substrate ◽  
Water Interface ◽  
Monolayer Films ◽  
Langmuir Blodgett ◽  
Monomolecular Film ◽  
Air Water Interface

The rate at which a monomolecular film is deposited onto a solid substrate in the Langmuir-Blodgett process of preparing supported monolayer films influences the final structure of the transferred film. Attenuated total reflectance infrared spectroscopic studies of monolayers transferred to germanium substrates show that the speed at which the substrate is drawn through the air/water interface influences the final conformation in the hydrocarbon chains of amphiphilic film molecules. This transfer-induced effect is especially evident when the monolayer is transferred from the expanded region of surface-pressure-molecular-area isotherms at low surface pressures; the effect is minimized when the film molecules are transferred from condensed phases at high surface pressures. This phenomenon has been observed for both a fatty acid and a phospholipid, which suggests that these conformational changes may occur in a variety of hydrocarbon amphiphiles transferred from the air/water interface. This conformational ordering may be due to a kinetically limited phase transition taking place in the meniscus formed between the solid substrate and aqueous subphase. In addition, the results obtained for both the phospholipid and fatty acid suggest that the structure of the amphiphile may help determine the extent and nature of the transfer-speed-induced structural changes taking place in the monomolecular film.

Molecular Orientation in Mixed Monolayers of Hemicyanine and Fatty Acid at an Air/Water Interface Studied by Second Harmonic Generation

1990 ◽  
Vol 29 (Part 1, No. 4) ◽  
pp. 750-755 ◽  
Author(s):  
Koichiro Shirota ◽  
Koutaro Kajikawa ◽  
Hideo Takezoe ◽  
Atsuo Fukuda
Keyword(s):  
Fatty Acid ◽  
Second Harmonic Generation ◽  
Harmonic Generation ◽  
Molecular Orientation ◽  
Second Harmonic ◽  
Water Interface ◽  
Mixed Monolayers ◽  
Air Water Interface

Atmospheric photochemistry at a fatty acid-coated air-water interface

Science ◽  
2016 ◽  
Vol 353 (6300) ◽  
pp. 699-702 ◽  
Author(s):  
S. Rossignol ◽  
L. Tinel ◽  
A. Bianco ◽  
M. Passananti ◽  
M. Brigante ◽  
...  
Keyword(s):  
Fatty Acid ◽  
Water Interface ◽  
Atmospheric Photochemistry ◽  
Air Water Interface

Study of an Imidazole Derivative Mixed with Fatty Acid at Air-Water Interface and in Ultrathin Films

2018 ◽  
Vol 5 (1) ◽  
pp. 2287-2294
Author(s):  
Bapi Dey ◽  
P. Debnath ◽  
D. Bhattacharjee ◽  
S. Majumdar ◽  
Syed Arshad Hussain
Keyword(s):  
Fatty Acid ◽  
Ultrathin Films ◽  
Imidazole Derivative ◽  
Water Interface ◽  
Air Water Interface

Fiber Optic Sensing of Fluorescent Emission from Compressed Cyanine-Dye-Impregnated Fatty Acid Monolayers at the Air/Water Interface

1988 ◽  
Vol 42 (4) ◽  
pp. 605-608 ◽  
Author(s):  
W. M. Reichert ◽  
C. J. Bruckner ◽  
Sui-Ren Wan
Keyword(s):  
Fatty Acid ◽  
Fiber Optics ◽  
Fiber Optic ◽  
Arachidic Acid ◽  
Cyanine Dye ◽  
Water Interface ◽  
Molecular Area ◽  
Molar Ratios ◽  
Langmuir Film Balance ◽  
Air Water Interface

Fluorescence was collected from cyanine-dye-impregnated arachidic acid monolayers at the air/water interface with the use of a fiber optics configuration and a Langmuir film balance. Fatty-acid-to-dye molar ratios in the monolayers ranged from 99:1 to 1:1. The monolayers were compressed in a step-wise manner, with sampling of cyanine fluorescence after each compression step. A drop in fluorescence intensity ranging from 20 to 80% was observed between the uncompressed and compressed monolayers. The observed fluorescence decrease appeared to be a function of barrier pressure rather than molecular area and dye concentration.

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