Photoluminescence and electrochemiluminescence studies of chosen rare earths systems
来源期刊：JOURNAL OF RARE EARTHS2008年第2期
论文作者：Krzysztof Staninski Stefan Lis Monika Jesiolowska Slawomir But
Key words：Ln(III); luminescence; electrochemiluminescence; polyoxometalates; complexes; rare earths;
Abstract: Eu(III) complexes with chosen Keggin polyoxomatalates, POM, containing organic counter cations (tetrabutylammonium, tetrabutylphosphonium, triphenylethylphosphonium), were synthesized, and their photophysical properties were studied. The synthesized complexes had the general formula of XnH5-n[EuSiW11O39], formulated based on the results of elemental and thermogravimetric analysis and FTIR spectroscopy. The photophysical properties of the obtained compounds were investigated using photoluminescence and electrochemiluminescence, ECL, methods in solutions and solids. The most intense luminescence of Eu(III) was observed for the complexes with tetrabutylammonium cations. After the addition of phenanthroline to the XnH5-n[EuSiW11O39] solutions, a large increase in the Eu(III) luminescence intensity and a lengthening of its luminescence lifetime were observed as a result of the formation of ternary complexes. Attempts to apply ECL as a method of light emission by generating species capable of forming excited states in Ln/POMs, i.e., Tb(III) and Eu(III) in the Na9EuW10O36 and Na9TbW10O36 complexes, were made. The influence of the POM complexes on the ECL was also tested using the Tb/EDDHA (EDDA=ethylenediamine di(o-hydroxyphenylacetic acid)) complex, which is effective in generating ECL.
Krzysztof Staninski1，Stefan Lis1，Monika Jesiolowska1，Slawomir But1
(1.Department of Rare Earths, Faculty of Chemistry, Adam Mickiewicz University, Grunwaldzka 6, Poznań, 60-780, Poland)
Abstract:Eu(III) complexes with chosen Keggin polyoxomatalates, POM, containing organic counter cations (tetrabutylammonium, tetrabutylphosphonium, triphenylethylphosphonium), were synthesized, and their photophysical properties were studied. The synthesized complexes had the general formula of XnH5-n[EuSiW11O39], formulated based on the results of elemental and thermogravimetric analysis and FTIR spectroscopy. The photophysical properties of the obtained compounds were investigated using photoluminescence and electrochemiluminescence, ECL, methods in solutions and solids. The most intense luminescence of Eu(III) was observed for the complexes with tetrabutylammonium cations. After the addition of phenanthroline to the XnH5-n[EuSiW11O39] solutions, a large increase in the Eu(III) luminescence intensity and a lengthening of its luminescence lifetime were observed as a result of the formation of ternary complexes. Attempts to apply ECL as a method of light emission by generating species capable of forming excited states in Ln/POMs, i.e., Tb(III) and Eu(III) in the Na9EuW10O36 and Na9TbW10O36 complexes, were made. The influence of the POM complexes on the ECL was also tested using the Tb/EDDHA (EDDA=ethylenediamine di(o-hydroxyphenylacetic acid)) complex, which is effective in generating ECL.
Key words:Ln(III); luminescence; electrochemiluminescence; polyoxometalates; complexes; rare earths;
【全文内容正在添加中】
