title: Synthesis and characterization of 9-(cycloheptatrienylidene)fluorene derivatives: acid-triggered "switch on"of fluorophores.
abstract: 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.
authors.affiliation: Chemistry Department, Zhejiang University, Hangzhou, 310027, P. R. China.
authors.forename: Zixing
authors.initials: Z
authors.lastname: Wang
authors.forename: Yajun
authors.initials: Y
authors.lastname: Xing
authors.forename: Hongxia
authors.initials: H
authors.lastname: Shao
authors.forename: Ping
authors.initials: P
authors.lastname: Lu
authors.forename: William P
authors.initials: WP
authors.lastname: Weber