Synthesis of double-armed lariat ethers with pyrene moieties at each end of two sidearms and their fluorescence properties in the presence of alkali metal and alkaline …
Two types of double-armed lariat ether derivatives having pyrene moieties at each end of two sidearms,(3 x+ 1)-crown-x derivatives 1 (x= 5), 2 (x= 6), and 3 (x= 4)(type A) and 3y- crown-y derivatives, 6 (y= 5) and 7 (y= 6)(type B), were synthesized, and their complexation behavior toward alkali metal and alkaline earth metal cations was examined by fluorescence spectroscopy. Pyrene excimer emission decreased accompanied by an increase in ...
