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Issue 42, 2016
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Time–oxygen & light indicating via photooxidation mediated up-conversion

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Abstract

Photooxidation is a major threat to perishable products. Therefore, an effective monitoring system for photooxidation reactions is urgently needed due to safety concerns. Herein, a time–oxygen & light indicator (TOLI) from a non-emissive stealth upconversion system is demonstrated to address this issue. Under photooxidation stress, a nonluminous precursor 9,10-bis(diphenylphosphino)anthracene (M1) is photo-oxidized to an efficient emitter 9,10-bis(diphenylphosphoryl)anthracene (M2), and triplet–triplet annihilation (TTA)-based upconversion emission is observed. The reaction rate is easily tunable and responsive to oxygen concentration and light intensity. Over a period of time, the enhanced emission related to the degree of photooxidation is ultimately used as an indicating signal. Thus a TOLI based on the TTA-upconversion process is achieved. This work not only develops a rational approach to the visualization and monitoring of photooxidation, but also demonstrates the varied control of the TTA-upconversion process.

Graphical abstract: Time–oxygen & light indicating via photooxidation mediated up-conversion

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Publication details

The article was received on 18 Sep 2016, accepted on 06 Oct 2016 and first published on 06 Oct 2016


Article type: Paper
DOI: 10.1039/C6TC04073J
Citation: J. Mater. Chem. C, 2016,4, 9986-9992
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    Time–oxygen & light indicating via photooxidation mediated up-conversion

    M. Xu, C. Han, Y. Yang, Z. Shen, W. Feng and F. Li, J. Mater. Chem. C, 2016, 4, 9986
    DOI: 10.1039/C6TC04073J

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