Triboluminescence of Inorganic Lanthanide Salts

Шарипов, Г. Л.; Tukhbatullin, A. A.

doi:10.1007/978-3-319-38842-7_9

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“…During ultrasonic exposure of suspensions of terbium and europium sulfate crystals in higher n-alkanes (from decane to hexadecane [8,[14][15][16]), in addition to the emission of the Eu 3+ and Tb 3+ ions, N 2 lines are also recorded in the STL spectra (Figure 1). The molecular nitrogen lines are observed mainly in the UV region [17,18].…”

Section: Resultsmentioning

confidence: 99%

Application of Sonotriboluminescence to Determine Arene Molecules in Hydrocarbons

Tukhbatullin,

Panova,

Galimov

et al. 2023

Molecules

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The sonotriboluminescence of suspensions of terbium(III) and europium(III) sulfates in decane without and in the presence of benzene, toluene and p-xylene was studied. The choice of crystals of these lanthanides is due to the fact that they have intense luminescence during mechanical action, and also do not dissolve in hydrocarbon solvents. During ultrasonic exposure to suspensions in pure alkanes, bands of Ln3+ ions and N2 in the UV region are recorded in the luminescence spectrum. When aromatic hydrocarbon molecules are added, bands of benzene, toluene and p-xylene molecules, coinciding with their photoluminescence spectra, are recorded in the sonotriboluminescence spectra in the UV region. The high sensitivity of the luminescence of suspensions to arene additives made it possible to obtain the dependence of the characteristic fluorescence of arene molecules in the sonotriboluminescence spectra on their concentration in suspensions. The limits of detection of benzene, toluene and p-xylene in the composition of this suspension were established. The lower limits of detection from the sonotriboluminescence spectra for xylene, toluene and benzene are 0.1, 3 and 50 ppmv, respectively. Fluorescence bands of these molecules were also recorded in the sonotriboluminescence spectra of suspensions in commercial dodecane and heptane with additives of commercial gasoline (up to 1%). The results obtained can be used for luminescent detection of aromatic compounds in saturated hydrocarbons.

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