Exploring the interaction of anthracene-containing macrocyclic chemosensors with silver(I) and cadmium(II) ions - Photophysical and structural studies

The four anthracene-containing macrocycles 7-(9-anthracenylmethyl)-3,1 1-dithia-7,17-diazabicyclo[11.3.1]heptadeca1(17),13,15-triene (L1), 7-(10-methyl-9-anthracenylmethyl)-3,11-dithia-7,17-diazabicyclo[11.3.1]heptadeca-1(17),13,15-triene (L2), 7,7'-[9,10-anthracenediylbis(methylene)]bis-3,11-dithia-7,17-diazabicyclo[11.3.1]heptadeca-1(17),13,15-triene (L3), and 11,-(anthracen-9-ylmethyl)-1,4,7-trithia-11-azacyclotetradecane (L4), have been explored as fluorescent chemosensors for the sensing of the d metal ions Ag-I and Cd-II. The compositions of the formed species have been determined from absorption and fluorescence titrations. The binding properties of L1 were also studied in the solid state. The synthesis and crystallographic characterization of complex [Cd(NO3)(2)(L1)] are discussed.