Study on the recognition of psoralen and psoralen@cucurbit[8]uril fluorescent probe for Fe3+ ions

IF 1.7 4区化学 Q3 CHEMISTRY, MULTIDISCIPLINARY Journal of Inclusion Phenomena and Macrocyclic Chemistry Pub Date : 2022-10-19 DOI:10.1007/s10847-022-01169-8

Xuanxun Wang, Guangyan Luo, Lin Zhang, Jun Zheng, Xiaoyue Li, Zhu Tao, Qianjun Zhang

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Abstract

The interaction between psoralen (PSA) and cucurbit[8]uril (Q[8]) was studied by UV spectroscopy, fluorescence spectroscopy, infrared spectroscopy, ¹H NMR and X-ray crystal diffraction. The results showed that PSA and Q[8] can form a 2:1 host–guest inclusion complex with a binding constant of 1.83 × 10⁶ M⁻². PSA and PSA₂@Q[8] can be used as fluorescent probes to selectively recognize Fe³⁺. The recognition mechanism is due to the coordination effect of Fe³⁺, the electron transfer in PSA and PSA₂@Q[8] reduces fluorescence intensity and leads to fluorescence quenching. The fluorescence intensity of PSA and PSA₂@Q[8] showed a good linear correlation with the concentration of Fe³⁺ at 3.0 × 10^–5–2.4 × 10^–4 M and 6.0 × 10^–6–4.2 × 10^–5 M, and the limit of detection was 1.06 × 10^–7 M and 1.05 × 10^–8 M, respectively, which can quantitatively detect trace Fe³⁺ in aqueous solution.

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补骨脂素及psoralen@cucurbit[8]荧光探针对Fe3+离子的识别研究

采用紫外光谱、荧光光谱、红外光谱、1H NMR和x射线晶体衍射等方法研究了补骨脂素(PSA)与葫芦[8]uril (Q[8])的相互作用。结果表明，PSA与Q[8]可形成2:1的主客体包合物，结合常数为1.83 × 106 M−2。PSA和PSA2@Q[8]可作为荧光探针选择性识别Fe3+。识别机制是由于Fe3+的配位效应、PSA中的电子转移和PSA2@Q[8]降低了荧光强度，导致荧光猝灭。PSA和PSA2@Q的荧光强度与Fe3+浓度在3.0 × 10-5 - 2.4 × 10-4 M和6.0 × 10-6-4.2 × 10-5 M处呈良好的线性相关关系[8]，检出限分别为1.06 × 10-7 M和1.05 × 10-8 M，可定量检测水溶液中痕量Fe3+。

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来源期刊

Journal of Inclusion Phenomena and Macrocyclic Chemistry Agricultural and Biological Sciences-Food Science

CiteScore

4.10

自引率

8.70%

发文量

期刊介绍： The Journal of Inclusion Phenomena and Macrocyclic Chemistry is the premier interdisciplinary publication reporting on original research into all aspects of host-guest systems. Examples of specific areas of interest are: the preparation and characterization of new hosts and new host-guest systems, especially those involving macrocyclic ligands; crystallographic, spectroscopic, thermodynamic and theoretical studies; applications in chromatography and inclusion polymerization; enzyme modelling; molecular recognition and catalysis by inclusion compounds; intercalates in biological and non-biological systems, cyclodextrin complexes and their applications in the agriculture, flavoring, food and pharmaceutical industries; synthesis, characterization and applications of zeolites. The journal publishes primarily reports of original research and preliminary communications, provided the latter represent a significant advance in the understanding of inclusion science. Critical reviews dealing with recent advances in the field are a periodic feature of the journal.