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Dual photoluminescence centers from inorganic-salt-functionalized carbon dots for ratiometric pH sensing

Abstract

A controlled and effective strategy for synthesizing carbon dots (CDs) with dual photoluminescence (PL) peaks is presented in this report which involved employing coal-based CDs as seeds, along with appropriate diammonium phosphate (DAP) served as componential conditioner. The formation of dual PL color CDs (D-CDs) mainly depends on reaction temperature and thermally induced surface remodification of coal-based CDs with DAP. The origin of dual PL peak emissions are attributed to the presence of grafted N- and P-related groups on CDs through DAP functionalization. The synthesized D-CDs show a distinct pH-sensitive behavior under optimized laboratory conditions. Accordingly, a fluorescent ratiometric probe is developed based on these CDs for the detection of pH distribution and variation over a broad range in a complex system with interfering metal ions.

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Publication details

The article was received on 21 Jul 2017, accepted on 06 Sep 2017 and first published on 06 Sep 2017


Article type: Communication
DOI: 10.1039/C7TC03266H
Citation: J. Mater. Chem. C, 2017, Accepted Manuscript
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    Dual photoluminescence centers from inorganic-salt-functionalized carbon dots for ratiometric pH sensing

    S. Hu, X. Meng, F. Tian, W. Yang, N. Li, C. Xue, J. Yang and Q. Chang, J. Mater. Chem. C, 2017, Accepted Manuscript , DOI: 10.1039/C7TC03266H

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