Synthesis and photophysical behavior of a water-soluble fluorescein-bearing polymer for Fe3+ ion sensing

• Published in: Journal of polymer research 2008-12, Vol.15 (6), p.427-433
• Main Authors: Wang, Baoyan, Guan, Xiaoling, Hu, Yulin, Su, Zhixing
• Format: Article
• Language: English
• Subjects: Aqueous solutions; Behavior; Characterization and Evaluation of Materials; Chemistry; Chemistry and Materials Science; Industrial Chemistry/Chemical Engineering; Polymer Sciences
• ISSN: 1022-9760; 1572-8935
• DOI: 10.1007/s10965-008-9188-0

An acrylic monomer bearing xanthene group, acryloylfluorescein (Ac-Flu) was synthesized from fluorescein and acryloyl chloride in the presence of triethylamine in dry dichloromethane (CH 2 Cl 2 ) at room temperature. The synthesized Ac-Flu was identified by IR, MS and 1 HNMR spectra. Copolymer of Ac-Flu and acrylamide (AM) was synthesized with thermal initiator and it was characterized by the method of IR, UV–Vis and DSC. The photophysical behaviors of Ac-Flu and its copolymer were explored by recording the fluorescence spectra in solution, solid state and film in detail. In addition, the ability of the copolymer to detect different metal cations (Mn 2+ , Fe 3+ , Fe 2+ , Co 2+ , Ni 2+ , Cu 2+ , Zn 2+ ) in aqueous solution was investigated. The results showed that poly(Ac-Flu- co -AM) had a good linear response between the logarithm of concentration of Fe 3+ (lg[Fe 3+ ]) against the relative fluorescence intensity for Fe 3+ concentration. The results suggest that this copolymer may offer potential as a reusable polymer sensor for Fe 3+ ion in aqueous solution.