Journal
DYES AND PIGMENTS
Volume 167, Issue -, Pages 29-35Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.dyepig.2019.03.063
Keywords
Fluorescent probe for Zn2+; Binapthol; Circular dichroism; Zn2+ imaging in cells; Fluorescent chemosensor for Zn2+
Funding
- National Creative Research Initiative Program of the National Research Foundation of Korea - Korean government (MSIP) [2012R1A3A2048814]
- Korean government (MSIP) [NRF-2017R1A2B2009672]
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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.
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