Langmuir–Blodgett films of indandione-1,3 pyridinium betaine. III: Linear dichroism and non-linear optical properties
✍ Scribed by M. A. Rutkis; E. Wistus; S. E. Lindquist; E. Mukhtar; G. Liberts; V. A. Zauls; A. B. Klimkans; E. A. Silinsh
- Publisher
- John Wiley and Sons
- Year
- 1996
- Tongue
- English
- Weight
- 958 KB
- Volume
- 6
- Category
- Article
- ISSN
- 1616-301X
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✦ Synopsis
Linear dichroism and second-harmonic generation (SHG) have been measured in Langmuir-Blodgett (LB) multilayers of 2-type structure of amphiphilic indandione-l,3 pyridinium betaine (IPB) with an aliphatic tail containing 17 carbon atoms (Cl71PB). The dichroic ratio ASIA, of electronic absorption of sand p-polarised light and the SHG intensity show that the 'heads' of C171PB molecules are predominantly oriented along the deposition direction of monolayers on a quartz substrate. Orientation parameters and mean statistical azimuthal and tilt angles are evaluated as a function of the number of monolayers. The SHG efficiency has been measured In C171PE monolayers on a water surface as a function of surface pressure. The effective hyperpolarisability / 3 of the IPB molecule has been determined experimentally in a chloroform solution by the hyper-Rayleigh-scattering method. The obtained value of p = (138+16) x lo-% esu is in good agreement with theoretical estimates.