The synthesis of water-soluble phosphate pillar[5]arenes functionalized graphene as a fluorescent probe for sensitive detection of paraquat

Xiaoping Tan; Yue Wu; Sha Yu; Tingying Zhang; Hexiang Tian; Shuhua He; Anning Zhao; Yiwen Chen; Quan Gou

doi:10.1016/j.talanta.2018.11.099

The synthesis of water-soluble phosphate pillar[5]arenes functionalized graphene as a fluorescent probe for sensitive detection of paraquat

Talanta. 2019 Apr 1:195:472-479. doi: 10.1016/j.talanta.2018.11.099. Epub 2018 Nov 27.

Authors

Xiaoping Tan¹, Yue Wu², Sha Yu², Tingying Zhang², Hexiang Tian², Shuhua He², Anning Zhao², Yiwen Chen², Quan Gou³

Affiliations

¹ Key Lab of Inorganic Special Functional Materials, Chongqing Municipal Education Commission, School of Chemistry and Chemical Engineering, Yangtze Normal University, Chongqing 408100, China. Electronic address: xptan@yznu.cn.
² Key Lab of Inorganic Special Functional Materials, Chongqing Municipal Education Commission, School of Chemistry and Chemical Engineering, Yangtze Normal University, Chongqing 408100, China.
³ Key Lab of Inorganic Special Functional Materials, Chongqing Municipal Education Commission, School of Chemistry and Chemical Engineering, Yangtze Normal University, Chongqing 408100, China. Electronic address: qouquan@yznu.cn.

PMID: 30625572
DOI: 10.1016/j.talanta.2018.11.099

Abstract

We describe a selective and sensitive fluorescence platform for the detection of paraquat (PQ) based on competitive host-guest recognition between phosphate pillar[5]arenes (PWP5) and probe (Safranine T, ST) with using PWP5 functionalized reduced graphene (PWP5-rGO) as the receptor. PQ is a positive charge molecule that is captured by PWP5 via electrostatic interactions. The host-guest interaction between PWP5 and PQ is studied by ¹H NMR. Therefore, a selective and sensitive fluorescence sensing of detection PQ is developed. It has a linear response ranges of 0.01-2.0 and 2.0-50.0 μM and a low detection limit of 0.0035 μM (S/N = 3) for PQ. The sensing platform is also used to test PQ in two water samples with satisfying results. It suggests that this approach has potential applications for the determination of PQ.

Keywords: Host–guest recognition; Paraquat; Phosphate pillar[5]arenes; Reduced graphene.