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Triphenylamine derivatives with large two-photon cross-sections.
Wen Jun Yang1, Dae Young Kim, Chang Ho Kim
1Molecular Opto-Electronics Laboratory, Department of Chemistry and Center for Electro- and Photo-Responsive Molecules, Korea University, 1-Anamdong, Seoul 136-701, Korea.
Organic Letters
|April 23, 2004
Summary
New triphenylamine derivatives show large two-photon cross-sections across many wavelengths. A consistent linear relationship was found between two-photon cross-section measurements using different experimental methods.
Area of Science:
- Organic Chemistry
- Materials Science
- Photophysics
Background:
- Triphenylamine derivatives are known for their interesting photophysical properties.
- Two-photon absorption (TPA) is crucial for applications like 3D microfabrication and optical data storage.
- Developing novel materials with large TPA cross-sections is an active area of research.
Purpose of the Study:
- To synthesize novel triphenylamine derivatives.
- To investigate their two-photon absorption properties.
- To establish structure-property relationships for TPA.
Main Methods:
- Synthesis of triphenylamine derivatives.
- Femtosecond (fs) Z-scan measurements to determine TPA cross-sections.
- Nanosecond (ns) fluorescence spectroscopy for complementary measurements.
Main Results:
- Synthesized derivatives exhibit large two-photon cross-sections over a broad wavelength range.
- The largest two-photon cross-section value was measured using the fs Z-scan technique.
- A linear correlation was observed between TPA cross-sections measured by ns fluorescence and fs Z-scan methods.
Conclusions:
- The synthesized triphenylamine derivatives are promising candidates for TPA applications.
- The fs Z-scan method provides reliable and high-magnitude TPA cross-section data.
- The linear relationship simplifies the characterization of TPA materials.