Fluorescence signaling in anion binding is modulated from quenching to enhancement by intramolecular H-bonding stabilization of anionâionophore adducts; the intramolecular H-bonding is suggested to suppress the quenching processes otherwise possible and increase the conformational rigidity of the anionic adducts, leading to fluorescence enhancement in a selective fashion towards cyanide ion, among the various anions examined.
阴离子结合中的荧光信号通过分子内
氢键稳定阴离子-
离子载体加合物,从淬灭调节为增强;分子内
氢键被认为抑制了可能发生的淬灭过程,并增加了阴离子加合物的构象刚性,从而在各类阴离子中选择性地增强了对
氰离子的荧光增强效果。