Paper

New J. Chem., 2009, 33, 1965 - 1972, DOI: 10.1039/b909536e

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Anthracene-based open and macrocyclic receptors in the flurometric detection of urea

Kumaresh Ghosh and Goutam Masanta

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Anthracene-based open and macrocyclic receptors 1 and 2 have been designed and synthesized for the recognition of urea in less polar CHCl₃ and more polar CH₃CN solvents. Receptor 1 binds urea strongly in CHCl₃ and exhibits a significant increase in the emission of the anthracene. Macrocyclic analogue 2 shows higher binding and good sensibility towards urea due to the macrocyclic effect. In CH₃CN, the binding constant values are lower in magnitude, but the trend is similar to that seen in CHCl₃. Both the receptors 1 and 2 are examples of PET sensors for the recognition of urea.

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