Abstract: The interaction and recognition between different anions and 6 kinds of intra molecular charge transfer compounds have been investigated in this paper. It is found that compounds 2, 3, 5 and 6 all possess an excellent ability to the detection of F^-anion. They also show themselves to have nice response to the H₂PO₄^-. And compound 6 has a selectivity for AcO^- over H₂PO₄^- anions. The experimental results have been discussed preliminary. And how to promote the sensitivity and the selectivity of these compounds are also discussed.

Key words: Anionic recognition and detection, Colorimetric method, Hydrogen bonding interaction