title: A Highly Selective and Sensitive Turn-On Fluorescent Chemosensor Based on Rhodamine 6G for Iron(III).
abstract: Recently, more and more rhodamine derivatives have been used as fluorophores to construct sensors due to their excellent spectroscopic properties. A rhodamine-based fluorescent and colorimetric Fe(3+) chemosensor 3',6'-bis(ethylamino)-2-acetoxyl-2',7'-dimethyl-spiro[1H-isoindole-1,9'-[9H]xanthen]-3(2H)-one (RAE) was designed and synthesized. Upon the addition of Fe(3+), the dramatic enhancement of both fluorescence and absorbance intensity, as well as the color change of the solution, could be observed. The detection limit of RAE for Fe(3+) was around 7.98 ppb. Common coexistent metal ions showed little or no interference in the detection of Fe(3+). Moreover, the addition of CN(-) could quench the fluorescence of the acetonitrile solution of RAE and Fe(3+), indicating the regeneration of the chemosensor RAE. The robust nature of the sensor was shown by the detection of Fe(3+) even after repeated rounds of quenching. As iron is a ubiquitous metal in cells and plays vital roles in many biological processes, this chemosensor could be developed to have applications in biological studies.
authors.affiliation: College of Chemistry & Molecular Engineering, Qingdao University of Science & Technology Qingdao 266042 (P. R. China) E-mail: huzhiqiang@qust.edu.cn jiangyi@iccas.ac.cn.
authors.forename: Zhi-Qiang
authors.initials: ZQ
authors.lastname: Hu
authors.affiliation: College of Chemistry & Molecular Engineering, Qingdao University of Science & Technology Qingdao 266042 (P. R. China) E-mail: huzhiqiang@qust.edu.cn jiangyi@iccas.ac.cn.
authors.forename: Ying-Ying
authors.initials: YY
authors.lastname: Gu
authors.affiliation: College of Chemistry & Molecular Engineering, Qingdao University of Science & Technology Qingdao 266042 (P. R. China) E-mail: huzhiqiang@qust.edu.cn jiangyi@iccas.ac.cn.
authors.forename: Wen-Zhou
authors.initials: WZ
authors.lastname: Hu
authors.affiliation: College of Chemistry & Molecular Engineering, Qingdao University of Science & Technology Qingdao 266042 (P. R. China) E-mail: huzhiqiang@qust.edu.cn jiangyi@iccas.ac.cn.
authors.forename: Lei-Li
authors.initials: LL
authors.lastname: Sun
authors.affiliation: College of Chemistry & Molecular Engineering, Qingdao University of Science & Technology Qingdao 266042 (P. R. China) E-mail: huzhiqiang@qust.edu.cn jiangyi@iccas.ac.cn.
authors.forename: Jiang-Hua
authors.initials: JH
authors.lastname: Zhu
authors.affiliation: College of Chemistry & Molecular Engineering, Qingdao University of Science & Technology Qingdao 266042 (P. R. China) E-mail: huzhiqiang@qust.edu.cn jiangyi@iccas.ac.cn.
authors.forename: Yi
authors.initials: Y
authors.lastname: Jiang
keywords: chemosensors; fluorescence; iron(III); rhodamine; selective response