ELECTROGENERATED CHEMILUMINESCENCE BEHAVIOR OF A Ru(bpy)32+ SYSTEM ON A PARAFFIN-IMPREGNATED GRAPHITE ELECTRODE

Li, F; Cui, Hua; Lin, Xucong

doi:10.1142/9789812776624_0035

Cited by 1 publication

(1 citation statement)

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“…Strikingly, the metal ions exhibited distinct quenching/enhancement of the ECL signal at different driven potentials. On the basis of the preliminary "fingerprint" (ECL quenching or enhancement at cathodic and anodic potentials, respectively) and the linear relationship between the ECL It should be noted that, although in pioneering work it was demonstrated that the applied potential can be exploited to selectively elicit ECL (also called potential resolved ECL) within a single luminophor, 41,42 few ECL sensors, especially those based on GPPCN, have been successfully developed based on this principle so far. 8 The proposed strategy of modulating multiple-ECL signals of GPPCN would pave more reliable and promising applications of carbon-rich materials in sensing and other essential state-dependent responses.…”

Section: ■ Introductionmentioning

confidence: 99%

Potential-Modulated Electrochemiluminescence of Carbon Nitride Nanosheets for Dual-Signal Sensing of Metal Ions

Shang

Zhou

Shen

et al. 2015

ACS Appl. Mater. Interfaces

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As an emerging semiconductor, graphite-phase polymeric carbon nitride (GPPCN) has drawn much attention not only in photocatalysis but also in optical sensors such as electrochemiluminescence (ECL) sensing of metal ions. However, when the concentrations of interfering metal ions are several times higher than that of the target metal ion, it is almost impossible to distinguish which metal ion changes the ECL signals in real sample detection. Herein, we report that the dual-ECL signals could be actuated by different ECL reactions merely from GPPCN nanosheets at anodic and cathodic potentials, respectively. Interestingly, the different metal ions exhibited distinct quenching/enhancement of the ECL signal at different driven potentials, presumably ascribed to the diversity of energy-level matches between the metal ions and GPPCN nanosheets and catalytic interactions of the intermediate species in ECL reactions. On this basis, without any labeling and masking reagents, the accuracy and reliability of sensors based on the ECL of GPPCN nanosheets toward metal ions were largely improved; thus, the false-positive result caused by interferential metal ions could be effectively avoided. As an example, the proposed GPPCN ECL sensor with a detection limit of 1.13 nM was successfully applied for the detection of trace Ni(2+) ion in tap and lake water.

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Section: ■ Introductionmentioning

confidence: 99%