Fabrication of fluorescent carbon dots-linked isophorone diisocyanate and β-cyclodextrin for detection of chromium ions

Jie Wang; Fengxian Qiu; Haiyan Wu; Xin Li; Tao Zhang; Xiangheng Niu; Dongya Yang; Jiangming Pan; Jicheng Xu

doi:10.1016/j.saa.2017.02.031

Fabrication of fluorescent carbon dots-linked isophorone diisocyanate and β-cyclodextrin for detection of chromium ions

Spectrochim Acta A Mol Biomol Spectrosc. 2017 May 15:179:163-170. doi: 10.1016/j.saa.2017.02.031. Epub 2017 Feb 20.

Authors

Jie Wang¹, Fengxian Qiu², Haiyan Wu³, Xin Li¹, Tao Zhang¹, Xiangheng Niu¹, Dongya Yang¹, Jiangming Pan¹, Jicheng Xu³

Affiliations

¹ School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, China.
² School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, China. Electronic address: fxqiu@ujs.edu.cn.
³ School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, China; Institute of Chemical and Materials Engineering, Zhenjiang College, Zhenjiang 212003, China.

PMID: 28242445
DOI: 10.1016/j.saa.2017.02.031

Abstract

A water-soluble fluorescent carbon dots (FCDs) from cellulose was prepared using one-pot simple hydrothermal method. In this work, a novel fluorescent probe material, fluorescent carbon dots-linked isophorone diisocyanate and β-cyclodextrin (FCDs-IPDI-CD), was prepared with FCDs, isophorone diisocyanate (IPDI) and β-cyclodextrin (β-CD) as raw materials. The structure and morphology of FCDs-IPDI-CD were characterized using the Fourier transform infrared spectroscopy (FT-IR) and transmission electron microscopy (TEM). The as-prepared FCDs-IPDI-CD exhibits excellent emission property and high stability. The fluorescence of the FCDs-IPDI-CD could be quenched by Cr(VI) ions, and the results indicate that FCDs-IPDI-CD can be used as an effective fluorescent probe for the detection of Cr(VI) ions with good selectivity and sensitivity in an aqueous solution. The influences of environment factors (such as pH, reaction time) on relative fluorescence intensity were studied. According to the optimum conditions, a new sensitive method detecting Cr(VI) ions was established. The method has been successfully applied to detect Cr(VI) ions in water and soil samples with satisfactory results.

Keywords: Carbon dots; Cr(VI) ions; Isophorone diisocyanate; Quenching; β-Cyclodextrin.