Luminescent amine sensor based on europium(III) chelate

Nataliya V Petrochenkova; Anatolii G Mirochnik; Tatyana B Emelina; Alexander A Sergeev; Andrei A Leonov; Sergey S Voznesenskii

doi:10.1016/j.saa.2018.03.084

Luminescent amine sensor based on europium(III) chelate

Spectrochim Acta A Mol Biomol Spectrosc. 2018 Jul 5:200:70-75. doi: 10.1016/j.saa.2018.03.084. Epub 2018 Apr 3.

Authors

Nataliya V Petrochenkova¹, Anatolii G Mirochnik², Tatyana B Emelina³, Alexander A Sergeev⁴, Andrei A Leonov⁴, Sergey S Voznesenskii⁴

Affiliations

¹ Institute of Chemistry, Far East Branch of Russian Academy of Sciences, Vladivostok 690022, Russia; Nevelskoy Maritime State University, Vladivostok 690059, Russia.
² Institute of Chemistry, Far East Branch of Russian Academy of Sciences, Vladivostok 690022, Russia. Electronic address: mirochnik@ich.dvo.ru.
³ Institute of Chemistry, Far East Branch of Russian Academy of Sciences, Vladivostok 690022, Russia. Electronic address: maks-im2@mail.ru.
⁴ Institute of Automatics and Control Processes, Far East Branch of Russian Academy of Sciences, Vladivostok 690041, Russia.

PMID: 29665459
DOI: 10.1016/j.saa.2018.03.084

Abstract

The effect of methylamine vapor on luminescence of Eu(III) tris-benzoylacetonate (I) immobilized in thin-layer chromatography plates has been investigated. It has been revealed that interaction of I with analyte vapor results in increase of the intensity of Eu(III) luminescence. The mechanism of the effect of methylamine vapors on intensification of the Eu(III) luminescence has been suggested using the data of IR spectroscopy and quantum chemistry calculations. The mechanism of luminescence sensitization consists in bonding of an analyte molecule with a water molecule into the coordination sphere of Eu(III). As a result, the bond of a water molecule with the luminescence centre weakens, rigid structural fragment including europium ion, water and methylamine molecules forms. The presence of such fragment must naturally promote decrease of influence of OH-vibrations on luminescence of the complex I.

Keywords: Benzoylacetonate; Chemosensors; Europium(III); Luminescence; Methylamine.