NDLI: Cationic Iridium(III) Complex Containing both Triarylboron and Carbazole Moieties as a Ratiometric Fluoride Probe That Utilizes a Switchable Triplet–Singlet Emission

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Cationic Iridium(III) Complex Containing both Triarylboron and Carbazole Moieties as a Ratiometric Fluoride Probe That Utilizes a Switchable Triplet–Singlet Emission

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Liu, Shu-juan Zhao, Qiang Xu, Wen-juan Huang, Wei Ma, Ting-chun Cheng, Shan Sun, Hui-bin Zhao, Xin-yan Sun, Shi
Description	Author Affiliation: Xu WJ ( Jiangsu Key Laboratory for Organic Electronics & Information Displays and Institute of Advanced Materials (IAM), Nanjing University of Posts & Telecommunications (NUPT), 9 Wenyuan Road, Nanjing 210046, China.)
Abstract	A novel cationic $Ir^{III}$ complex $[Ir(Bpq)_{2}(CzbpyCz)]PF_{6}$ (Bpq=2-[4-(dimesitylboryl)phenyl]quinoline, CzbpyCz = 5,5′-bis(9-hexyl-9H-carbazol-3-yl)-2,2′-bipyridine) containing both triarylboron and carbazole moieties was synthesized. The excited-state properties of $[Ir(Bpq)_{2}(CzbpyCz)]PF_{6}$ were investigated through UV/Vis absorption and photoluminescence spectroscopy and molecular-orbital calculations. This complex displayed highly efficient orange-red phosphorescent emission with an emission peak of 583 nm and quantum efficiency of Φ=0.30 in dichloromethane at room temperature. The binding of fluoride ions to $[Ir(Bpq)_{2}(CzbpyCz)]PF_{6}$ can quench the phosphorescent emission from the $Ir^{III}$ complex and enhance the fluorescent emission from the N^N ligand, which corresponds to a visual change in the emission from orange-red to blue. Thus, both colorimetric and ratiometric fluoride sensing can be realized. Interestingly, an unusual intense absorption band in the visible region was observed. And the detection of $F^{−}$ ions can also be carried out with visible light as the excitation wavelength. More importantly, the linear response of the probe absorbance change at λ=351 nm versus the concentration of $F^{−}$ ions allows efficient and accurate quantification of $F^{−}$ ions in the range 0–50 μM.
ISSN	09476539
e-ISSN	15213765
Journal	Chemistry - A European Journal
Issue Number	24
Volume Number	16
Language	English
Publisher	Wiley-VCH;ChemPubSoc Europe
Publisher Date	2010-06-25
Publisher Place	Germany
Access Restriction	Open
Subject Keyword	Boron Compounds Chemistry Carbazoles Cations Fluorides Iridium Luminescent Agents Organometallic Compounds Crystallography, X-Ray Ligands Models, Molecular Molecular Structure Research Support, Non-U.S. Gov't
Content Type	Text
Resource Type	Article
Subject	Organic Chemistry Catalysis

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