{"title":"水溶液中聚合金(I)与谷胱甘肽配合物的研究","authors":"I. V. Mironov, V. Yu. Kharlamova","doi":"10.1134/S0036023624601247","DOIUrl":null,"url":null,"abstract":"<p>The study addresses reactions involving gold(I) glutathione complexes in aqueous solutions at <i>T</i> = 25°C and <i>I</i> = 0.2 M (NaCl) in the pH range of 7.20–6.06 (<i>C</i><sub>Au</sub> = (5–10) × 10<sup>–4</sup> M). Using mass spectrometry, it was shown that at <i>C</i><sub>GS</sub> > <i>C</i><sub>Au</sub>, polymeric species <span>\\({\\text{A}}{{{\\text{u}}}_{{\\text{4}}}}({\\text{GS}})_{4}^{*}\\)</span> and <span>\\({\\text{A}}{{{\\text{u}}}_{n}}({\\text{GS}})_{{n + 1}}^{*}\\)</span>, where <i>n</i> ≤ 4, can exist, together with monomeric <span>\\({\\text{Au}}({\\text{GS}})_{2}^{*}\\)</span> (the symbol * means the sum of species with different degrees of protonation). According to UV spectroscopy data, in the range of 0.5 < <i>C</i><sub>GS</sub>/<i>C</i><sub>Au</sub> < 3, all spectra can be described, within the experimental error, as linear combinations of the spectra of four species, including <span>\\({\\text{Au}}({\\text{GS}})_{2}^{*}\\)</span>. The proportion of <span>\\({\\text{Au}}({\\text{GS}})_{2}^{*}\\)</span> decreases with decreasing pH. The equilibrium constant for 0.25 <span>\\({\\text{A}}{{{\\text{u}}}_{{\\text{4}}}}({\\text{GSH}})_{4}^{{4 - }}\\)</span> + <span>\\({\\text{GSH}}_{2}^{ - }\\)</span> = <span>\\({\\text{Au}}({\\text{GSH}})_{2}^{{3 - }}\\)</span> + H<sup>+</sup> amounts to log <i>K</i> = –4.4 ± 0.1 (<i>I</i> = 0.2 M, NaCl).</p>","PeriodicalId":762,"journal":{"name":"Russian Journal of Inorganic Chemistry","volume":"69 10","pages":"1567 - 1574"},"PeriodicalIF":1.8000,"publicationDate":"2024-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"On Polymeric Gold(I) Complexes with Glutathione in Aqueous Solutions\",\"authors\":\"I. V. Mironov, V. Yu. Kharlamova\",\"doi\":\"10.1134/S0036023624601247\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p>The study addresses reactions involving gold(I) glutathione complexes in aqueous solutions at <i>T</i> = 25°C and <i>I</i> = 0.2 M (NaCl) in the pH range of 7.20–6.06 (<i>C</i><sub>Au</sub> = (5–10) × 10<sup>–4</sup> M). Using mass spectrometry, it was shown that at <i>C</i><sub>GS</sub> > <i>C</i><sub>Au</sub>, polymeric species <span>\\\\({\\\\text{A}}{{{\\\\text{u}}}_{{\\\\text{4}}}}({\\\\text{GS}})_{4}^{*}\\\\)</span> and <span>\\\\({\\\\text{A}}{{{\\\\text{u}}}_{n}}({\\\\text{GS}})_{{n + 1}}^{*}\\\\)</span>, where <i>n</i> ≤ 4, can exist, together with monomeric <span>\\\\({\\\\text{Au}}({\\\\text{GS}})_{2}^{*}\\\\)</span> (the symbol * means the sum of species with different degrees of protonation). According to UV spectroscopy data, in the range of 0.5 < <i>C</i><sub>GS</sub>/<i>C</i><sub>Au</sub> < 3, all spectra can be described, within the experimental error, as linear combinations of the spectra of four species, including <span>\\\\({\\\\text{Au}}({\\\\text{GS}})_{2}^{*}\\\\)</span>. The proportion of <span>\\\\({\\\\text{Au}}({\\\\text{GS}})_{2}^{*}\\\\)</span> decreases with decreasing pH. The equilibrium constant for 0.25 <span>\\\\({\\\\text{A}}{{{\\\\text{u}}}_{{\\\\text{4}}}}({\\\\text{GSH}})_{4}^{{4 - }}\\\\)</span> + <span>\\\\({\\\\text{GSH}}_{2}^{ - }\\\\)</span> = <span>\\\\({\\\\text{Au}}({\\\\text{GSH}})_{2}^{{3 - }}\\\\)</span> + H<sup>+</sup> amounts to log <i>K</i> = –4.4 ± 0.1 (<i>I</i> = 0.2 M, NaCl).