Fluoride ion coordination-induced turn-on fluorescence of tailored N-methyl N-confused tripyrromonomethene analogues

Structural isolation of two unprecedented AIEE/ACQ type fluorophores based on N-methyl N-confused tripyrromonomethene analogues exhibiting selective F- anion-coordination-induced-enhanced emission (ACIEE) with a detection limit of 10(-7) M is reported. The intrinsic relation between molecular structures/molecular arrangements with (without) anion binding have been revealed at a deeper level via spectroscopic measurements and DFT level theoretical studies.