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Transient Second Harmonic Generation from Oxazine Dyes at the Air/Water Interface

✍ Scribed by Steinhurst, Daniel A.; Baronavski, Andrew P.; Owrutsky, Jeffrey C.

Book ID
127296370
Publisher
American Chemical Society
Year
2002
Tongue
English
Weight
73 KB
Volume
106
Category
Article
ISSN
0022-3654

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We have used second harmonic generation to directly observe chemical changes in a lipid monolayer. We observed that pK, of phexadecyl aniline at the air/water interface is 3.6& 0.2 versus 5.3 fO.l in the bulk. This fiftyfold increase in acidity is due to the higher free energy of a charged species a