Nonlinear optical dendritic macromolecules, called `azobenzene dendrons', having a branching structure modified with a second-order nonlinear optical chromophore has been synthesized. An electron donor and acceptor azobenzene chromophore having a large molecular hyperpolarizability of β0 = 150E-30 esu, was chosen. The electronic structure of synthesized dendrons, which were expected to become dipolar due to their intermolecular attractive interaction, was proven by second-order nonlinear optical properties. The molecular hyperpolarizabilities of azobenzene dendrons were measured by the hypr-Rayleigh scattering technique. The highest molecular hyperpolarizability was found to be 3,010E-30 esu for an azobenzene dendron having 15 chromophoric unit, where each chromophore coherently contribute to the second harmonic generation. This level of the molecular hyperpolarizability was much larger than that for a monomeric azobenzene chromophore.
|ジャーナル||Materials Research Society Symposium - Proceedings|
|出版ステータス||出版済み - 2000|
|イベント||Electrical, Optical, and Magnetic Properties of Organic Solid-State Materials V - Boston, MA, USA|
継続期間: 11 29 2000 → 12 3 2000
All Science Journal Classification (ASJC) codes