Exploring Proton Conductivity Studies of a Copper-based Hydroxylated Polyoxometalate

IF 1.7 4区化学 Q3 CHEMISTRY, MULTIDISCIPLINARY

Journal of Chemical Sciences Pub Date : 2023-12-22 DOI:10.1007/s12039-023-02237-3

Athira Ravi, Ratri Biswas, Sarbani Das, Samar K. Das

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引用次数: 0

Abstract

A sole inorganic framework-material formulated as [Li(H₂O)₄][{Cu^I(H₂O)_1.5} {Cu^II(H₂O)₃}₂{W^VI₁₂O₃₆(OH)₆}]·N₂·H₂S·3H₂O (1), consisting of a hydroxylated polyoxometalate (POM) anion, [{W^VI₁₂O₃₆(OH)₆}]⁶⁻ and a mixed-valent Cu(II)- and Cu(I)-aqua cationic complex species, [{Cu^I(H₂O)_1.5}{Cu^II(H₂O)₃}₂]⁵⁺, has been utilized to explore its proton conductivity studies. The POM cluster anion is functionalized with six hydroxyl groups, meaning there are six W^VI-OH groups per cluster unit. Compound 1, insoluble in water, can be described as an inorganic acid because its water suspension shows an acidic pH. The presence of these six hydroxyl groups per cluster unit having six labile protons has encouraged us to perform proton conductivity studies of this system. The highest proton conductivity of compound 1 is 1.72 ×10⁻² S cm⁻¹ at a temperature of 80 °C at 98% relative humidity (RH). Arrhenius plot has been constructed from the temperature-dependent proton conductivity values. The concerned Arrhenius plot has shown good linearity throughout the temperature range of 40 to 80 °C, revealing an activation energy of 0.41 eV. The compound has also shown remarkable stability in the conductivity value for 40 h.

Graphical Abstract

The proton conductivity studies of a framework-material [Li(H₂O)₄][{Cu^I(H₂O)_1.5} {Cu^II(H₂O)₃}₂{W^VI₁₂O₃₆(OH)₆}]·N₂·H₂S·3H₂O (1) have been performed. Compound 1 exhibits proton conductivity value of 1.72 ×10⁻² S cm⁻¹ at a temperature of 80 °C at 98% relative humidity. The concerned Arrhenius plot gives the activation energy value of 0.41 eV.

Abstract Image

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探索铜基羟基化聚氧金属酸盐的质子传导性研究

一种由[Li(H2O)4][{CuI(H2O)1.5} {CuII(H2O)3}2{WVI12O36(OH)6}]-N2-H2S-3H2O (1)，由一个羟基化的聚氧化金属酸盐（POM）阴离子[{WVI12O36(OH)6}]6-和一个混合价的Cu(II)-和Cu(I)-阳离子络合物[{CuI(H2O)1.5}{CuII(H2O)3}2]5+ 的质子传导性研究。POM 簇阴离子被六个羟基官能化，即每个簇单元有六个 WVI-OH 基团。化合物 1 不溶于水，可以说是一种无机酸，因为其水悬浮液的 pH 值呈酸性。由于每个簇单元中存在六个羟基，而这六个羟基具有六个可变质子，这促使我们对该体系进行质子传导性研究。在温度为 80 °C 和相对湿度为 98% 的条件下，化合物 1 的最高质子电导率为 1.72 ×10-2 S cm-1。根据随温度变化的质子电导率值绘制了阿伦尼乌斯图。相关的阿伦尼乌斯图在 40 至 80 °C 的温度范围内显示出良好的线性，活化能为 0.41 eV。该化合物在 40 小时内的电导率值也表现出显著的稳定性。图解摘要对一种框架材料 [Li(H2O)4][{CuI(H2O)1.5} {CuII(H2O)3}2{WVI12O36(OH)6}]-N2-H2S-3H2O (1) 进行了质子电导率研究。在温度为 80 ℃、相对湿度为 98% 的条件下，化合物 1 的质子电导率值为 1.72 ×10-2 S cm-1。相关的阿伦尼乌斯图给出的活化能值为 0.41 eV。

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来源期刊

Journal of Chemical Sciences CHEMISTRY, MULTIDISCIPLINARY-

CiteScore

3.10

自引率

5.90%

发文量

107

审稿时长

1 months

期刊介绍： Journal of Chemical Sciences is a monthly journal published by the Indian Academy of Sciences. It formed part of the original Proceedings of the Indian Academy of Sciences – Part A, started by the Nobel Laureate Prof C V Raman in 1934, that was split in 1978 into three separate journals. It was renamed as Journal of Chemical Sciences in 2004. The journal publishes original research articles and rapid communications, covering all areas of chemical sciences. A significant feature of the journal is its special issues, brought out from time to time, devoted to conference symposia/proceedings in frontier areas of the subject, held not only in India but also in other countries.