A reusable fluorescent sensor from electrosynthesized water-soluble oligo(1-pyrenesulfonic acid) for effective detection of Fe3+
A reusable fluorescent sensor from electrosynthesized water-soluble oligo(1-pyrenesulfonic acid) for effective detection of Fe3+
复制标题
由电合成水溶性低聚（1-芘磺酸）制成的可重复使用的荧光传感器，可有效检测 Fe3
DOI：
10.1039/c8nj05000g
复制
发表时间：
2018-12-21
影响因子：
3.3
通讯作者：
Xu，Jingkun
中科院分区：
文献类型：
--
作者：
Jian，Nannan;Lin，Kaiwen;Xu，Jingkun
水溶性共轭寡/聚合物荧光传感器由于其优异的荧光特性和分子线信号放大效应，已被用于多种金属离子的检测，其中一些已经在水环境和生物体系中得到了真实的应用。本文以三氟化硼乙醚（BFEE）为溶剂，通过一步电聚合法合成了水溶性的低聚1-芘磺酸。这种低聚物被证明是一个优秀的蓝光发射体，在去离子水中具有约0.68的高荧光量子产率。我们进一步发现，寡聚（1-芘磺酸）可以有效地检测水溶液中的Fe 3+，由于其低聚物链的聚集荧光猝灭。微敏分析结果表明，该寡聚体具有较好的选择性和较低的检测限（1.00 × 10−7 M），优于其单体1-芘磺酸。此外，低聚物的荧光淬灭可以通过引入具有突出可逆性的磷酸盐（其原始强度的97%）来恢复。结果表明，电合成的低聚1-芘磺酸可用于水溶液中Fe ~（3+）的测定。
Owing to their excellent fluorescence properties and molecular wire signal amplification effect, water-soluble conjugated oligo-/polymer-based fluorescent sensors have been used for the detection of various metal ions, some of which have already been used in real applications in aqueous environments and biological systems. Herein, we synthesize water-soluble oligo(1-pyrenesulfonic acid) by one-step electropolymerization in boron trifluoride diethyl etherate (BFEE). This oligomer is demonstrated to be an excellent blue light-emitter with a high fluorescence quantum yield of approximately 0.68 in deionized water. We further find that oligo(1-pyrenesulfonic acid) can be employed to effectively detect Fe3+ in aqueous solution due to the aggregation fluorescence quenching of its oligomer chains. Minute sensing analytical results indicate that the oligomer displays good selectivity and a low detection limit (1.00 × 10−7 M), which are better than those of its monomer 1-pyrenesulfonic acid. Moreover, the fluorescence quenching of the oligomer can be recovered by introducing phosphates with outstanding reversibility (97% of its original intensity). With these results, electrosynthesized oligo(1-pyrenesulfonic acid) will be a good candidate for the determination of Fe3+ in aqueous solution.