Conjugation of Azide-functionalised CdSe/ZnS Quantum Dots with Tetrakis(5-hexyn-oxy) Fe(II) phthalocyanine via Click Chemistry for Electrocatalysis

• Azide-funtionalised CdSe/ZnS quantum dots are conjugated with tetrakis(5-hexyn-oxy) Fe(II) phthalocyanine by click chemistry.
• The conjugate is used for the electrocatalytic detection of paraquat.
• Low limits of detection were obtained which is an improvement compared to any reported in literature for paraquat.

In this work, azide-funtionalised CdSe/ZnS QDs are conjugated with tetrakis(5-hexyn-oxy) Fe(II) phthalocyanine for the electrocatalytic detection of paraquat. The conjugate was fully characterised using various techniques to confirm the success of the reaction. They also showed good electrocatalytic ability towards the electroreduction of paraquat with limits of detection (LoD) of 5.9 × 10−9 μM which is a great improvement compared to other reported sensors for this analyte.

Azide-funtionalised CdSe/ZnS quantum dots are conjugated with tetrakis(5-hexyn-oxy)Fe(II) phthalocyanine for the electrocatalytic detection of paraquat, resulting in an improved detection limits of 5.9 × 10−9 μM.Figure optionsDownload as PowerPoint slide