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A colourimetric calix[4]pyrrole–4-nitrophenolate based anion sensor

By Philip A. Gale, Lance J. Twyman, Cristin I. Handlin and Jonathan L. Sessler


The intense yellow colour of the 4-nitrophenolate anion 2, in acetonitrile or dichloromethane solution, dissipates upon complex formation with meso-octamethylcalix[4]pyrrole 1. <br/>The complex may be used as a colourimetric sensor for halide anions, such as fluoride, that displace the phenolate anion thereby restoring the yellow colour, characteristic of free 4-nitrophenolate anion, to solutions containing 1, 2, and the anion in question

Topics: QD
Year: 1999
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Provided by: e-Prints Soton
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