</p>\",\"PeriodicalId\":762,\"journal\":{\"name\":\"Russian Journal of Inorganic Chemistry\",\"volume\":\"69 10\",\"pages\":\"1567 - 1574\"},\"PeriodicalIF\":1.8000,\"publicationDate\":\"2024-10-29\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Russian Journal of Inorganic Chemistry\",\"FirstCategoryId\":\"92\",\"ListUrlMain\":\"https://link.springer.com/article/10.1134/S0036023624601247\",\"RegionNum\":3,\"RegionCategory\":\"化学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"CHEMISTRY, INORGANIC & NUCLEAR\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Russian Journal of Inorganic Chemistry","FirstCategoryId":"92","ListUrlMain":"https://link.springer.com/article/10.1134/S0036023624601247","RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"CHEMISTRY, INORGANIC & NUCLEAR","Score":null,"Total":0}
引用次数: 0
摘要
研究了金(I)谷胱甘肽配合物在pH为7.20 ~ 6.06 (CAu = (5-10) × 10-4 M, T = 25°C, I = 0.2 M (NaCl)水溶液中的反应。在n≤4的条件下,CAu、聚合物种\({\text{A}}{{{\text{u}}}_{{\text{4}}}}({\text{GS}})_{4}^{*}\)和\({\text{A}}{{{\text{u}}}_{n}}({\text{GS}})_{{n + 1}}^{*}\)可以与单体\({\text{Au}}({\text{GS}})_{2}^{*}\)(符号*表示质子化程度不同的种的和)同时存在。根据紫外光谱数据,在0.5 &lt范围内;CGS/CAu &lt;3、在实验误差范围内,所有光谱都可以描述为四种光谱的线性组合,包括\({\text{Au}}({\text{GS}})_{2}^{*}\)。随着ph的降低,\({\text{Au}}({\text{GS}})_{2}^{*}\)的比例降低。0.25 \({\text{A}}{{{\text{u}}}_{{\text{4}}}}({\text{GSH}})_{4}^{{4 - }}\) + \({\text{GSH}}_{2}^{ - }\) = \({\text{Au}}({\text{GSH}})_{2}^{{3 - }}\) + H+的平衡常数为log K = -4.4±0.1 (I = 0.2 M, NaCl)。
On Polymeric Gold(I) Complexes with Glutathione in Aqueous Solutions
The study addresses reactions involving gold(I) glutathione complexes in aqueous solutions at T = 25°C and I = 0.2 M (NaCl) in the pH range of 7.20–6.06 (CAu = (5–10) × 10–4 M). Using mass spectrometry, it was shown that at CGS > CAu, polymeric species \({\text{A}}{{{\text{u}}}_{{\text{4}}}}({\text{GS}})_{4}^{*}\) and \({\text{A}}{{{\text{u}}}_{n}}({\text{GS}})_{{n + 1}}^{*}\), where n ≤ 4, can exist, together with monomeric \({\text{Au}}({\text{GS}})_{2}^{*}\) (the symbol * means the sum of species with different degrees of protonation). According to UV spectroscopy data, in the range of 0.5 < CGS/CAu < 3, all spectra can be described, within the experimental error, as linear combinations of the spectra of four species, including \({\text{Au}}({\text{GS}})_{2}^{*}\). The proportion of \({\text{Au}}({\text{GS}})_{2}^{*}\) decreases with decreasing pH. The equilibrium constant for 0.25 \({\text{A}}{{{\text{u}}}_{{\text{4}}}}({\text{GSH}})_{4}^{{4 - }}\) + \({\text{GSH}}_{2}^{ - }\) = \({\text{Au}}({\text{GSH}})_{2}^{{3 - }}\) + H+ amounts to log K = –4.4 ± 0.1 (I = 0.2 M, NaCl).
期刊介绍:
Russian Journal of Inorganic Chemistry is a monthly periodical that covers the following topics of research: the synthesis and properties of inorganic compounds, coordination compounds, physicochemical analysis of inorganic systems, theoretical inorganic chemistry, physical methods of investigation, chemistry of solutions, inorganic materials, and nanomaterials.