title: Ion-mediated single-molecular optical switching and sensing based on the fluorophore-tethered calix[4]pyrrole.
abstract: The design and synthesis of the first asymmetrically "two-walled"meso-substituted calix[4]pyrrole tethered by a fluorophore and its subsequent implication as an archetype sequential 'on-off-on-off' fluorescent single-molecular switch are reported. The current system permits us to extend the sensitivity up to sub-nanomolar levels with the detection limit as low as 0.4 nM.
authors.affiliation: Department of Chemistry, Kangwon National University, Chun Cheon 200-701, Korea. chhlee@kangwon.ac.kr.
authors.forename: Divya
authors.initials: D
authors.lastname: Sareen
authors.forename: Ji Hye
authors.initials: JH
authors.lastname: Lee
authors.forename: Hyonseok
authors.initials: H
authors.lastname: Hwang
authors.forename: Soeun
authors.initials: S
authors.lastname: Yoo
authors.forename: Chang-Hee
authors.initials: CH
authors.lastname: Lee