Formation of Chiral Interdigitated Multilayers at the Air-Liquid Interface Through Acid-Base Interactions
Thin interdigitated films composed of a long-chain, water-insoluble chiral acid (p-pentadecylmandelic acid of absolute configuration R) and a water-soluble chiral base (phenylethylamine, R') were constructed at the air-solution interface. The (R, R') structure was characterized to near-atomic resolution by grazing-incidence x-ray diffraction (GIXD). The two diastereomeric systems, (R, R') and (R, S'), demonstrate similar surface pressure-molecular area isotherms, but their structures are completely different on the molecular level, as monitored by GIXD. Complementary data on these two architectures were provided by atomic force microscopy.
Kuzmenko
I
I. Kuzmenko, R. Buller, M. Lahav, L. Leiserowitz, Department of Materials and Interfaces, Weizmann Institute of Science, Rehovot 76100, Israel. W. G. Bouwman and K. Kjaer, Department of Solid State Physics, Riso National Laboratory, DK-4000 Roskilde, Denmark. J. Als-Nielsen, Niels Bohr Institute, H. C. Orsted Laboratory, DK-2100 Copenhagen, Denmark.
Buller
R
Bouwman
WG
Kjaer
K
Als-Nielsen
J
Lahav
M
Leiserowitz
L