A charged iridophosphor for time-resolved luminescent CO2 gas identification

Yun Ma; Hang Xu; Yi Zeng; Cheuk-Lam Ho; Chung-Hin Chui; Qiang Zhao; Wei Huang; Wai-Yeung Wong

doi:10.1039/C4TC02014F

A charged iridophosphor for time-resolved luminescent CO₂ gas identification†

Yun Ma,^a Hang Xu,^b Yi Zeng,^a Cheuk-Lam Ho,*^a Chung-Hin Chui,^c Qiang Zhao,*^b Wei Huang^b and Wai-Yeung Wong*^ad

* Corresponding authors

^a Institute of Molecular Functional Materials, Department of Chemistry and Partner State Key Laboratory of Environmental and Biological Analysis, Hong Kong Baptist University, Waterloo Road, Hong Kong, P. R. China
E-mail: rwywong@hkbu.edu.hk
Fax: +852-34117348
Tel: +852-34117074

^b Key Laboratory for Organic Electronics & Information Displays (KLOEID) and Institute of Advanced Materials (IAM), Nanjing University of Posts and Telecommunications, Nanjing 210046, P. R. China
E-mail: iamqzhao@njupt.edu.cn
Fax: +86-25-85866396
Tel: + 86-25-85866396

^c Clinical Division, School of Chinese Medicine, Hong Kong Baptist University, Waterloo Road, Hong Kong, P. R. China

^d Institute of Polymer Optoelectronic Materials and Devices, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou 510640, P. R. China

Abstract

A phosphorescent CO₂ gas probe based on an iridium(III) complex with 2-phenylimidazo-[4,5-f][1,10]phenanthroline ligand has been developed. Its phosphorescence is quenched by the addition of CH₃COO⁻. The quenched phosphorescence can be recovered by bubbling CO₂ into the detecting solution. This phosphorescent CO₂ probe exhibits higher photostability and reduced photobleaching than some of the reported organic fluorescent probes. A time-resolved photoluminescence experiment was performed for CO₂ gas detection, which could effectively remove the background fluorescence and improve the sensitivity and signal-to-noise ratio of the sensor in complicated media.

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Article information

DOI: https://doi.org/10.1039/C4TC02014F
Article type: Paper
Submitted: 09 Sep 2014
Accepted: 03 Oct 2014
First published: 10 Oct 2014

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J. Mater. Chem. C, 2015,3, 66-72

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A charged iridophosphor for time-resolved luminescent CO₂ gas identification

Y. Ma, H. Xu, Y. Zeng, C. Ho, C. Chui, Q. Zhao, W. Huang and W. Wong, J. Mater. Chem. C, 2015, 3, 66 DOI: 10.1039/C4TC02014F

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Journal of Materials Chemistry C