Design and synthesis of extended pyrene based discotic liquid crystalline dyes
| Autor: | V. A. Raghunathan, Mahesh Pruthvi, Sivakumar Irla, Sandeep Kumar |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Materials science
Liquid crystalline Process Chemistry and Technology General Chemical Engineering Supramolecular chemistry Mesophase 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Scholl reaction law.invention chemistry.chemical_compound Differential scanning calorimetry Optical microscope chemistry Chemical engineering law Molecule Pyrene 0210 nano-technology |
| Zdroj: | Dyes and Pigments. 194:109574 |
| ISSN: | 0143-7208 |
| Popis: | The past few years have witnessed tremendous progress towards the design of new liquid crystalline (LC) materials comprised of rigid π-conjugated molecules, particularly disc shape molecules with appropriate substitution as an active component for the electronic device applications. Herein we report a new class of polycyclic aromatic hydrocarbons (PAHs) derived from pyrene core. These molecules are synthesized with 1, 6 dibromo pyrene and di-substituted arylethynylene via palladium-catalyzed cyclopentannulation followed by Scholl reaction. LC properties of these compounds were studied using a polarizing optical microscope, differential scanning calorimetry and X-ray diffractometry. Synthesized molecules show the hexagonal columnar mesophase over a wide range of temperatures. Pyrene derivatives have been extensively explored as novel dyes and widely used in various device applications. Therefore, these novel self-assembling supramolecular materials may find application in several optoelectronic devices. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect