Second Harmonic Generation (SHG) was used to investigate the two enantiomers of a chiral bridged binaphthol derivative 1(+) and 1(-) at the air-water interface under lateral compression in a Langmuir trough. For each enantiomer, surface pressure and SH intensity were measured simultaneously during compression and decompression cycle of the molecular film. S polarized output SHG intensity as a function of the input polarization angle of the fundamental beam demonstrated the supramolecular origin for the chirality. The formation of 1(+) and 1(-) aggregates in the film was deduced from the non-vanishing SHG intensities collected for the 90° input and S output polarization angles.

Date Published: 16 March 2015
PDF: 6 pages
Proc. SPIE 9360, Organic Photonic Materials and Devices XVII, 936014 (16 March 2015); doi: 10.1117/12.2079084

Published in SPIE Proceedings Vol. 9360:
Organic Photonic Materials and Devices XVII
Christopher E. Tabor; François Kajzar; Toshikuni Kaino; Yasuhiro Koike, Editor(s)