水-乙二醇二元介质中三(2,2'-联吡啶)钌(II)复合物双分子光化学淬灭的动力学研究。

IF 1.8 4区化学 Q3 CHEMISTRY, ANALYTICAL Analytical Sciences Pub Date : 2024-10-17 DOI:10.1007/s44211-024-00680-x

Yuki Hamano, Takuhiro Otsuka, Takeshi Higashiguchi, Nobuo Uehara, Arinori Inagawa

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引用次数: 0

摘要

根据我们研究小组之前的报告，我们采用分光光度法研究了三(2,2'-联吡啶基)钌(II)配合物在水-乙二醇二元介质中被铁氰化钾离子双分子光化学淬灭的过程。时间分辨光谱法显示，动态光化学淬灭是通过以扩散为主的途径进行的。当乙二醇的浓度大于 40 wt% 时，静态淬火过程会显著发生。对斯特恩-伏尔默图的分析表明，与我们之前在水-甘油二元溶剂系统中的结果相比，在水-乙二醇中发射体和淬灭体有呈现离子关联的趋势。这归因于疏水性，这与前人的研究结果一致，即在纯水中加入乙二醇会形成疏水区域，导致络合离子脱水。

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Kinetic study on bimolecular photochemical quenching of tris(2,2'-bipyridyl)ruthenium(II) complex in water-ethylene glycol binary media.

The bimolecular photochemical quenching of the tris(2,2'-bipyridyl)ruthenium (II) complex by ferricyanide ions in water-ethylene glycol binary media was investigated using a spectrophotometric approach, as previously reported by our research group. Time-resolved spectroscopy revealed that dynamic photochemical quenching occurred via a diffusion-dominated pathway. The static quenching process was found to occur significantly when the concentration of ethylene glycol was greater than 40 wt%. The analysis of the Stern-Volmer plots revealed that the emitters and quenchers tended to show ionic associations in water-ethylene glycol compared to our previous results with a water-glycerol binary solvent system. This is attributed to hydrophobicity, which is consistent with pioneering works that report that the addition of ethylene glycol to pure water forms hydrophobic regions, leading to dehydration of the complex ions.

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来源期刊

Analytical Sciences 化学-分析化学

CiteScore

2.90

自引率

18.80%

发文量

232

审稿时长

1 months

期刊介绍： Analytical Sciences is an international journal published monthly by The Japan Society for Analytical Chemistry. The journal publishes papers on all aspects of the theory and practice of analytical sciences, including fundamental and applied, inorganic and organic, wet chemical and instrumental methods. This publication is supported in part by the Grant-in-Aid for Publication of Scientific Research Result of the Japanese Ministry of Education, Culture, Sports, Science and Technology.