De Joydip, Devi Manisha, Shah Asmita, Gupta Santosh Prasad, Bala Indu, Singh Dharmendra Pratap, Douali Redouane, Pal Santanu Kumar
Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Mohali, Sector-81, SAS Nagar, Knowledge City, Manauli 140306, India.
Univ. Littoral Côte d'Opale, UR 4476, UDSMM, Unité de Dynamique et Structure des Matériaux Moléculaires, F-62228 Calais, France.
J Phys Chem B. 2020 Nov 12;124(45):10257-10265. doi: 10.1021/acs.jpcb.0c07052. Epub 2020 Nov 2.
The high demand and scarcity of luminescent, photoconductive, and transparent gels necessitate its finding as they are potential components in photonic devices such as solar cell concentrators where optical losses via scattering and reabsorption require to be minimized. In this direction, we have reported highly transparent, blue luminescent as well as photoconductive gels exhibiting the hole mobility of 10 cm/V s at ambient temperature as investigated by the time-of-flight technique. The -driven self-standing supergels were formed using triazole-modified phenylene-vinylene derivatives as gelators in a nonpolar solvent. Different microscopic studies revealed its entangled network of interwoven fibrilar self-assembly and anisotropic order in the gel state. Supramolecular assembly of xerogels, studied by small- and wide-angle X-ray scattering (SAXS/WAXS) suggesting their local columnar hexagonal (Col) superstructure, is beneficial for conducting gels. Rheological measurements direct the stiffness and robustness of the organogels. In addition, the gelators were developed as a sensing platform for the ultrasensitive detection of Fe(II) ions at ppb level. H nuclear magnetic resonance (NMR) titrimetric studies revealed that the interaction of the H-atom of triazole units with Fe(II) is responsible for quenching of blue fluorescence. Also, one of the gelators was successfully applied in bio-imaging using the pollen grains of the plant.
发光、光电导和透明凝胶的高需求和稀缺性使得寻找它们成为必要，因为它们是光子器件（如太阳能电池聚光器）中的潜在组件，在这些器件中，通过散射和再吸收造成的光学损失需要最小化。在这个方向上，我们报道了高度透明、蓝色发光以及光电导凝胶，通过飞行时间技术研究发现，其在室温下的空穴迁移率为10 cm²/V·s。使用三唑修饰的亚苯基亚乙烯基衍生物作为凝胶剂，在非极性溶剂中形成了由离子驱动的自立式超级凝胶。不同的微观研究揭示了其在凝胶状态下相互交织的纤维状自组装和各向异性有序的缠结网络。通过小角和广角X射线散射（SAXS/WAXS）研究干凝胶的超分子组装，表明它们具有局部柱状六方（Col）超结构，这对导电凝胶是有益的。流变学测量表明了有机凝胶的刚度和稳健性。此外，这些凝胶剂被开发为一个传感平台，可以超灵敏地检测ppb水平的Fe(II)离子。¹H核磁共振（NMR）滴定研究表明，三唑单元的H原子与Fe(II)的相互作用导致蓝色荧光猝灭。此外，其中一种凝胶剂已成功应用于使用该植物花粉粒的生物成像。
