A novel water-soluble chitosan linked fluorescent carbon dots and isophorone diisocyanate fluorescent material toward detection of chromium(VI)

Analytical Methods

Tao Zhang¹  Xin Li¹  Fengxian Qiu¹  Jiangming Pan¹  Jie Wang¹  Dongya Yang¹  Haiyan Wu²  Jicheng Xu²  Xiangheng Niu¹ 

[1] School of Chemistry and Chemical Engineering, Jiangsu University,Zhenjiang,ChinaSchool of Chemistry and Chemical Engineering, Jiangsu University,Zhenjiang,ChinaSchool of Chemistry and Chemical Engineering, Jiangsu University,Zhenjiang,China;School of Chemistry and Chemical Engineering, Jiangsu University,Zhenjiang,ChinaInstitute of Chemical and Materials Engineering, Zhenjiang College,Zhenjiang 212003,ChinaSchool of Chemistry and Chemical Engineering, Jiangsu University,Zhenjiang,ChinaSchool of Chemistry and Chemical Engineering, Jiangsu University,Zhenjiang,ChinaInstitute of Chemical and Materials Engineering, Zhenjiang College,Zhenjiang 212003,ChinaInstitute of Chemical and Materials Engineering, Zhenjiang College,Zhenjiang 212003,ChinaSchool of Chemistry and Chemical Engineering, Jiangsu University,Zhenjiang,ChinaInstitute of Chemical and Materials Engineering, Zhenjiang College,Zhenjiang 212003,China

DOI  :  10.1039/C6AY02822E

学科分类：分析化学

来源: Royal Society of Chemistry

【 摘 要 】

In this work, a NCO-capped intermediate was first prepared from fluorescent carbon dots (FCDs) and isophorone diisocyanate (IPDI) via an in situ method in the presence of dibutyltin dilaurate as the catalyst. Based on the fact that –NCO groups can react with the hydroxyl and amino groups in chitosan polymeric chains, a novel water-soluble chitosan linked fluorescent carbon dots and isophorone diisocyanate (FCDs–IPDI–CTS) fluorescent material was obtained from the NCO-capped intermediate and chitosan. The prepared FCDs–IPDI–CTS material shows blue fluorescence under UV exposure. The structure and morphology of the as-prepared FCDs–IPDI–CTS material were characterized by Fourier transform infrared spectroscopy (FT-IR), X-ray photoelectron spectroscopy (XPS) and transmission electron microscopy (TEM). The as-prepared FCDs–IPDI–CTS material exhibits excellent fluorescence properties and good stability. It could be quenched by chromium(VI) and has been further used as a novel fluorescent probe for selective detection of chromium(VI). The optimum conditions for sensing Cr(VI) were investigated. Based on the optimum conditions, a new sensitive method for sensing Cr(VI) was established. This method has been successfully applied to detect Cr(VI) in water and soil samples with satisfactory results.

【 授权许可】

Unknown