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Article Dans Une Revue Chemistry - A European Journal Année : 2022

Femtosecond Spectroscopy and Nonlinear Optical Properties of aza-BODIPY Derivatives in Solution

Résumé

The fast relaxation processes in the excited electronic states of functionalized aza-boron-dipyrromethene (aza-BODIPY) derivatives (1-4) were investigated in liquid media at room temperature, including the linear photophysical, photochemical, and nonlinear optical (NLO) properties. Optical gain was revealed for nonfluorescent derivatives 3 and 4 in the near infrared (NIR) spectral range under femtosecond excitation. The values of two-photon absorption (2PA) and excited-state absorption (ESA) cross-sections were obtained for 1-4 in dichloromethane using femtosecond Z-scans, and the role of bromine substituents in the molecular structures of 2 and 4 is discussed. The nature of the excited states involved in electronic transitions of these dyes was investigated using quantum-chemical TD-DFT calculations, and the obtained spectral parameters are in reasonable agreement with the experimental data. Significant 2PA (maxima cross-sections ∼2000 GM), and large ESA cross-sections ∼10(-20)  m(2) of these new aza-BODIPY derivatives 1-4 along with their measured high photostability reveal their potential for photonic applications in general and optical limiting in particular.
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Dates et versions

hal-03632017 , version 1 (15-02-2023)

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Paternité - Pas d'utilisation commerciale

Identifiants

Citer

Hao-Jung Chang, Mykhailo V Bondar, Natalia Munera, Sylvain David, Olivier Maury, et al.. Femtosecond Spectroscopy and Nonlinear Optical Properties of aza-BODIPY Derivatives in Solution. Chemistry - A European Journal, 2022, 28 (17), pp.e202104072. ⟨10.1002/chem.202104072⟩. ⟨hal-03632017⟩
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