A reversible and highly selective phosphorescent sensor for Hg2+ based on iridium (III) complex

Qunbo Mei; Qingfang Hua; Bihai Tong; Yujie Shi; Chen Chen; Wei Huang

doi:10.1016/j.tet.2015.08.075

A reversible and highly selective phosphorescent sensor for Hg²⁺ based on iridium (III) complex

Qunbo Mei, Qingfang Hua, Bihai Tong, Yujie Shi, Chen Chen, Wei Huang

Research output: Contribution to journal › Article › peer-review

20 Scopus citations

Abstract

A novel reversible phosphorescent sensor for Hg²⁺ based on a neutral iridium (III) complex Ir(TBT)₂(pic) (TBT=2-thiophen-2-yl-benzothiazole, pic=picolinate) has been synthesized and characterized. Ir(TBT)₂(pic) displayed relatively strong phosphorescent nearly centered at about 600 nm. Upon addition of acetonitrile (CH₃CN) solution of Hg²⁺, the dichloromethane (DCM) solution of Ir(TBT)₂(pic) gave a visual color change from orange to yellow and significant phosphorescent quenching. It can serve as a highly selective sensor for Hg²⁺ with naked-eye detection. The sensor allow determination of Hg²⁺ in the working range of 4.0 μM-12.0 μM with a detection limit of 1.04 μM. When mixing with Hg²⁺, Ir(TBT)₂(pic) interacted with Hg²⁺ in a 1:2 stoichiometry via a coordination bond interaction between the sulfur atom and Hg²⁺. The phosphorescent chemosensor exhibited excellent selectivity and sensitivity for Hg²⁺ detection. The spectral response of Ir(TBT)₂(pic) toward Hg²⁺ was proved to be reversible.

Original language	English
Pages (from-to)	9366-9370
Number of pages	5
Journal	Tetrahedron
Volume	71
Issue number	49
DOIs	https://doi.org/10.1016/j.tet.2015.08.075
State	Published - 9 Dec 2015
Externally published	Yes

Keywords

2-Thiophen-2-yl-benzothiazole
Hg
Iridium (III) complex
Phosphorescent chemosensor

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10.1016/j.tet.2015.08.075

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title = "A reversible and highly selective phosphorescent sensor for Hg2+ based on iridium (III) complex",

abstract = "A novel reversible phosphorescent sensor for Hg2+ based on a neutral iridium (III) complex Ir(TBT)2(pic) (TBT=2-thiophen-2-yl-benzothiazole, pic=picolinate) has been synthesized and characterized. Ir(TBT)2(pic) displayed relatively strong phosphorescent nearly centered at about 600 nm. Upon addition of acetonitrile (CH3CN) solution of Hg2+, the dichloromethane (DCM) solution of Ir(TBT)2(pic) gave a visual color change from orange to yellow and significant phosphorescent quenching. It can serve as a highly selective sensor for Hg2+ with naked-eye detection. The sensor allow determination of Hg2+ in the working range of 4.0 μM-12.0 μM with a detection limit of 1.04 μM. When mixing with Hg2+, Ir(TBT)2(pic) interacted with Hg2+ in a 1:2 stoichiometry via a coordination bond interaction between the sulfur atom and Hg2+. The phosphorescent chemosensor exhibited excellent selectivity and sensitivity for Hg2+ detection. The spectral response of Ir(TBT)2(pic) toward Hg2+ was proved to be reversible.",

keywords = "2-Thiophen-2-yl-benzothiazole, Hg, Iridium (III) complex, Phosphorescent chemosensor",

author = "Qunbo Mei and Qingfang Hua and Bihai Tong and Yujie Shi and Chen Chen and Wei Huang",

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T1 - A reversible and highly selective phosphorescent sensor for Hg2+ based on iridium (III) complex

AU - Mei, Qunbo

AU - Hua, Qingfang

AU - Tong, Bihai

AU - Shi, Yujie

AU - Chen, Chen

AU - Huang, Wei

PY - 2015/12/9

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N2 - A novel reversible phosphorescent sensor for Hg2+ based on a neutral iridium (III) complex Ir(TBT)2(pic) (TBT=2-thiophen-2-yl-benzothiazole, pic=picolinate) has been synthesized and characterized. Ir(TBT)2(pic) displayed relatively strong phosphorescent nearly centered at about 600 nm. Upon addition of acetonitrile (CH3CN) solution of Hg2+, the dichloromethane (DCM) solution of Ir(TBT)2(pic) gave a visual color change from orange to yellow and significant phosphorescent quenching. It can serve as a highly selective sensor for Hg2+ with naked-eye detection. The sensor allow determination of Hg2+ in the working range of 4.0 μM-12.0 μM with a detection limit of 1.04 μM. When mixing with Hg2+, Ir(TBT)2(pic) interacted with Hg2+ in a 1:2 stoichiometry via a coordination bond interaction between the sulfur atom and Hg2+. The phosphorescent chemosensor exhibited excellent selectivity and sensitivity for Hg2+ detection. The spectral response of Ir(TBT)2(pic) toward Hg2+ was proved to be reversible.

AB - A novel reversible phosphorescent sensor for Hg2+ based on a neutral iridium (III) complex Ir(TBT)2(pic) (TBT=2-thiophen-2-yl-benzothiazole, pic=picolinate) has been synthesized and characterized. Ir(TBT)2(pic) displayed relatively strong phosphorescent nearly centered at about 600 nm. Upon addition of acetonitrile (CH3CN) solution of Hg2+, the dichloromethane (DCM) solution of Ir(TBT)2(pic) gave a visual color change from orange to yellow and significant phosphorescent quenching. It can serve as a highly selective sensor for Hg2+ with naked-eye detection. The sensor allow determination of Hg2+ in the working range of 4.0 μM-12.0 μM with a detection limit of 1.04 μM. When mixing with Hg2+, Ir(TBT)2(pic) interacted with Hg2+ in a 1:2 stoichiometry via a coordination bond interaction between the sulfur atom and Hg2+. The phosphorescent chemosensor exhibited excellent selectivity and sensitivity for Hg2+ detection. The spectral response of Ir(TBT)2(pic) toward Hg2+ was proved to be reversible.

KW - 2-Thiophen-2-yl-benzothiazole

KW - Hg

KW - Iridium (III) complex

KW - Phosphorescent chemosensor

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ER -

A reversible and highly selective phosphorescent sensor for Hg²⁺ based on iridium (III) complex

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Keywords

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