Dimerization and Anion Binding of a Fluorescent Phospholipid Analogue

[摘要]：A diarylacetylene fluorophore featuring spatially separated urea and phosphocholine (PC) groups forms a macrocyclic "head-to-tail" dimer stabilized by NHurea center dot center dot center dot OPPC hydrogen bonds. At concentrations above similar to 2 x 10(-5) M in CH2Cl2, the emission intensity of the dimer is quenched by HCO3- and H2PO4- but not by Cl- and NO3-. Under more dilute conditions, all four anions are bound unselectively with association constants on the order of 10(5) M-1.

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