title: A novel flavone-based fluorescent probe for relay recognition of HSO3(-) and Al(3+).
abstract: In this work, a new flavone-based fluorescent probe 3-hydroxy-3'-formylflavone (3HFF) was designed to achieve highly selective relay recognition of HSO3(-) and Al(3+) in DMSO-H2O (2:8, v/v) solution. 3HFF displayed a highly selective response to HSO3(-) with a green fluorescence appearing at 524 nm. Moreover, the in situ generated 3HFF+HSO3(-) system demonstrated eminent relay recognition capability for Al(3+) with a blue fluorescence appearing at 453 nm by the formation of a 1:1 complex between 3HFF and Al(3+) in DMSO-H2O (2:8, v/v) solution. However, only slight change was observed in emission intensity with addition of Al(3+) to 3HFF, and indicated HSO3(-) was essential for the sensing of Al(3+). This work achieves the detection of HSO3(-) and Al(3+) by only one probe and provides another example for this rare combination (anion/metal).
authors.affiliation: School of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China.
authors.forename: Shuai
authors.initials: S
authors.lastname: Xu
authors.affiliation: School of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China. Electronic address: trr@csu.edu.cn.
authors.forename: Ruiren
authors.initials: R
authors.lastname: Tang
authors.affiliation: School of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China.
authors.forename: Zhen
authors.initials: Z
authors.lastname: Wang
authors.affiliation: School of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China.
authors.forename: Yin
authors.initials: Y
authors.lastname: Zhou
authors.affiliation: School of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China.
authors.forename: Rui
authors.initials: R
authors.lastname: Yan
mesh_terms: D000535:Aluminum / Q000032:analysis*; D002412:Cations / Q000032:analysis; D047309:Flavones / Q000737:chemistry*; D005453:Fluorescence; D005456:Fluorescent Dyes / Q000737:chemistry*; D013050:Spectrometry, Fluorescence / Q000379:methods; D013447:Sulfites / Q000032:analysis*
chemical_list: D002412:Cations; D047309:Flavones; D005456:Fluorescent Dyes; D013447:Sulfites; D000535:Aluminum; C042345:hydrogen sulfite; C043562:flavone
keywords: 3-Hydroxy-3′-formylflavone; 3-Hydroxyflavone; Aluminum ion; Bisulfite anion; Fluorescent probe; Relay recognition