{"title":"作为 UO22+ ⊂ α-CD 包合物的一部分，L/D-色氨酸向电子激发铀酰离子的光诱导电子转移过程中的手性判别","authors":"Regina R. Kayumova, Sergey L. Khursan","doi":"10.1016/j.jphotochem.2024.116109","DOIUrl":null,"url":null,"abstract":"<div><div>Spectral-luminescent research indicates the formation of inclusion complexes during the interaction of uranyl nitrate and α–cyclodextrin (α–CD) in aqueous solutions. The chiral α–CD matrix imparts optical activity to the electronically excited uranyl ion *UO<sub>2</sub><sup>2+</sup><sub>aq</sub> in the clathrate, which manifests itself in the chiral discrimination of the quenching of *UO<sub>2</sub><sup>2+</sup><sub>aq</sub> by tryptophan enantiomers. It was found that the Stern-Volmer constant for D–Trp is 1.8 ± 0.2 times higher than that for L–Trp. A mechanistic explanation for the observed effect is proposed by DFT calculations.</div></div>","PeriodicalId":16782,"journal":{"name":"Journal of Photochemistry and Photobiology A-chemistry","volume":"459 ","pages":"Article 116109"},"PeriodicalIF":4.1000,"publicationDate":"2024-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Chiral discrimination during photoinduced electron transfer from L/D-tryptophan to electron-excited uranyl ion as a part of UO22+ ⊂ α–CD inclusion complex\",\"authors\":\"Regina R. Kayumova, Sergey L. Khursan\",\"doi\":\"10.1016/j.jphotochem.2024.116109\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>Spectral-luminescent research indicates the formation of inclusion complexes during the interaction of uranyl nitrate and α–cyclodextrin (α–CD) in aqueous solutions. The chiral α–CD matrix imparts optical activity to the electronically excited uranyl ion *UO<sub>2</sub><sup>2+</sup><sub>aq</sub> in the clathrate, which manifests itself in the chiral discrimination of the quenching of *UO<sub>2</sub><sup>2+</sup><sub>aq</sub> by tryptophan enantiomers. It was found that the Stern-Volmer constant for D–Trp is 1.8 ± 0.2 times higher than that for L–Trp. A mechanistic explanation for the observed effect is proposed by DFT calculations.</div></div>\",\"PeriodicalId\":16782,\"journal\":{\"name\":\"Journal of Photochemistry and Photobiology A-chemistry\",\"volume\":\"459 \",\"pages\":\"Article 116109\"},\"PeriodicalIF\":4.1000,\"publicationDate\":\"2024-10-24\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Photochemistry and Photobiology A-chemistry\",\"FirstCategoryId\":\"92\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S1010603024006531\",\"RegionNum\":3,\"RegionCategory\":\"化学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"CHEMISTRY, PHYSICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Photochemistry and Photobiology A-chemistry","FirstCategoryId":"92","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S1010603024006531","RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
Chiral discrimination during photoinduced electron transfer from L/D-tryptophan to electron-excited uranyl ion as a part of UO22+ ⊂ α–CD inclusion complex
Spectral-luminescent research indicates the formation of inclusion complexes during the interaction of uranyl nitrate and α–cyclodextrin (α–CD) in aqueous solutions. The chiral α–CD matrix imparts optical activity to the electronically excited uranyl ion *UO22+aq in the clathrate, which manifests itself in the chiral discrimination of the quenching of *UO22+aq by tryptophan enantiomers. It was found that the Stern-Volmer constant for D–Trp is 1.8 ± 0.2 times higher than that for L–Trp. A mechanistic explanation for the observed effect is proposed by DFT calculations.
期刊介绍：
JPPA publishes the results of fundamental studies on all aspects of chemical phenomena induced by interactions between light and molecules/matter of all kinds.
All systems capable of being described at the molecular or integrated multimolecular level are appropriate for the journal. This includes all molecular chemical species as well as biomolecular, supramolecular, polymer and other macromolecular systems, as well as solid state photochemistry. In addition, the journal publishes studies of semiconductor and other photoactive organic and inorganic materials, photocatalysis (organic, inorganic, supramolecular and superconductor).
The scope includes condensed and gas phase photochemistry, as well as synchrotron radiation chemistry. A broad range of processes and techniques in photochemistry are covered such as light induced energy, electron and proton transfer; nonlinear photochemical behavior; mechanistic investigation of photochemical reactions and identification of the products of photochemical reactions; quantum yield determinations and measurements of rate constants for primary and secondary photochemical processes; steady-state and time-resolved emission, ultrafast spectroscopic methods, single molecule spectroscopy, time resolved X-ray diffraction, luminescence microscopy, and scattering spectroscopy applied to photochemistry. Papers in emerging and applied areas such as luminescent sensors, electroluminescence, solar energy conversion, atmospheric photochemistry, environmental remediation, and related photocatalytic chemistry are also welcome.
京公网安备 11010802042870号
京ICP备2023020795号-1
分享
求助内容：
应助结果提醒方式：
扫码关注我们
