Ameta Rakesh Kumar
SMMPISR, Kadi Sarva Vishwavidyalaya, Gandhinagar 382015, India.
ACS Omega. 2020 Dec 22;6(1):456-464. doi: 10.1021/acsomega.0c04896. eCollection 2021 Jan 12.
Herein, we report metal-organic ionic frameworks (MOIFs; an ionic product of an anionic complex and an organic cationic head group) for the adsorption of toxic organic pollutants and as a self-rotatory motor. MOIFs were synthesized via the ion-exchange mechanism in water (without use of any toxic organic solvent) using Na[Fe(CN)NO] and [C HN(CH)] and characterized through small-angle X-ray scattering (SAXS), X-ray diffraction (XRD), and Fourier transform infrared (FTIR) techniques. Thermal gravimetric (TGA/DTA) and differential scanning calorimetric (DSC) studies of MOIFs have informed their activation energy, enthalpies of crystallization/melting, and specific heat capacity (SHC), which have also been correlated with their structural properties. MOIFs have shown the adsorption of toxic pollutants determined through the UV-visible method, two parameter isotherms, thermal kinetics, and activation parameters. The interaction between the adsorbate and adsorbent has been estimated with the equilibrium isotherm, which is characteristic of the adsorption system. Apart from this, we also found MOIF, especially dodecyltrimethyl ammonium cation + nitroprusside anion (Dt-NP), to be an autonomous motor, where it could develop a surface tension gradient at the water interface, and this gradient produced mechanical motion, as demonstrated with boat experiments.
在此，我们报道了金属有机离子框架（MOIFs；一种由阴离子络合物和有机阳离子头基形成的离子产物）用于吸附有毒有机污染物以及作为一种自旋转马达。MOIFs是在水中通过离子交换机制（不使用任何有毒有机溶剂）使用Na[Fe(CN)NO]和[C₁₂H₂₅N(CH₃)₃]合成的，并通过小角X射线散射（SAXS）、X射线衍射（XRD）和傅里叶变换红外（FTIR）技术进行了表征。对MOIFs的热重（TGA/DTA）和差示扫描量热（DSC）研究揭示了它们的活化能、结晶/熔化焓和比热容（SHC），这些也与它们的结构性质相关。MOIFs通过紫外可见法、双参数等温线、热动力学和活化参数测定显示出对有毒污染物的吸附。吸附质与吸附剂之间的相互作用已通过平衡等温线进行了估算，这是吸附系统的特征。除此之外，我们还发现MOIF，特别是十二烷基三甲基铵阳离子+硝普钠阴离子（Dt-NP），是一种自主马达，它可以在水界面处形成表面张力梯度，并且这种梯度产生了机械运动，如船实验所示。
