Journal
BIOORGANIC & MEDICINAL CHEMISTRY LETTERS
Volume 15, Issue 7, Pages 1851-1855Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.bmcl.2005.02.017
Keywords
fluorescence; sodium indicator; fluoroionophore
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The synthesis and metal binding properties of cation-sensitive fluorescent indicators intended for biological applications are described. The increase of the crown ether ring size enhances the affinity for larger cations, but weakens the fluorescent response and selectivity. A compound having a 15-crown-5 chelator directly attached to a 2,7-difluoroxanthenone fluorophore loads into live cells and responds to sodium ion concentration changes with large fluorescence increases in the visible wavelength range. (c) 2005 Elsevier Ltd. All rights reserved.
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