Monolayer formation characteristics of novel organic molecules with nonlinear optically active moieties
Abstract
Organic materials were recently recognized as promising candidates for nonlinear optics (NLO) applications in view of their fast response time and large non-resonant nonlinear effects in comparison with their inorganic counterparts. Organic materials that form molecular crystals and polymers with optimized molecular structure are therefore being synthesized and their NLO response assessed in attempts to obtain superior material performance. Another advantage of organic and polymeric materials is their relative ease of processing. It is possible to fabricate ultra thin films of organic NLO material that are suitably designed using the Langmuir-Blodgett (L-B) technique. A number of novel electroactive materials with amphibolic molecular structure containing COOH, OH, NMe2, OMe, NO2, and CN were synthesized. The monolayer forming ability of these compounds is discussed. The stability of the monolayer as a function of pH, temperature, composition of the material in mixed monolayers and the nature of the subphase are investigated. Appropriate choice of experimental conditions under which a stable monolayer is obtained for each material is indicated.
- Publication:
-
Presented at the 4th International Conference on Langmuir-Blodgett Films
- Pub Date:
- May 1989
- Bibcode:
- 1989lbf..conf...24K
- Keywords:
-
- Mixed Crystals;
- Molecular Structure;
- Molecules;
- Nonlinear Optics;
- Optimization;
- Reaction Time;
- Synthesis (Chemistry);
- Carboxyl Group;
- Cyanides;
- Hydroxyl Radicals;
- Methyl Compounds;
- Nitrogen Oxides;
- Nonlinearity;
- Organic Compounds;
- Polymeric Films;
- Thin Films;
- Atomic and Molecular Physics