Chiral discrimination during photoinduced electron transfer from L/D-tryptophan to electron-excited uranyl ion as a part of UO22+ ⊂ α–CD inclusion complex

IF 4.1 3区化学 Q2 CHEMISTRY, PHYSICAL

Journal of Photochemistry and Photobiology A-chemistry Pub Date : 2024-10-24 DOI:10.1016/j.jphotochem.2024.116109

引用次数: 0

Abstract

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.

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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

光谱发光研究表明，硝酸铀酰和α-环糊精（α-CD）在水溶液中相互作用时会形成包合物。手性 α-CD 矩阵为凝块中电子激发的尿苷离子 *UO22+aq 带来了光学活性，这种活性表现在色氨酸对映体对 *UO22+aq 的淬灭的手性鉴别上。研究发现，D-Trp 的斯特恩-沃尔默常数是 L-Trp 的 1.8 ± 0.2 倍。通过 DFT 计算，提出了观察到的效应的机理解释。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Photochemistry and Photobiology A-chemistry 化学-物理化学

CiteScore

7.90

自引率

7.00%

发文量

580

审稿时长

48 days

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.