Tetra-Pr3+-Incorporated Tellurotungstate Covalently Modified by d-methionine: Proton Conduction and Photochromic Properties

IF 4 2区化学 Q2 CHEMISTRY, PHYSICAL

Journal of Molecular Structure Pub Date : 2025-06-09 DOI:10.1016/j.molstruc.2025.142955

Ke Wang , Bingxue Niu , Chaoxia Sui , Pengtao Ma

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引用次数: 0

Abstract

A neoteric tetra-Ln³⁺-incorporated d-methionine covalently modified tellurotungstate NaH₁₅{[Te₄W₄₄O₁₅₁(OH)₂(H₂O)₄(D-met)₂][Pr₂(H₂O)₈(D-met)]₂}·54H₂O (D-met = d-methionine) (1) was fabricated by one-pot self-assembly method. The architecture of compound 1 can be described as four [TeW₉O₃₃]^8– fragments encapsulating a [W₈O₁₉(OH)₂Pr₄(H₂O)₂₀(D-met)₄]¹⁶⁺ cluster. It is worth mentioning that the organic ligand d-methionine was directly covalently modified on the POM framework, connecting the W atom center. The alternating current electrochemical impedance spectroscopy (AC-EIS) demonstrated that the conductivity of compound 1 reach to 1.38×10⁻² S·cm⁻¹ under optimal circumstances. Furthermore, compound 1 has also displayed quick-response photochromic property with tinting half-life periods t_1/2 of 0.735 min.

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d-蛋氨酸共价修饰的四聚碲酸盐：质子传导和光致变色性质

采用一锅自组装法制备了新型四ln3 +包合d-蛋氨酸共价修饰碲钨酸盐NaH15{[Te4W44O151(OH)2(H2O)4(D-met)2][Pr2(H2O)8(D-met)]2}·54H2O （D-met = d-蛋氨酸）(1)。化合物1的结构可以描述为四个[TeW9O33]8 -片段封装了一个[W8O19(OH)2Pr4(H2O)20(D-met)4]16+簇。值得一提的是，有机配体d-蛋氨酸被直接共价修饰在POM框架上，连接W原子中心。交流阻抗谱（AC-EIS）表明，在最佳条件下，化合物1的电导率可达1.38×10−2 S·cm−1。此外，化合物1还表现出快速响应的光致变色性质，着色半衰期t1/2为0.735 min。

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来源期刊

Journal of Molecular Structure 化学-物理化学

CiteScore

7.10

自引率

15.80%

发文量

2384

审稿时长

45 days

期刊介绍： The Journal of Molecular Structure is dedicated to the publication of full-length articles and review papers, providing important new structural information on all types of chemical species including: • Stable and unstable molecules in all types of environments (vapour, molecular beam, liquid, solution, liquid crystal, solid state, matrix-isolated, surface-absorbed etc.) • Chemical intermediates • Molecules in excited states • Biological molecules • Polymers. The methods used may include any combination of spectroscopic and non-spectroscopic techniques, for example: • Infrared spectroscopy (mid, far, near) • Raman spectroscopy and non-linear Raman methods (CARS, etc.) • Electronic absorption spectroscopy • Optical rotatory dispersion and circular dichroism • Fluorescence and phosphorescence techniques • Electron spectroscopies (PES, XPS), EXAFS, etc. • Microwave spectroscopy • Electron diffraction • NMR and ESR spectroscopies • Mössbauer spectroscopy • X-ray crystallography • Charge Density Analyses • Computational Studies (supplementing experimental methods) We encourage publications combining theoretical and experimental approaches. The structural insights gained by the studies should be correlated with the properties, activity and/ or reactivity of the molecule under investigation and the relevance of this molecule and its implications should be discussed.