Bendaoud Umama, Bhowmik Pradip K, Chen Si L, Han Haesook, Cox Seonghyeok L, Liebsch Jasmin, Ros M Blanca, Selvi Velayutham Thamil, Aripin Nurul Fadhilah Kamalul, Martinez-Felipe Alfonso
Chemical Processes and Materials Research Group, Just Transition Lab, Centre for Energy Transition, School of Engineering, University of Aberdeen, King's College, Aberdeen AB24 3UE, UK.
Department of Chemistry and Biochemistry, University of Nevada Las Vegas, 4505 S. Maryland Parkway, Box 454003, Las Vegas, NV 89154, USA.
Molecules. 2024 Sep 20;29(18):4459. doi: 10.3390/molecules29184459.
In this work, we describe the phase behaviour and the dielectric and conductivity response of new light-responsive ionic liquid crystals, ILCs, which can be applied as controllable electrolytes. The materials include two different dicationic viologens, the asymmetric 6BP18 and the symmetric EV2ON(Tf), containing bistriflimide as the counterions, mixed with 5% and 50% molar, respectively, of one new photoresponsive mesogen called CNAzO14. These mixtures exhibit liquid crystal behaviour, light responsiveness through the - photoisomerisation of the azobenzene groups in CNAzO14, and strong dielectric responses. The 5%-CNAzO14/Ev2ON(Tf) mixture displays direct current conductivities in the 10 S·cm range, which can be increased by a two-fold factor upon the irradiation of UV light at 365 nm. Our findings set the grounds for designing new smart ionic soft materials with nanostructures that can be tuned and used for energy conversion and storage applications.
在这项工作中，我们描述了新型光响应离子液晶（ILCs）的相行为、介电响应和电导率响应，这些离子液晶可作为可控电解质应用。材料包括两种不同的双阳离子紫精，不对称的6BP18和对称的EV2ON(Tf)，以双三氟甲磺酰亚胺作为抗衡离子，分别与5%和50%摩尔的一种名为CNAzO14的新型光响应液晶基元混合。这些混合物表现出液晶行为、通过CNAzO14中偶氮苯基团的光异构化实现光响应以及强烈的介电响应。5%-CNAzO14/Ev2ON(Tf)混合物的直流电导率在10 S·cm范围内，在365 nm紫外光照射下可提高两倍。我们的研究结果为设计具有可调控纳米结构的新型智能离子软材料奠定了基础，这些材料可用于能量转换和存储应用。
