The design, synthesis, and the photophysical properties of a Low Molecular Weight Gel (LMWG) based on AB3 and AB2 type poly(aryl ether) dendrons with an anthracene chromophore attached through an acylhydrazone linkage are described. The gel is utilized for an efficient ‘naked eye’ detection of fluoride ions (as low as 0.1 equiv with respect to the gelator concentration), through a reversible gel–sol transition, which is associated with a color change from deep yellow to bright red.
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