Intermolecular coupling enhancement of the molecular hyperpolarizability in multi-chromophoric dipolar dendrons

Shiyoshi Yokoyama, Akira Otomo, Shinro Mashiko

Research output: Contribution to journalConference articlepeer-review


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.

Original languageEnglish
Pages (from-to)BB3.9.1-BB3.9.6
JournalMaterials Research Society Symposium - Proceedings
Publication statusPublished - 2000
Externally publishedYes
EventElectrical, Optical, and Magnetic Properties of Organic Solid-State Materials V - Boston, MA, USA
Duration: Nov 29 2000Dec 3 2000

All Science Journal Classification (ASJC) codes

  • General Materials Science
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering


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