title: Fluorescent oligomer as a chemosensor for the label-free detection of Fe(3+) and dopamine with selectivity and sensitivity.
abstract: In this article, a sensitive and selective turn-off fluorescence chemosensor, Tyloxapol (one kind of water soluble oligomer), was developed for the label-free detection of Fe(3+) ions in aqueous solution. Fluorescence (FL) experiments demonstrated that Tyloxapol was a sensitive and selective fluorescence sensor for the detection of Fe(3+) directly in water over a wide range of metal cations including Na(+), K(+), Ag(+), Hg(2+), Cd(2+), Co(2+), Cu(2+), Cr(3+), Mn(2+), Ba(2+), Zn(2+), Ni(2+), Mg(2+), Ca(2+), and Pb(2+). Moreover, the fluorescence intensity of Tyloxapol has shown a linear response to Fe(3+) in the concentration range of 0-100 μmol L(-1) with a detection limit of 2.2 μmol L(-1) in aqueous solution. Next, based on a competition mechanism, another turn-on sensing application of the Tyloxapol/Fe(3+) platform to probe dopamine (DA) against various other biological molecules such as other neurotransmitters or amino acids (norepinephrine bitartrate, acetylcholine chloride, alanine, valine, phenylalanine, tyrosine, leucine, glycine, histidine) were also investigated. It is expected that our strategy may offer a new approach for developing simple, cost-effective, rapid and sensitive sensors in biological and environmental applications.
authors.affiliation: National Engineering Technology Research Center for Colloidal Materials, Shandong University, Jinan, 250100, PR China.
authors.forename: Lingli
authors.initials: L
authors.lastname: Zhao
authors.affiliation: National Engineering Technology Research Center for Colloidal Materials, Shandong University, Jinan, 250100, PR China; Key Laboratory of Colloid and Interface Chemistry (Shandong University), Ministry of Education, Jinan, 250100, PR China. Electronic address: xinx@sdu.edu.cn.
authors.forename: Xia
authors.initials: X
authors.lastname: Xin
authors.affiliation: China Research Institute of Daily Chemical Industry, Taiyuan, Shanxi, 030001, PR China.
authors.forename: Peng
authors.initials: P
authors.lastname: Ding
authors.affiliation: Key Laboratory of Colloid and Interface Chemistry (Shandong University), Ministry of Education, Jinan, 250100, PR China.
authors.forename: Aixin
authors.initials: A
authors.lastname: Song
authors.affiliation: National Engineering Technology Research Center for Colloidal Materials, Shandong University, Jinan, 250100, PR China.
authors.forename: Zengchun
authors.initials: Z
authors.lastname: Xie
authors.affiliation: Key Laboratory of Colloid and Interface Chemistry (Shandong University), Ministry of Education, Jinan, 250100, PR China.
authors.forename: Jinglin
authors.initials: J
authors.lastname: Shen
authors.affiliation: National Engineering Technology Research Center for Colloidal Materials, Shandong University, Jinan, 250100, PR China; Key Laboratory of Colloid and Interface Chemistry (Shandong University), Ministry of Education, Jinan, 250100, PR China.
authors.forename: Guiying
authors.initials: G
authors.lastname: Xu
mesh_terms: D004298:Dopamine / Q000032:analysis*; D005290:Ferric Compounds / Q000032:analysis*; D005456:Fluorescent Dyes / Q000737:chemistry*; D057230:Limit of Detection; D046529:Microscopy, Electron, Transmission; D011108:Polymers / Q000737:chemistry*
chemical_list: D005290:Ferric Compounds; D005456:Fluorescent Dyes; D011108:Polymers; D004298:Dopamine
keywords: Dopamine; Fe(3+) ion; Fluorescence chemosensor; Selectivity; Sensitivity; Turn-off probe