Effective recognition of multiple anions by an azobenzene–Al3+ system
Effective recognition of multiple anions by an azobenzene–Al3+ system
A ready-to-use multifunctional coordinative system, 2,2’-dihydroxyazobenzene –aluminum (III) (DHAB–Al3+), was created to recognize several anions effectively through three channels, namely colorimetric detection, UV-Vis spectroscopy, and fluorescence spectroscopy. Under naked eye visualization, the H2PO−4 can be readily distinguished from the other anions by the DHAB–Al3+ system through a change in color from reddish-orange to light yellow.