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Conductive Zn(II)-metallohydrogels: the role of alkali metal cation size in gelation, rheology and conductance
Molecular Systems Design & Engineering ( IF 3.2 ) Pub Date : 2021-06-18 , DOI: 10.1039/d1me00042j Chinthakuntla Mahendar 1, 2, 3, 4, 5 , Yeeshu Kumar 1, 2, 3, 4, 5 , Manish Kumar Dixit 1, 2, 3, 4, 5 , Moupia Mukherjee 1, 2, 3, 4, 5 , Abul Kalam 6, 7, 8, 9, 10 , Mrigendra Dubey 1, 2, 3, 4, 5
Molecular Systems Design & Engineering ( IF 3.2 ) Pub Date : 2021-06-18 , DOI: 10.1039/d1me00042j Chinthakuntla Mahendar 1, 2, 3, 4, 5 , Yeeshu Kumar 1, 2, 3, 4, 5 , Manish Kumar Dixit 1, 2, 3, 4, 5 , Moupia Mukherjee 1, 2, 3, 4, 5 , Abul Kalam 6, 7, 8, 9, 10 , Mrigendra Dubey 1, 2, 3, 4, 5
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In the present report, a series of conductive metallohydrogels MH-Li, MH-Na, MH-K and MH-Cs (0.6% w/v) have been synthesized by deprotonation of a terephthalohydrazide derived ligand o-H4TEP using alkali bases MOH (M = Li+/Na+/K+/Cs+), followed by reaction with Zn(NO3)2·6H2O. The as-synthesized metallohydrogels have been thoroughly characterized via FT-IR spectroscopy, 1H NMR, UV-vis, fluorescence, ESI-mass spectrometry, FE-SEM, TEM, PXRD, TGA and rheological experiments to investigate the effect of size of alkali metal ions as well as the underlying mechanism of the gelation of the metallohydrogel. Rheological and EIS measurements were performed to explore the effects of alkali metal ion size and establish the correlation between the gelation behaviour and conductance property of the as-synthesised metallogels. An increment in the conductivity value of metallogels from 1.55 × 10−2 S cm−1 for MH-Li to 4.9 × 10−2 S cm−1 for MH-Cs has been observed upon increasing the alkali metal ion size, which is in accordance with the decline in the rheological properties of the metallogels. Also, the conductivity of all the synthesised metallogels was found to increase with temperature.
中文翻译：
导电 Zn(II)-金属水凝胶：碱金属阳离子大小在凝胶化、流变学和电导中的作用
在本报告中，一系列导电金属水凝胶MH-Li、MH-Na、MH-K和MH-Cs（0.6% w/v）通过对苯二甲酰肼衍生配体o -H 4 TEP使用碱碱去质子化合成MOH (M = Li + /Na + /K + /Cs + )，然后与 Zn(NO 3 ) 2 ·6H 2 O 反应。合成的金属水凝胶已通过FT-IR 光谱进行了彻底的表征，1H NMR、UV-vis、荧光、ESI-质谱、FE-SEM、TEM、PXRD、TGA 和流变实验研究碱金属离子大小的影响以及金属水凝胶凝胶化的潜在机制。进行流变学和 EIS 测量以探索碱金属离子大小的影响，并建立所合成金属凝胶的凝胶化行为和电导特性之间的相关性。在metallogels的电导率值的增量从1.55×10 -2小号厘米-1为MH-栗〜4.9×10 -2小号厘米-1为MH-CS已经观察到增加碱金属离子尺寸，这与金属凝胶流变学性能的下降是一致的。此外，发现所有合成金属凝胶的电导率随温度增加。
更新日期：2021-07-02
中文翻译：
导电 Zn(II)-金属水凝胶：碱金属阳离子大小在凝胶化、流变学和电导中的作用
在本报告中，一系列导电金属水凝胶MH-Li、MH-Na、MH-K和MH-Cs（0.6% w/v）通过对苯二甲酰肼衍生配体o -H 4 TEP使用碱碱去质子化合成MOH (M = Li + /Na + /K + /Cs + )，然后与 Zn(NO 3 ) 2 ·6H 2 O 反应。合成的金属水凝胶已通过FT-IR 光谱进行了彻底的表征，1H NMR、UV-vis、荧光、ESI-质谱、FE-SEM、TEM、PXRD、TGA 和流变实验研究碱金属离子大小的影响以及金属水凝胶凝胶化的潜在机制。进行流变学和 EIS 测量以探索碱金属离子大小的影响，并建立所合成金属凝胶的凝胶化行为和电导特性之间的相关性。在metallogels的电导率值的增量从1.55×10 -2小号厘米-1为MH-栗〜4.9×10 -2小号厘米-1为MH-CS已经观察到增加碱金属离子尺寸，这与金属凝胶流变学性能的下降是一致的。此外，发现所有合成金属凝胶的电导率随温度增加。
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