Eremina, Anzhelika A, Kinzhalov, Mikhail A, Katlenok, Evgene A, Smirnov, Andrey S, Andrusenko, Elena V, Pidko, Evgeny A, Suslonov, Vitalii V and Luzyanin, Konstantin V ORCID: 0000-0001-9312-7139
(2020)
Phosphorescent Iridium(III) Complexes with Acyclic Diaminocarbene Ligands as Chemosensors for Mercury.
INORGANIC CHEMISTRY, 59 (4).
pp. 2209-2222.
Text
02. Ir-Hg_InorgChem_12.docx - Author Accepted Manuscript Download (2MB) |
|
Text
03. Ir-Hg_InorgChem_SI-52.docx - Author Accepted Manuscript Download (11MB) |
Abstract
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)<sub>2</sub>(CN){C(NH<sub>2</sub>)(NHC<sub>6</sub>H<sub>4</sub>-4-X)}] with an ADC ligand reacts selectively with Hg<sup>2+</sup> ions, enabling its use for sensing of mercury(II) ions in solution. The limit of detection was as low as 2.63 × 10<sup>-7</sup> 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.
Item Type: | Article |
---|---|
Depositing User: | Symplectic Admin |
Date Deposited: | 12 Feb 2020 08:57 |
Last Modified: | 25 Jan 2024 10:15 |
DOI: | 10.1021/acs.inorgchem.9b02833 |
Related URLs: | |
URI: | https://livrepository.liverpool.ac.uk/id/eprint/3074556 |