Selective fluorescent recognition of Zn2+ by using chiral binaphthol-pyrene probes

Mukesh Eknath Shirbhate, Yerin Jeong, Gyeongju Ko, Gain Baek, Gyoungmi Kim, Yong Uk Kwon, Kwan Mook Kim, Juyoung Yoon

Research output: Contribution to journalArticlepeer-review

24 Scopus citations

Abstract

The bis-binaphthol-pyrene derivative 1 (R isomer) and 2 (S isomer) selectively sense Zn2+ by undergoing a reversible fluorescent emission enhancement at 550 nm. Moreover, upon addition of Zn2+, the magnitude of the peak in the CD spectrum of 1 at 289 nm increases and the intensity of the peak at 272 nm decreases. Opposite changes were observed for 2 upon the addition Zn2+. The distinctive fluorescence and ratiometric CD spectral changes are attributed to a change in the dihedral angle between the binaphthol groups in 1 and 2 caused by Zn2+ binding. Probe 1 was further employed to image Zn2+ in cells.

Original languageEnglish
Pages (from-to)29-35
Number of pages7
JournalDyes and Pigments
Volume167
DOIs
StatePublished - Aug 2019

Keywords

  • Binapthol
  • Circular dichroism
  • Fluorescent chemosensor for Zn
  • Fluorescent probe for Zn
  • Zn imaging in cells

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