Synthesis and unprecedented electro-optic response properties of twisted π-system chromophores

Hu Kang*, Antonio Facchetti, Hua Jiang, Peiwang Zhu, Tobin J. Marks

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

2 Scopus citations


A series of unconventional twisted intramolecular charge-transfer (TICT) chromophores was designed and synthesized. These chromophores exhibit ultra-large first hyperpolarizabilities. The structural characteristic that promotes this unusual nonlinear optical response is a sterochemically enforced reduction of the D-π-A conjugation that enforces zwitterionic behavior in the ground state and provides a low-energy, large-oscillator strength intramolecular excitation feature. The consequence is that molecules with relatively small numbers of π-electrons exhibit responses far larger than those of traditional planar π-conjugated chromophores. At 1907 nm, non-resonant μß values as high as -466,000 × 10-48 esu are observed.

Original languageEnglish (US)
Article numberFF4.5/V4.5
Pages (from-to)151-156
Number of pages6
JournalMaterials Research Society Symposium Proceedings
StatePublished - Dec 1 2005

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials


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