Phosphorescent Iridium(III) Complexes with Acyclic Diaminocarbene Ligands as Chemosensors for Mercury

Anzhelika A. Eremina, Mikhail A. Kinzhalov, Evgene A. Katlenok, Andrey S. Smirnov, Elena V. Andrusenko, Evgeny A. Pidko, Vitalii V. Suslonov, Konstantin V. Luzyanin

Результат исследований: Научные публикации в периодических изданияхстатья

1 Цитирования (Scopus)

Аннотация

A new application for bis(cyclometalated) iridium(III) species containing ancillary acyclic diaminocarbene ligands, viz. for sensing of mercury(II) ions, is disclosed. A family of bis(cyclometalated) iridium(III) species supported by both parent isocyanide and acyclic diaminocarbene ligands was prepared, and their electrochemical and photophysical properties were evaluated, revealing efficient blue-green phosphorescence in solution with quantum yields of up to 55%. We uncovered that the photophysical properties of these complexes are dramatically altered by the presence of metal ions and that the complex [Ir(ppy)2(CN){C(NH2)(NHC6H4-4-X)}] with an ADC ligand reacts selectively with Hg2+ ions, enabling its use for sensing of mercury(II) ions in solution. The limit of detection was as low as 2.63 × 10-7 M, and additional mechanistic studies indicated the formation of an unusual dinuclear iridium(III) cyclometalated intermediate, bridged by a mercury dicyano fragment as a driving force of mercury sensing.

Язык оригиналаанглийский
Страницы (с-по)2209-2222
ЖурналInorganic Chemistry
Том59
Номер выпуска4
DOI
СостояниеЭлектронная публикация перед печатью - 3 фев 2020

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Предметные области Scopus

  • Физическая и теоретическая химия
  • Неорганическая химия

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