A Dawson-type {P4W24} modified using phenylphosphonic acid with excellent proton conductivity†

IF 4.3 3区材料科学 Q1 ENGINEERING, ELECTRICAL & ELECTRONIC ACS Applied Electronic Materials Pub Date : 2024-09-11 DOI:10.1039/D4DT01775G

Jiayu Liu, Wenjing Lei, Shihao Zhang, Huafeng Li, Siyu Liu, Pengtao Ma, Jingping Wang and Jingyang Niu

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Abstract

A case of organic–inorganic hybridized phosphotungstate modified using aromatic organophosphonic acid, K₄Na₄H₁₁[KCo₂(H₂O)₁₀P₄W₂₄O₉₂{(PhPO)₂}]·48H₂O (1), was successfully synthesized in conventional aqueous solution. The prominent structural feature is that the total structure of [KP₄W₂₄O₉₂{(PhPO)₂}]²³⁻ resembles a V-shaped structure, which was stabilized by two [Co(H₂O)₅]²⁺ ions. Furthermore, it can be connected into a three-dimensional mesh structure using K⁺ ions. Surprisingly, 1 possesses a remarkably high proton conductivity of 1.59 × 10⁻² S cm⁻¹ at 95% RH and 318 K probably due to the fact that its structure contains large amounts of lattice water molecules, coordination water molecules and counter cations.

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一种经苯基膦酸修饰的 Dawson- 型 {P4W24} 具有优异的质子传导性†。

在常规水溶液中成功合成了一例芳香族有机膦酸修饰的有机-无机杂化磷钨酸盐--K4Na4H11[KCo2(H2O)10P4W24O92{(PhPO)2]-48H2O (1)。其突出的结构特征是[KP4W24O92{(PhPO)2]]23-的整体结构类似于一个 V 型结构，由两个[Co(H2O)5]2+ 离子稳定。此外，它还可以通过 K+ 离子连接成三维网状结构。令人惊讶的是，1 在 95% RH、318 K 条件下具有 1.59 × 10-2 S cm-1 的惊人高质子电导率，这可能是由于其结构中含有大量的晶格水、配位水和反阳离子。

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