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A cyanine-derived near-infrared molecular rotor for ratiometric imaging of mitochondrial viscosity in cells

  • Xueluer Mu
  • , Yang Liu
  • , Shengsen Liu
  • , Yilin Sun
  • , Nana Lu
  • , Yingxi Lu
  • , Weiqi Li
  • , Xianfeng Zhou*
  • , Bin Liu
  • , Zhibo Li
  • *Corresponding author for this work
  • Qingdao University of Science and Technology
  • School of Chemistry and Chemical Engineering, Harbin Institute of Technology
  • University of Akron
  • Shenzhen University

Research output: Contribution to journalArticlepeer-review

Abstract

We developed a new cyanine-derived near-infrared (NIR) molecular rotor Mu1, which is superior to the traditional cyanines with high viscosity response, large Stokes shift (˜100 nm), and high photo-stability to detect the microscopic viscosity ratiometrically. The time-dependent density functional theory calculations highlighted the structure-optical properties of Mu1 as molecular rotor. Due to the mitochondria-actived fluorescence characteristics, Mu1 was used to track mitochondrial viscosity changes in live cells with high spatial and temporal resolution. This new type of NIR molecular rotor presented herein may open up new opportunities of NIR sensors for biomedical diagnosis and imaging applications.

Original languageEnglish
Article number126831
JournalSensors and Actuators B: Chemical
Volume298
DOIs
StatePublished - 1 Nov 2019

Keywords

  • Cyanine-derived
  • Mitochondrial viscosity
  • Molecular rotor
  • Near-infrared fluorescence
  • Ratiometric sensing

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