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  • Title: Fluorescent asymmetric bis-ureas for pyrophosphate recognition in pure water.
    Author: Casula A, Bazzicalupi C, Bettoschi A, Cadoni E, Coles SJ, Horton PN, Isaia F, Lippolis V, Mapp LK, Marini GM, Montis R, Scorciapino MA, Caltagirone C.
    Journal: Dalton Trans; 2016 Feb 21; 45(7):3078-85. PubMed ID: 26765955.
    Abstract:
    Three fluorescent asymmetric bis-urea receptors (L1-L3) have been synthesised. The binding properties of L1-L3 towards different anions (fluoride, acetate, hydrogencarbonate, dihydrogen phosphate, and hydrogen pyrophosphate HPpi(3-)) have been studied by means of (1)H-NMR, UV-Vis and fluorescence spectroscopy, single crystal X-ray diffraction, and theoretical calculations. In particular, a remarkable affinity for HPpi(3-) has been observed in the case L1 (DMSO-d6/0.5% H2O) which also acts as a fluorimetric chemosensor for this anion. Interestingly, when L1 is included in cetyltrimethylammonium (CTAB) micelles, hydrogen pyrophosphate recognition can also be achieved in pure water.
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