Ranjkesh Amid, Parast Meisam Hagh, Strzeżysz Olga, Zakerhamidi Mohammad Sadegh, Yoon Tae-Hoon
Department of Electronics Engineering, Pusan National University Busan 46241 Korea
Research Institute for Applied Physics and Astronomy, University of Tabriz Tabriz Iran
RSC Adv. 2018 Jun 21;8(40):22835-22845. doi: 10.1039/c8ra03701a. eCollection 2018 Jun 19.
The practical application of liquid crystals (LCs) as anisotropic and ubiquitous solvents is undoubtedly lucrative. Therefore, defining solvent polarity parameters as demonstrating the effects of anisotropic LC media on the photo-physical behavior of solute molecules is increasingly sought to determine their suitability for specific areas. For this fundamental reason, a spectroscopic method was used Kamlet-Abboud-Taft (KAT) polarity functions to determine the solvatochromic polarity (SP) parameters for different LCs regarding high and low dielectric anisotropy (Δ) at different temperatures and LC phases, both isotropic and anisotropic. According to empirical solvent polarity parameters, our LCs were categorized as a dipolar hydrogen bonding donor solvent. Moreover, typical and overall matrix anisotropy polarity parameters as variations of the SP parameter values between the isotropic and anisotropic phases were sorted according to Δ magnitude. Finally, we introduced the linear solvation energy relationships of empirical solvent scales with the KAT parameters sets for the first time in nematic LCs with the well-established correlations.
将液晶（LCs）用作各向异性且普遍存在的溶剂的实际应用无疑是有利可图的。因此，越来越需要定义溶剂极性参数，以证明各向异性液晶介质对溶质分子光物理行为的影响，从而确定它们在特定领域的适用性。基于这一根本原因，采用了一种光谱方法——Kamlet-Abboud-Taft（KAT）极性函数，来确定不同液晶在不同温度和液晶相（各向同性和各向异性）下，关于高介电各向异性（Δ）和低介电各向异性的溶剂化显色极性（SP）参数。根据经验溶剂极性参数，我们的液晶被归类为偶极氢键供体溶剂。此外，典型和整体基质各向异性极性参数，即各向同性相和各向异性相之间SP参数值的变化，根据Δ大小进行了分类。最后，我们首次在向列型液晶中引入了经验溶剂标度与KAT参数集的线性溶剂化能关系，并建立了良好的相关性。
