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An Li+-enriched Co2+-induced metallogel: a study on thixotropic rheological behaviour and conductance
Soft Matter ( IF 2.9 ) Pub Date : 2020-03-20 , DOI: 10.1039/c9sm02544h Chinthakuntla Mahendar 1, 2, 3, 4, 5 , Yeeshu Kumar 1, 2, 3, 4, 5 , Manish Kumar Dixit 1, 2, 3, 4, 5 , Mrigendra Dubey 1, 2, 3, 4, 5
Soft Matter ( IF 2.9 ) Pub Date : 2020-03-20 , DOI: 10.1039/c9sm02544h Chinthakuntla Mahendar 1, 2, 3, 4, 5 , Yeeshu Kumar 1, 2, 3, 4, 5 , Manish Kumar Dixit 1, 2, 3, 4, 5 , Mrigendra Dubey 1, 2, 3, 4, 5
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An alkali base and counterion-selective red metallogel (1% w/v) has been synthesized by mixing the adipic acid-derived ligand H2AL with LiOH, followed by the addition of 1 equivalent of Co(OAc)2 in DMF. The addition of Co(OAc)2 not only resulted in the formation of a 2 : 2 (M : L) complex, but also led to the consecutive steps of aggregation, fiber creation, entrapment of the solvent and eventually gelation. The metallogel formation and the mechanism behind gelation have been well characterized and established using various instrumental techniques such as FTIR spectroscopy, UV-vis spectroscopy, FE-SEM, TEM, PXRD, ESI-mass spectrometry, Job's plot and rheology analysis. Nyquist plots suggested a large decrease in the resistance value from 11.3 kΩ to 4.2 kΩ for the solution obtained from the ligand deprotonated by LiOH (AL2−) and Co(OAc)2 containing the metallogel. The Nyquist plot and resistance of the metallogel have also been studied under the influence of temperature and ultrasound stimuli. The extensive rheological measurements provide information about the strength of the gel network and the highly reversible nature and thixotropic behaviour of the metallogel.
中文翻译：
富Li +的Co2 +诱导的金属茂：触变流变行为和电导研究
通过将己二酸衍生的配体H 2 AL与LiOH混合，然后在DMF中添加1当量的Co（OAc）2，合成了碱金属和抗衡离子选择性的红色金属茂（1％w / v）。Co（OAc）2的添加不仅导致形成2：2（M：L）的络合物，而且还导致了聚集，纤维生成，溶剂截留并最终凝胶化的连续步骤。使用各种仪器技术，如FTIR光谱，UV-可见光谱，FE-SEM，TEM，PXRD，ESI-质谱，Job's图和流变分析，已经很好地表征并确定了金属胶的形成和凝胶化的机理。奈奎斯特图表明，对于由LiOH（AL 2-）和Co（OAc）2去质子化的配体获得的溶液，电阻值从11.3kΩ大大降低到4.2kΩ。包含metallogel。在温度和超声刺激的影响下，还研究了金属对苯二酚的奈奎斯特图和电阻。广泛的流变学测量提供了有关凝胶网络的强度以及金属凝胶的高度可逆性质和触变性的信息。
更新日期：2020-04-24
中文翻译：
富Li +的Co2 +诱导的金属茂：触变流变行为和电导研究
通过将己二酸衍生的配体H 2 AL与LiOH混合，然后在DMF中添加1当量的Co（OAc）2，合成了碱金属和抗衡离子选择性的红色金属茂（1％w / v）。Co（OAc）2的添加不仅导致形成2：2（M：L）的络合物，而且还导致了聚集，纤维生成，溶剂截留并最终凝胶化的连续步骤。使用各种仪器技术，如FTIR光谱，UV-可见光谱，FE-SEM，TEM，PXRD，ESI-质谱，Job's图和流变分析，已经很好地表征并确定了金属胶的形成和凝胶化的机理。奈奎斯特图表明，对于由LiOH（AL 2-）和Co（OAc）2去质子化的配体获得的溶液，电阻值从11.3kΩ大大降低到4.2kΩ。包含metallogel。在温度和超声刺激的影响下，还研究了金属对苯二酚的奈奎斯特图和电阻。广泛的流变学测量提供了有关凝胶网络的强度以及金属凝胶的高度可逆性质和触变性的信息。
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