Abstract
The second harmonic signal from monolayers of retinal and retinal Schiff bases is reported. The results have yielded information on the monolayer structure and demonstrate that retinal and retinal Schiff bases have large second-order molecular hyperpolarizabilities with values of 1.4 × 10-28, 1.2 × 10-28, and 2.3 × 10-28 esu for retinal, the unprotonated Schiff base, and the protonated Schiff base, respectively. These values compare well with the known variation in the alteration in the dipole moment of such chromophores upon excitation.
| Original language | English |
|---|---|
| Pages (from-to) | 1756-1759 |
| Number of pages | 4 |
| Journal | Journal of Physical Chemistry |
| Volume | 92 |
| Issue number | 7 |
| DOIs | |
| State | Published - 1988 |