A terpyridine-appended hexaarylbenzene fluorophore: synthesis, photophysical properties and application for the colorimetric detection of Fe2+ in aqueous solution. (2nd February 2023)

• Record Type: Journal Article
• Authors: Tian, Xiaochang; Li, Jianye; Gu, Cancan; Yin, Guohui; Zhang, Yuecheng; Zhao, Jiquan; Cao, Xiaohui
• Is Part Of: New journal of chemistry. Volume 47:Number 9(2023)
• Page Start: 4245
• Page End: 4251
• Publication Date: 2023-02-02
• Subjects: Chemistry -- Periodicals; Chimie -- Périodiques; 540
• DOI: 10.1039/d2nj05821a
• Languages: English
• ISSNs: 1144-0546

Abstract

Abstract : A hexaarylbenzene-based push–pull fluorophore featuring unusual uphill emission was prepared, which can act as a colorimetric sensor for detecting Fe 2+ . Abstract : The hexaarylbenzene (HAB)-based push–pull fluorophore HAB-MeO-TPy with the 2, 2′:6′, 2″-terpyridine (TPy) unit as an acceptor and the methoxy (MeO) group as a donor was developed. It was observed that HAB-MeO-TPy exhibited an unusual uphill-type emission with increasing solvent polarity from cyclohexane to DMSO. By comparison with a previously reported fluorophore HPB-MeO-DCV, a structure–property relationship regarding this uncommon fluorescence behavior was disclosed. Furthermore, the sensing properties of HAB-MeO-TPy for metal ions were also investigated. In the presence of Fe 2+, HAB-MeO-TPy displayed a visual color change from colorless to magenta, indicating that HAB-MeO-TPy can act as a "naked eye" sensor for Fe 2+ detection. From absorption titration experiments, the detection limit was determined to be 1.50 × 10 −7 M. In addition, HAB-MeO-TPy was successfully applied to detect Fe 2+ in real water samples.