Quantitative determination of cation-π interactions between metal ions and aromatic groups in aqueous media by a hydrogel Donnan potential method
Quantitative determination of cation-π interactions between metal ions and aromatic groups in aqueous media by a hydrogel Donnan potential method
复制标题
水凝胶唐南电位法定量测定水介质中金属离子与芳香族基团之间的阳离子-π相互作用
DOI：
10.1039/d1cp05622k
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发表时间：
2022
影响因子：
3.3
通讯作者：
Gong Jian Ping
中科院分区：
文献类型：
--
作者：
Fan Hailong;Guo Honglei;Kurokawa Takayuki;Gong Jian Ping
已知水介质中的阳离子-π相互作用在各种生物活性中起关键作用。然而，由于缺乏合适的测试系统和方法，很难获得定量的实验信息，例如金属离子与芳香基团的结合比。在此，我们提出了一种水凝胶Donnan势的方法来确定金属离子的结合比例的芳香族基团的聚合物网络在水介质中。在该方法中，我们采用了最近开发的聚（阳离子-π）水凝胶，其在聚合物网络上具有丰富的阳离子基团和芳族基团的相邻序列。采用微电极技术（MET）测定了聚阳离子-π水凝胶的唐南电位。从Donnan势出发，首次定量测定了各种金属离子与芳香基团的结合率。
Cation–π interactions in aqueous media are known to play critical roles in various biological activities. However, quantitative experimental information, such as the binding ratio of metal ions to aromatic groups, is hardly available due to the lack of a suitable test system and method. Herein, we proposed a hydrogel Donnan potential method to determine the binding ratio of metal ions to aromatic groups on polymer networks in aqueous media. In this method, we adopted recently developed poly(cation–π) hydrogels with a rich adjacent sequence of the cationic group and the aromatic group on the polymer network. A microelectrode technique (MET) is used to measure the Donnan potential of the poly(cation–π) hydrogels. From the Donnan potential, the binding ratios of various metal ions to aromatic groups are quantitatively determined for the first time.