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Published on: August 19, 2021
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Two-photon absorption properties of simple neutral Ir(III) complexes.
Eleonora Garoni1, Alessia Colombo1, Dominique Roberto1
1Department of Chemistry, Università degli Studi di Milano, UdR dell'INSTM, Via Golgi 19, 20133 Milano, Italy. claudia.dragonetti@unimi.it.
Physical Chemistry Chemical Physics : PCCP
|February 20, 2024
Summary
Researchers synthesized novel iridium(III) complexes with tunable electronic properties. These compounds exhibit significant two-photon absorption (TPA) and nonlinear optical (NLO) activity, making them promising multifunctional chromophores.
Area of Science:
- Organometallic Chemistry
- Materials Science
- Nonlinear Optics
Background:
- Iridium(III) complexes are known for their photophysical properties.
- π-conjugated systems are crucial for enhancing optical responses.
- Developing materials with both two-photon absorption (TPA) and second-order nonlinear optical (NLO) properties is of great interest.
Purpose of the Study:
- To synthesize and characterize novel neutral iridium(III) complexes.
- To investigate the influence of π-conjugated substituents with varying donor abilities on TPA properties.
- To evaluate the potential of these complexes as multifunctional chromophores.
Main Methods:
- Synthesis of iridium(III) complexes with substituted 2-phenylpyridine ligands.
- Z-scan technique for determining two-photon absorption properties.
- Measurement of nonlinear optical (NLO) properties.
Main Results:
- A series of neutral Ir(2-phenylpyridine)3 derivatives were successfully prepared.
- The complexes displayed significant two-photon absorption activity.
- The best TPA cross section achieved was 750 GM.
- The compounds also exhibited high second-order NLO properties.
Conclusions:
- Simple, easily synthesized iridium(III) complexes can possess excellent TPA activity.
- These complexes function as multifunctional chromophores due to combined TPA and NLO properties.
- The study highlights the potential of these materials in optical applications.
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