Synthesis and characterization of 9-(cycloheptatrienylidene)fluorene derivatives: acid-triggered "switch on"of fluorophores.
A series of 9-(cycloheptatrienylidene)fluorene derivatives were synthesized in good yields through the Suzuki or Sonogashira cross-coupling reactions. Fluorescence "off-on" behaviors of these compounds were investigated on the basis of variable acid concentrations. These compounds were shown to be acid-sensing fluorophores with utility as indicators in acidic environments.
Wang
Zixing
Z
Chemistry Department, Zhejiang University, Hangzhou, 310027, P. R. China.
Xing
Yajun
Y
Shao
Hongxia
H
Lu
Ping
P
Weber
William P
WP