Synthesis of biindole-diazo conjugates as a colorimetric anion receptor.
A colorimetric anion receptor based on an indole scaffold has been synthesized by incorporating an azobenzene chromophore to the 5-position of indole. The receptor binds anions by hydrogen bonds which are effectively transmitted through resonance to the chromophore to give rise to color changes. The cyanide ion induced a pronounced color change from light yellow to reddish orange, but less intense or negligible changes were observed with the other anions examined here.
Lee
Gang Woo
GW
Center of Bioactive Molecular Hybrids and Department of Chemistry, Yonsei University, Seoul 120-749, Korea.
Kim
Nam-Kyun
NK
Jeong
Kyu-Sung
KS
D000838:Anions / Q000737:chemistry; D001391:Azo Compounds / Q000138:chemical synthesis* / Q000737:chemistry; D003124:Colorimetry; D007211:Indoles / Q000138:chemical synthesis* / Q000737:chemistry; D009682:Magnetic Resonance Spectroscopy; D015394:Molecular Structure
D000838:Anions; D001391:Azo Compounds; D007211:Indoles