Properties of singlet- and triplet-excited states of hemicyanine dyes

The fluorescence emission spectra and fluorescence quantum yields of hemicyanine dyes LDS 698, LDS 722, and LDS 730 were measured in different media. No transient species was detected in the laser flash-photolysis experiments performed with Ar-saturated solutions of the dyes in methanol. However, in the presence of 0.08 M potassium iodide, the absorption of the triplet states was clearly observed. Oxygen consumption measurements in the absence and presence of a chemical trap (furfuryl alcohol) in MeOH: H2O (φ r = 1: 1) solutions of the dyes containing KI confirmed the generation of singlet molecular oxygen.

Palabras clave: Triplet States , Singlet Oxygen , Hemicyanine Dyes , Flash-Photolysis

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Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Creative Commons Attribution-NonCommercial-ShareAlike 2.5 Unported (CC BY-NC-SA 2.5)

Identificadores

URI: http://hdl.handle.net/11336/33522

DOI: http://dx.doi.org/10.2478/s11696-014-0547-5

URL: https://www.degruyter.com/view/j/chempap.2014.68.issue-8/s11696-014-0547-5/s1169

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Articulos(CCT - CORDOBA)
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - CORDOBA

Articulos(INIFTA)
Articulos de INST.DE INV.FISICOQUIMICAS TEORICAS Y APLIC.

Citación

Villata, Laura; Montejano, Hernan Alfredo; Gonzalez, Monica Cristina; Caregnato, Paula; Garcia, Norman Andino; Massad, Walter Alfredo; et al.; Properties of singlet- and triplet-excited states of hemicyanine dyes; Versita; Chemical Papers; 68; 8; 6-2014; 1137-1140

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