4.6 Article

A salicylaldehyde benzoyl hydrazone based near-infrared probe for copper(ii) and its bioimaging applications

期刊

RSC ADVANCES
卷 12, 期 5, 页码 3073-3080

出版社

ROYAL SOC CHEMISTRY
DOI: 10.1039/d1ra08616b

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资金

  1. Health Industry Scientific Research Project of Gansu Province [GSWSKY2020-70, GAU-KYQD-2019-23]
  2. National Natural Science Foundation of China [21804135]
  3. Natural Science Foundation of Gansu Province [20JR5RA133]

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Developing highly sensitive and selective methods for Cu2+ detection in living systems is of great significance in clinical copper-related disease diagnosis. In this study, a near infrared fluorescent probe CySBH was designed and synthesized for real-time tracking and visualization of Cu2+ in living cells, showing excellent selectivity and sensitivity.
Developing highly sensitive and selective methods for Cu2+ detection in living systems is of great significance in clinical copper-related disease diagnosis. In this work, a near infrared (NIR) fluorescent probe, CySBH, with a salicylaldehyde benzoyl hydrazone group as a selective and sensitive receptor for Cu2+ was designed and synthesized. The specific coordination of the salicylaldehyde benzoyl hydrazone group in CySBH with Cu2+ can induce a distinct quench of the fluorescence intensity, allowing for real-time tracking of Cu2+. We have demonstrated that CySBH could rapidly recognize Cu2+ with good selectivity and high sensitivity. Moreover, on the basis of low cell cytotoxicity, the probe was used to visualize Cu2+ in two cell lines by fluorescence imaging. Furthermore, CySBH can also be used to monitor Cu(2+)in vivo due to its NIR emission properties. These overall results illustrate that the NIR fluorescent probe CySBH provides a novel approach for the selective and sensitive monitoring of Cu2+ in living systems.

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