A terpyridine-appended hexaarylbenzene fluorophore: synthesis, photophysical properties and application for the colorimetric detection of Fe2+ in aqueous solution

作者：Tian, Xiaochang; Li, Jianye; Gu, Cancan; Yin, Guohui^*; Zhang, Yuecheng; Zhao, Jiquan^*; Cao, Xiaohui^*

来源：New Journal of Chemistry, 2023, 47(9): 4245-4251.

DOI：10.1039/d2nj05821a

• IRON
• FLUORESCENCE
• CHEMOSENSOR
• DERIVATIVES
• PROBE
• IONS
• DYES
• PI

The hexaarylbenzene (HAB)-based push-pull fluorophore HAB-MeO-TPy with the 2,2 & PRIME;:6 & PRIME;,2 & DPRIME;-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 Fe2+, 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 Fe2+ detection. From absorption titration experiments, the detection limit was determined to be 1.50 x 10(-7) M. In addition, HAB-MeO-TPy was successfully applied to detect Fe2+ in real water samples.

• 单位
  广东药学院