We report a comprehensive result of investigations on three phosphonium based room temperature ionic liquids (ILs) of same cation, trihexyltetradecylphosphonium ([PC₆C₆C₆C₁₄]), with different anions viz. chloride [Cl]⁻, dicyanamide [-N(CN)₂]⁻ and bis(trifluoromethylsulfonyl) imide [-NTf₂]⁻ for catching the effect of size, symmetry, dipole moment, as well as electro-negativity of anions on glassy dynamics and charge transport of the formed ILs. The effort was made for tuning the property for getting superior conductivity, improved thermal stability, better electrode-electrolyte interaction to enable it for diverse biological and technological applications. The ILs were characterized with differential scanning calorimetry (DSC), thermogravimetry (TGA), broadband dielectric spectroscopy (BDS) along with other routine measurements like FT-IR, FT-Raman spectroscopies and computational investigations with density functional theory (DFT). The applications were evaluated by means of electrochemical and biological activities. From DSC and TGA measurements, the samples showed good thermal stability up to 573 K to project them as excellent electrolyte and better heat transfer fluid for high temperature needs in various technological fronts. Dielectric response revealed that the conductivity relaxation manifested above glass transition temperature (Tg) to be well represented by Dyre's random barrier model and it followed a Vogel–Fulcher–Tamman (VFT) behaviour against temperature. The sub-Tg relaxation reflected a Cole-Cole response with an Arrhenius T-dependence. The dielectric data revealed a slight correlation with Tg while anticorrelates with the fragility and low temperature activation energy (E_β). The DFT calculations gave the structure and other parameters in good agreement with the experimental data. The three ILs fulfilled most of the requirements needed for pharmaceuticals on evaluating pharmacokinetics, bioavailability and toxicity via in silico analysis. On exploring the preliminary biological studies, these ILs showed very good anti-bacterial, anti-oxidant and good anti-cancer activities highlighting their relevance and significance for pharmaceutical applications.

我们报告了对同一阳离子三己基_十四烷基phosph（[PC ₆ C ₆ C ₆ C ₁₄ ]）的三种基于based的室温离子液体（IL）进行研究的综合结果，即不同的阴离子。氯化物[ Cl] ^-，双氰胺[-N（CN）₂ ] ^-和双（三氟甲基磺酰基）酰亚胺[-NTf ₂ ] ^-用于捕捉阴离子的大小，对称性，偶极矩以及负电性对玻璃态动力学和形成的IL的电荷传输的影响。努力调整性能以获得优异的电导率，改善的热稳定性，更好的电极与电解质的相互作用，使其能够用于多种生物学和技术应用。IL的特征在于差示扫描量热法（DSC），热重法（TGA），宽带介电谱（BDS）以及其他常规测量，如FT-IR，FT-Raman光谱学和密度泛函理论（DFT）的计算研究。通过电化学和生物活性评估了这些应用。根据DSC和TGA测量，这些样品在高达573 K的温度下显示出良好的热稳定性，可作为各种技术领域的高温需求将它们投射为出色的电解质和更好的传热流体。介电响应表明，电导率弛豫在玻璃化转变温度（Tg）以上表现出来，可以用Dyre的随机势垒模型很好地表示出来，并且它遵循Vogel–Fulcher–Tamman（VFT）对温度的行为。亚Tg弛豫反映了Arrhenius T依赖性的Cole-Cole反应。介电数据显示与Tg轻微相关，而与脆性和低温活化能抗相关（介电响应表明，电导率弛豫在玻璃化转变温度（Tg）以上表现出来，可以用Dyre的随机势垒模型很好地表示出来，并且它遵循Vogel–Fulcher–Tamman（VFT）对温度的行为。亚Tg弛豫反映了Arrhenius T依赖性的Cole-Cole反应。介电数据显示与Tg轻微相关，而与脆性和低温活化能抗相关（介电响应表明，电导率弛豫在玻璃化转变温度（Tg）以上表现出来，可以用Dyre的随机势垒模型很好地表示出来，并且它遵循Vogel–Fulcher–Tamman（VFT）对温度的行为。亚Tg弛豫反映了Arrhenius T依赖性的Cole-Cole反应。介电数据显示与Tg轻微相关，而与脆性和低温活化能抗相关（Ë _β）。DFT计算得出的结构和其他参数与实验数据非常吻合。这三种IL满足了通过计算机模拟分析评估药代动力学，生物利用度和毒性所需的大多数药物要求。在探索初步生物学研究时，这些IL表现出非常好的抗菌，抗氧化和良好的抗癌活性，突显了它们在药物应用中的相关性和重要性。