A phosphorescent Ir( iii ) complex with formamide for the luminescence determination of low-level water content in organic solvents

A phosphorescent water probe based on an Ir( iii ) complex with 5-formamide-1,10-phenanthroline as an N^N ligand has been designed and synthesized. Its phosphorescence emission can be quenched by the addition of a fluoride anion through a deprotonation process occurring in –NH and it can be recovere...

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Published inJournal of materials chemistry. C, Materials for optical and electronic devices Vol. 4; no. 25; pp. 6110 - 6116
Main Authors Guo, Song, Ma, Yun, Liu, Shujuan, Yu, Qi, Xu, Aqiang, Han, Jianmei, Wei, Liuwei, Zhao, Qiang, Huang, Wei
Format Journal Article
LanguageEnglish
Published 01.01.2016
Subjects
Complex systems
Emission
Ligands
Luminescence
Moisture content
Phosphorescence
Quenching (cooling)
Solvents
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Summary:A phosphorescent water probe based on an Ir( iii ) complex with 5-formamide-1,10-phenanthroline as an N^N ligand has been designed and synthesized. Its phosphorescence emission can be quenched by the addition of a fluoride anion through a deprotonation process occurring in –NH and it can be recovered by adding a trace amount of water to the detecting solution. Based on this performance, the phosphorescent probe has been utilized to determine the water content in organic solvents, which shows low limit of detection (LOD) and limit of quantitation (LOQ). Furthermore, taking advantage of the long emission lifetime of the phosphorescence signal, a time-resolved photoluminescence experiment was performed for detecting the water content, which could effectively eliminate the fluorescence background and improve the sensitivity and the signal-to-noise ratio of detection in complex systems.
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ISSN:2050-7526
2050-7534
DOI:10.1039/C6TC01586G