Cationic conjugated polyelectrolyte-based fluorometric detection of copper(II) ions in aqueous solution

Cationic conjugated polyelectrolyte-based fluorometric detection of copper(II) ions in aqueous solution
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基于阳离子共轭聚电解质的水溶液中铜(II)离子的荧光检测

DOI:
10.1016/j.polymer.2008.04.029
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发表时间:
2008-05
期刊:
影响因子:
4.6
通讯作者:
王树
王树
中科院分区:
化学2区
文献类型:
--
作者:
王树

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设计并合成了一系列主链含2,2 ′-联吡啶结构的水溶性阳离子聚芴共聚物(PFP-P1-3),作为Cu 2+离子的荧光探针。在无Cu ~(2+)存在下,PFP-P2在水溶液中具有较强的荧光发射。当加入Cu 2+离子时,PFP-P2通过弱的N-Cu相互作用与Cu 2+离子配位,其荧光被Cu 2+离子有效地猝灭,其Stern-Volmer常数(Ksv)为1.44× 107 M −1。该方法灵敏度高,检测限为20 nM。其它重金属离子的干扰较小,表明PFP-P2可作为Cu ~(2+)离子的探针,具有良好的选择性。
A series of water-soluble cationic polyfluorene copolymer containing 2,2′-bipyridine moieties (PFP-P1–3) in the backbone were designed and synthesized as the fluorescent probes for Cu2+ions. In the absence of the Cu2+ion, the PFP-P2exhibits strong fluorescence emission in aqueous solution. Upon adding the Cu2+ion, the PFP-P2coordinates to Cu2+ions through weak N⋯Cu interactions, and its fluorescence is efficiently quenched by the Cu2+ion with a Stern–Volmer constant (Ksv) of 1.44×107M−1. The new method has high sensitivity with a detection limit of 20nM. The minor interference from other heavy metal ions clearly shows that the PFP-P2can be used as the Cu2+ion probe with good selectivity.
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