Improvement in the assessment of direct and facilitated ion transfers by electrochemically induced redox transformations of common molecular probes
文献类型：期刊论文
| 作者 | Zhou M ; Gan SY ; Zhong LJ ; Dong XD ; Ulstrup J ; Han DX ; Niu L |
| 刊名 | physical chemistry chemical physics
 |
| 出版日期 | 2012 |
| 卷号 | 14期号:10页码:3659-3668 |
| 关键词 | ALKALI-METAL CATIONS WATER/1 LIQUID INTERFACE 2-DICHLOROETHANE INTERFACE PARTITION DIAGRAMS 3-PHASE ELECTRODE GIBBS ENERGIES WATER VOLTAMMETRY MEMBRANE LIPOPHILICITY |
| ISSN号 | 1463-9076 |
| 通讯作者 | han dx |
| 中文摘要 | a new strategy based on a thick organic film modified electrode allowed us, for the first time, to explore the voltammetric processes for a series of hydrophilic ions by electrochemically induced redox transformations of common molecular probes. during the limited time available for voltammetry, this thick organic film ensured that the generated product of the molecular probe, which is within a limited diffusion layer, was kept far away from the aqueous-organic solvent interface; therefore, regardless of the degree of hydrophobicity, the generated product never participates in ion exchange across the interface and the charge neutrality of the organic film (containing an extremely hydrophobic electrolyte) can only be maintained by the injection of ions from the aqueous phase. taking advantage of this fact, common redox probes, such as ferrocene (fc) and 7,7,8,8-tetracyanoquinodimethane (tcnq), which are almost useless for both three-phase electrode (tpe) and thin-layer cyclic voltammetry (tlcv) methods, can induce the transfer of numerous highly hydrophilic anions and cations. consequently, the majority of their gibbs transfer energies have been accurately determined for the first time to the best of our knowledge. with this in mind, using tcnq as a redox probe to induce facilitated cation transfer, a stategy that is more advantageous than traditional methods has been developed. the main advantages are that: (i) voltammetric experiments performed on this system were free from the polarized potential window (ppw) in the aqueous phase and, as a result, this allowed the assessment of weakly assisted ion transfers, which appear at the terminal of the ppw at single polarized interfaces; (ii) without introducing the tetraphenylarsonium-tetraphenylborate (tpas-tpb) thermodynamic assumption, one can conveniently evaluate both the association constant and the stoichiometric parameter between the ion and its ionophore by comparison of their direct and facilitated ion transfer voltammograms. these encouraging results illustrated the exciting innovation for assessing direct and facilitated ion transfers based on this new thick organic film modified electrode. |
| 收录类别 | SCI收录期刊论文 |
| 语种 | 英语 |
| WOS记录号 | WOS:000300314100047 |
| 公开日期 | 2013-08-29 |
| 源URL | [http://ir.ciac.jl.cn/handle/322003/48700]  |
| 专题 | 长春应用化学研究所_长春应用化学研究所知识产出_期刊论文 |
| 推荐引用方式 GB/T 7714 | Zhou M,Gan SY,Zhong LJ,et al. Improvement in the assessment of direct and facilitated ion transfers by electrochemically induced redox transformations of common molecular probes[J]. physical chemistry chemical physics,2012,14(10):3659-3668. |
| APA | Zhou M.,Gan SY.,Zhong LJ.,Dong XD.,Ulstrup J.,...&Niu L.(2012).Improvement in the assessment of direct and facilitated ion transfers by electrochemically induced redox transformations of common molecular probes.physical chemistry chemical physics,14(10),3659-3668. |
| MLA | Zhou M,et al."Improvement in the assessment of direct and facilitated ion transfers by electrochemically induced redox transformations of common molecular probes".physical chemistry chemical physics 14.10(2012):3659-3668. |
入库方式： OAI收割
来源：长春应用化学研究所
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