Abstract
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 language | English (US) |
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Article number | FF4.5/V4.5 |
Pages (from-to) | 151-156 |
Number of pages | 6 |
Journal | Materials Research Society Symposium Proceedings |
Volume | 883 |
State | Published - Dec 1 2005 |
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials