Photophysical Properties of some 1,3,4-Oxadiazole Derivatives Containing Phenolphtalein, Fluorene and Bisphenol A Units

Journal of Fluorescence
M HomocianuA Airinei

Abstract

The photophysical properties of the three 1,3,4-oxadiazole derivatives containing fluorene (Ox-FL); fluorene and phenolphtaleine (Ox-FL-FF); or fluorene and bisphenol A (Ox-FL-BPA) moieties in the main chain were investigated by the fluorescence and absorption spectroscopy in different solvents and in the solid state. The electronic absorption spectra included a strong absorption band located in the 270-395 nm region, with a maxima around at 302 nm. The fluorescence excitation spectra were also characterized by one broad band, appearing in the wavelength range of 220-340 nm. All samples displayed the emission bands around 356-373 nm and exhibit high quantum yields ranged from 31.61 to 90.77%, in chloroform solution. The sensitivity of the emission spectra on medium characteristics (polarity, acidity and basicity) were evaluated by using the Catalan solvent scale and the fluorescence titration with a dilute acid solution.

References

Sep 8, 2009·Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy·Gönül Yenilmez CiftçiAdem Kiliç
Jul 19, 2012·Journal of Exposure Science & Environmental Epidemiology·Scott M ArnoldSteven G Hentges
Aug 29, 2012·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Cledualdo Soares de OliveiraPetrônio Filgueiras de Athayde-Filho
Jan 9, 2014·Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy·A M IpateM Bruma

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Methods Mentioned

BETA
NMR
fluorescence spectroscopy
Fluorescence
fluorimetric titration

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