title: Europium(III) tris-dibenzoylmethanate as an efficient chemosensor for detection of ammonia.
abstract: The effect of ammonia vapor on luminescence of Eu(III) tris-dibenzoylmethanate immobilized in various matrices has been investigated. It has been revealed that interaction of Eu(III) tris-dibenzoylmethanate with analyte vapor results in increase of the intensity of Eu(III) luminescence. The mechanism of the effect of ammonia vapors on intensification of the Eu(III) luminescence has been suggested using the data of IR spectroscopy, X-ray diffraction analysis 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 and the blockage of the quenching of luminescence on OH-vibrations takes place.
authors.affiliation: Institute of Chemistry, Far East Branch, Russian Academy of Sciences, Vladivostok, 690022, Russia. Electronic address: mirochnik@ich.dvo.ru.
authors.forename: Anatolii G
authors.initials: AG
authors.lastname: Mirochnik
authors.affiliation: Institute of Chemistry, Far East Branch, Russian Academy of Sciences, Vladivostok, 690022, Russia; Nevelskoy Maritime State University, Vladivostok, 690059, Russia.
authors.forename: Nataliya V
authors.initials: NV
authors.lastname: Petrochenkova
authors.affiliation: Institute of Chemistry, Far East Branch, Russian Academy of Sciences, Vladivostok, 690022, Russia.
authors.forename: Alexander S
authors.initials: AS
authors.lastname: Shishov
authors.affiliation: Institute of Chemistry, Far East Branch, Russian Academy of Sciences, Vladivostok, 690022, Russia.
authors.forename: Boris V
authors.initials: BV
authors.lastname: Bukvetskii
authors.affiliation: Institute of Chemistry, Far East Branch, Russian Academy of Sciences, Vladivostok, 690022, Russia.
authors.forename: Tatyana B
authors.initials: TB
authors.lastname: Emelina
authors.affiliation: Institute of Automatics and Control Processes, Far East Branch, Russian Academy of Sciences, Vladivostok, 690041, Russia.
authors.forename: Alexander A
authors.initials: AA
authors.lastname: Sergeev
authors.affiliation: Institute of Automatics and Control Processes, Far East Branch, Russian Academy of Sciences, Vladivostok, 690041, Russia.
authors.forename: Sergey S
authors.initials: SS
authors.lastname: Voznesenskii
keywords: Ammonia; Chemosensors; Dibenzoylmethanate; Europium(III); Luminescence