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Simple and Efficient Phosphorescent Probe for Iodide-Specific Detection Based on Crystallization-Induced Phosphorescence of Organic Ionic Crystals

Abstract

It is very challenging to develop luminescent detection methods for iodide ion due to its significant fluorescence quenching to general fluorophores induced by heavy-atom effect. Herein, we reveal unique crystallization-induced bright phosphorescence of tetraphenylphosphonium iodide (TPP I), and develop a first time-gated detection method for iodide ion to minimize the autofluorescence from complex biological samples. Both the involvement of heavy iodide ion and accessible ionic interaction-induced organic crystals contribute to the accomplishment of a very high phosphorescence quantum yield (0.42) for TPP I. This specific iodide-triggered bright organic phosphorescence enables the development of a first time-gated detection method for iodide ion in the luminescence turn-on manner, and further offers an opportunity to establish a facile test strip for visualized detection of iodide ion based on solid-state phosphorescence on a solid substrate. Excellent performance of this probe in imaging iodide in live cells and intriguing use in double encryption illustrate versatile and broad application prospects of highly efficient organic ionic crystals in various areas.

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Publication details

The article was received on 21 Sep 2018, accepted on 22 Nov 2018 and first published on 24 Nov 2018


Article type: Communication
DOI: 10.1039/C8TC04781B
Citation: J. Mater. Chem. C, 2018, Accepted Manuscript
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    Simple and Efficient Phosphorescent Probe for Iodide-Specific Detection Based on Crystallization-Induced Phosphorescence of Organic Ionic Crystals

    G. Chen, J. Zhou, H. Feng, F. Feng, P. Xu, S. Pan, J. Xu and Z. Qian, J. Mater. Chem. C, 2018, Accepted Manuscript , DOI: 10.1039/C8TC04781B

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