S. Kumar et al., SYNTHESIS AND ASSOCIATION BEHAVIOR OF PYRIDINE BASED 18-MEMBERED DIAMIDE - DIESTER - THIOETHER MACROCYCLES, Tetrahedron letters, 37(12), 1996, pp. 2071-2072
Macrocycles; 5 lacking intramolecular hydrogen bonding and 4 and 6 wit
h three dimensionally organised ligating sites bind Ag+ with remarkabl
e selectivity.