A simple amide fluorescent sensor based on quinoline for selective and sensitive recognition of zinc(II) ions and bioimaging in living cells

Haiyang Liu, Ying Tan, Qiuzi Dai, Hongda Liang, Jun Song, Junle Qu, Wai Yeung Wong

Research output: Journal article publicationJournal articleAcademic researchpeer-review

43 Citations (Scopus)

Abstract

A simple quinoline-based derivative (AQDPA) was developed as a highly efficient fluorescent sensor for sensing Zn 2+ and sequential recognition of pyrophosphate and sulfur ions. This chemosensor was synthesized from diisopropylamine and 2-chloro-N-(quinolin-8-yl)acetamide. The non-fluorescence sensor displayed significant and specific fluorescence enhancement after binding to Zn 2+ with high selectivity. The fluorescence titration analysis shows a detection limit for Zn 2+ at 4.1 × 10 −8 M. The sensing mechanisms of AQDPA binding to Zn 2+ were supported by 1 H NMR, HR-MS analysis, and density functional theory (DFT) study. Moreover, the fluorescence imaging in HeLa cells suggested that this simple sensor had great potential in the application of biological imaging.

Original languageEnglish
Pages (from-to)312-318
Number of pages7
JournalDyes and Pigments
Volume158
DOIs
Publication statusPublished - 1 Nov 2018

Keywords

  • DFT
  • Fluorescence imaging
  • Fluorescent sensor
  • Quinoline
  • Zinc ion

ASJC Scopus subject areas

  • General Chemical Engineering
  • Process Chemistry and Technology

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