Spectral Properties of Highly Emissive Derivative of Coumarin with N,N-Diethylamino, Nitrile and Tiophenecarbonyl Moieties in Water-Methanol Mixture
Anna Kolbus , Andrzej Danel , Danuta Grabka , Mateusz Kucharek , Karol Szary
AbstractThe new derivative of coumarin (E)-3-[7-(diethyloamino)-2-oxo-chromen-3yl]-2-(tiophene-2-carbonyl)prop-2-enenitrile (NOSQ) was easy synthesized with commercial substrates as a result of the search of new Michael type addition sensors based on coumarins. Spectral properties of highly emissive NOSQ were investigated by steady state analysis (absorption and fluorescence measurements) and time-resolved analysis (fluorescence lifetime measurements). The effect of water-methanol mixture on the photophysical properties of the NOSQ molecule was analyzed. With increasing of volumetric fraction of water the intensity of absorbance and fluorescence was strongly reduced. The NOSQ quantum yield in methanol was quite high and the first portions of water caused a significant increase in this value. Water, which is usually a quencher, in this case caused the increase in the quantum yield. The fluorescence lifetimes had second-order decay and the values of fluorescence lifetime increased with increasing alcohol content. Density functional theory (DFT) calculations and experimental data remained in agreement and showed that the interaction between the NOSQ molecule and the solvent affects the appearance of the new conformer.
|Journal series||Journal of Fluorescence, ISSN 1053-0509, e-ISSN 1573-4994, (N/A 40 pkt)|
|Publication size in sheets||0.5|
|Keywords in English||Derivative of coumarin, Binary solvent mixture, Quantum yield, Fluorescence study|
|ASJC Classification||; ; ; ; ; ;|
|License||Journal (articles only); author's original; ; after publication|
|Publication indicators||= 0; : 2018 = 0.551; : 2018 = 1.913 (2) - 2018=1.717 (5)|
|Finansowanie||The synthetic part of this work was financed by the basic funding of the Agricultural University (DS 3711/ICh/2018).|
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