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Phenylene vinylene platinum(II) acetylides with prodigious two-photon absorption
Galyna G Dubinina1, Randi S Price, Khalil A Abboud
1Department of Chemistry, University of Florida, P.O. Box 117200, Gainesville, Florida 32611-7200, USA. dubinina@chem.ufl.edu
Platinum(II) acetylide complexes show high two-photon absorption (2PA) for efficient optical power limiting. These materials offer dual-mode OPL by combining 2PA and triplet absorption across a wide wavelength range.
Area of Science:
- Materials Science
- Optics and Photonics
- Inorganic Chemistry
Background:
- Linear and cross-conjugated platinum(II) acetylide complexes are investigated for their optical properties.
- Extended pi-(phenylene vinylene) chromophores are incorporated to tune these properties.
Purpose of the Study:
- To report the linear and nonlinear optical properties of novel platinum(II) acetylide complexes.
- To evaluate their potential for optical power limiting applications.
Main Methods:
- Femtosecond two-photon absorption (2PA) cross section measurements using nonlinear transmission (NLT) and two-photon excited fluorescence (2PEF).
- Characterization of spectral overlap between 2PA and triplet excited state absorption.
Main Results:
- Complexes exhibit very high 2PA cross section values (sigma(2) up to 10,000 GM).
- High 2PA cross sections are observed across a broad wavelength range (570-810 nm).
- Spectral coincidence between high cross-section 2PA and triplet absorption was identified.
Conclusions:
- The investigated platinum(II) complexes demonstrate significant potential for optical power limiting.
- Dual-mode optical power limiting is achieved through the spectral overlap of 2PA and triplet absorption.
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