X-ray structure, electrochemical, and nonlinear optical characterization of indolic squaraines as Two-Photon absorbing (TPA) dyes in the visible region was investigated. Squaraines are the condensation product of electron rich molecules, usually activated arenes,π-excessive heterocycles and heteromorphic anhydrobases, with squaric acid. Squaraines were synthesized by refluxing the appropriate indole precursor and squaric acid in a BuOH/toluene mixture under a Dean-Stark trap for a required period of time. Cyclic voltammetry experiments were performed to probe molecular energy levels and the extent of intramolecular donor-acceptor interactions. It was reported that the design and synthesis of π-extended squaraines exhibiting very large TPA cross section efficiencies localized in the NIR region, with the peak performances above 1μm.

Beverina, L., Crippa, M., Salice, P., Ruffo, R., Ferrante, C., Fortunati, I., et al. (2008). Indolic squaraines as two-photon absorbing dyes in the visible region: X-ray structure, electrochemical, and nonlinear optical characterization. CHEMISTRY OF MATERIALS, 20(10), 3242-3244 [10.1021/cm800714k].

Indolic squaraines as two-photon absorbing dyes in the visible region: X-ray structure, electrochemical, and nonlinear optical characterization

BEVERINA, LUCA;RUFFO, RICCARDO;MARI, CLAUDIO MARIA;PAGANI, GIORGIO ALBERTO
2008

Abstract

X-ray structure, electrochemical, and nonlinear optical characterization of indolic squaraines as Two-Photon absorbing (TPA) dyes in the visible region was investigated. Squaraines are the condensation product of electron rich molecules, usually activated arenes,π-excessive heterocycles and heteromorphic anhydrobases, with squaric acid. Squaraines were synthesized by refluxing the appropriate indole precursor and squaric acid in a BuOH/toluene mixture under a Dean-Stark trap for a required period of time. Cyclic voltammetry experiments were performed to probe molecular energy levels and the extent of intramolecular donor-acceptor interactions. It was reported that the design and synthesis of π-extended squaraines exhibiting very large TPA cross section efficiencies localized in the NIR region, with the peak performances above 1μm.
Articolo in rivista - Articolo scientifico
optical limiting, squaraines, two-photon absorption
English
2008
20
10
3242
3244
none
Beverina, L., Crippa, M., Salice, P., Ruffo, R., Ferrante, C., Fortunati, I., et al. (2008). Indolic squaraines as two-photon absorbing dyes in the visible region: X-ray structure, electrochemical, and nonlinear optical characterization. CHEMISTRY OF MATERIALS, 20(10), 3242-3244 [10.1021/cm800714k].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/1163
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