The Recognition and Sensing of Anions through “Positive Allosteric Effects” Using Simple Urea−Amide Receptors
作者:Cidália M. G. dos Santos、Thomas McCabe、Graeme W. Watson、Paul E. Kruger、Thorfinnur Gunnlaugsson
DOI:10.1021/jo8014424
日期:2008.12.5
crystallographic analysis of three simple diaryl-urea based anion receptors possessing an amide moiety on one of the aryl groups, and an electron withdrawing CF(3) group on the other, is described. The three receptors differ only in the position of the amide functionality relative to the hydrogenbondingurea moiety (being para, meta, and ortho for 1, 2, and 3, respectively). This simple modification was shown