A series of tetraphenylporphyrin-based thermotropic liquid crystals containing oligo(dimethylsiloxane) were synthesized. These disc-coil hybrids form ordered nanostructures with periodic sizes on the sub-5 nm scale, including oblique columnar, lamellar, and hexagonal columnar phases. Films with sub-5 nm line patterns and homeotropically aligned columnar structures can be obtained by substrate-induced self-assembly.
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http://dx.doi.org/10.1039/d1cc05886j | DOI Listing |
Small Methods
December 2024
Department of Chemical Sciences, Indian Institute of Science Education and Research Mohali, Knowledge city, Sector 81 Manauli PO, SAS Nagar, 140306, India.
The future of next-generation electronics relies on low-cost organic semiconductors that are tailored to simultaneously provide all requisite optoelectronic properties, focusing greatly on ambipolar charge-transport and solution processability. In this regard, room-temperature discotic liquid crystals (DLCs) are potential candidates, where quasi-1D self-assembly affords a charge-transport channel along their columnar axis. This work shows a molecular design strategy by utilizing anthraquinone as the primary motif, surrounded by ester functionalized tri-alkoxy phenyl units to develop room-temperature DLCs (1.
View Article and Find Full Text PDFSmall
December 2024
Beijing Advanced Innovation Center for Materials Genome Engineering, Institute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing, 100083, China.
Polymer-stabilized liquid crystals (PSLCs) are widely used in smart windows, light modulators, and dimmed glass. However, their low mechanical strength, unsatisfactory electro-optical properties, and poor durability limit their large-scale application. In this study, a PSLC film with outstanding performance is prepared by incorporating a multifunctional molecule into a fine-sculptured liquid crystal/polymer composite.
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November 2024
Soft Condensed Matter and Biophysics, Debye Institute for Nanomaterials Science, Utrecht University, 3584 CC Utrecht, The Netherlands.
Rod-like objects at high packing fractions can exhibit liquid crystalline ordering. By controlling how the rods align near a boundary, i.e.
View Article and Find Full Text PDFThe alignment control of liquid crystals (LCs) is critical for various practical applications. The pretilt angle modulation of LCs typically requires a mechanical rubbing on substrates to orient the LCs. This study presents a contact-free approach to achieve pretilt angle modulation of LCs.
View Article and Find Full Text PDFAnal Methods
December 2024
Department of Chemistry, Deen Dayal Upadhyay Gorakhpur University, Gorakhpur, 273009, India.
Mercury contamination is a global environmental issue due to its toxicity and persistence in ecosystems. It poses a particular risk in aquatic systems, where it bioaccumulates and biomagnifies, leading to serious health impacts on humans. Therefore, effective detection technologies for mercuric ions in natural water resources are highly desirable.
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