Journal
JOURNAL OF MATERIALS CHEMISTRY
Volume 15, Issue 27-28, Pages 2836-2839Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/b500766f
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The development and intracellular applications of a water-soluble Zn(II) sensor (WZS) are described. 4-Aminonaphthalimide is used as the fluorophore of WZS for its high photostability, long excitation and emission wavelength, large Stokes' shift and inert response to pH. N,N- Bis(2pyridylmethyl) ethylenediamine (BPEN), used as a receptor for Zn( II), is attached to the fluorophore through a rigid benzene framework on the imide moiety. Spectroscopic studies indicate that this fluorophore-receptor linking strategy could be used for the development of effective photoinduced electron transfer (PET) sensors. WZS is pH-insensitive and shows high selectivity for Zn(II) against other biologically relevant metal ions. Cellular applications revealed that WZS could be used for the imaging of intracellular Zn(II).
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