Two closely related iridium(III) complexes as colorimetric and fluorometric chemodosimeters for nitrite in aqueous solution operating along different modes of action

Shu Qinghai; Jan W. Bats; Michael Schmittel

doi:10.1021/ic201753v

Two closely related iridium(III) complexes as colorimetric and fluorometric chemodosimeters for nitrite in aqueous solution operating along different modes of action

Shu Qinghai, Jan W. Bats, Michael Schmittel^*

^*Corresponding author for this work

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

29 Citations (Scopus)

Abstract

Two closely related dual-channel chemodosimeters for nitrite in buffered aqueous acetonitrile were developed using [(pq) ₂IrCl] ₂ (1) and [(ppy) ₂IrCl] ₂ (2). In the UV-vis channel, the addition of nitrite caused visibly distinct color changes with both probes as a result of sizable absorption intensity enhancements. In the photoluminescence channel, the probes behaved oppositely upon the addition of nitrite. The emission was increased with 1, while it was quenched with 2. NMR and X-ray studies indicated that structurally very different η ¹-nitrito-N and η ²-nitrito-O,O′ complexes were formed. Linear relationships for the quantification were obtained in both channels, allowing one to analyze for NO ₂ ^- in a range from 5 × 10 ^-5 to 2 × 10 ^-2 M.

Original language	English
Pages (from-to)	10531-10533
Number of pages	3
Journal	Inorganic Chemistry
Volume	50
Issue number	21
DOIs	https://doi.org/10.1021/ic201753v
Publication status	Published - 7 Nov 2011
Externally published	Yes

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title = "Two closely related iridium(III) complexes as colorimetric and fluorometric chemodosimeters for nitrite in aqueous solution operating along different modes of action",

abstract = "Two closely related dual-channel chemodosimeters for nitrite in buffered aqueous acetonitrile were developed using [(pq) 2IrCl] 2 (1) and [(ppy) 2IrCl] 2 (2). In the UV-vis channel, the addition of nitrite caused visibly distinct color changes with both probes as a result of sizable absorption intensity enhancements. In the photoluminescence channel, the probes behaved oppositely upon the addition of nitrite. The emission was increased with 1, while it was quenched with 2. NMR and X-ray studies indicated that structurally very different η 1-nitrito-N and η 2-nitrito-O,O′ complexes were formed. Linear relationships for the quantification were obtained in both channels, allowing one to analyze for NO 2 - in a range from 5 × 10 -5 to 2 × 10 -2 M.",

author = "Shu Qinghai and Bats, {Jan W.} and Michael Schmittel",

year = "2011",

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volume = "50",

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T1 - Two closely related iridium(III) complexes as colorimetric and fluorometric chemodosimeters for nitrite in aqueous solution operating along different modes of action

AU - Qinghai, Shu

AU - Bats, Jan W.

AU - Schmittel, Michael

PY - 2011/11/7

Y1 - 2011/11/7

N2 - Two closely related dual-channel chemodosimeters for nitrite in buffered aqueous acetonitrile were developed using [(pq) 2IrCl] 2 (1) and [(ppy) 2IrCl] 2 (2). In the UV-vis channel, the addition of nitrite caused visibly distinct color changes with both probes as a result of sizable absorption intensity enhancements. In the photoluminescence channel, the probes behaved oppositely upon the addition of nitrite. The emission was increased with 1, while it was quenched with 2. NMR and X-ray studies indicated that structurally very different η 1-nitrito-N and η 2-nitrito-O,O′ complexes were formed. Linear relationships for the quantification were obtained in both channels, allowing one to analyze for NO 2 - in a range from 5 × 10 -5 to 2 × 10 -2 M.

AB - Two closely related dual-channel chemodosimeters for nitrite in buffered aqueous acetonitrile were developed using [(pq) 2IrCl] 2 (1) and [(ppy) 2IrCl] 2 (2). In the UV-vis channel, the addition of nitrite caused visibly distinct color changes with both probes as a result of sizable absorption intensity enhancements. In the photoluminescence channel, the probes behaved oppositely upon the addition of nitrite. The emission was increased with 1, while it was quenched with 2. NMR and X-ray studies indicated that structurally very different η 1-nitrito-N and η 2-nitrito-O,O′ complexes were formed. Linear relationships for the quantification were obtained in both channels, allowing one to analyze for NO 2 - in a range from 5 × 10 -5 to 2 × 10 -2 M.

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JO - Inorganic Chemistry

JF - Inorganic Chemistry

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Two closely related iridium(III) complexes as colorimetric and fluorometric chemodosimeters for nitrite in aqueous solution operating along different modes of action

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