10.1021/cm903555s
This study presents the synthesis, physical properties, and self-assembly of a novel type of discotic mesogens based on triphenylene-fused triazatruxenes. These disc-shaped molecules were prepared through microwave-assisted Suzuki coupling reactions and FeCl3-mediated oxidative cyclodehydrogenation. They exhibit extended π-conjugation and possess favorable HOMO energy levels for efficient charge injection from electrodes like gold. The thermal behavior and self-assembly of these mesogens were investigated using techniques such as thermogravimetric analysis, differential scanning calorimetry, polarizing optical microscopy, and variable-temperature X-ray diffraction, revealing good thermal stability and thermotropic liquid crystalline behavior. The charge carrier mobilities of these compounds were determined using the space-charge limited-current (SCLC) technique, with high hole mobilities obtained for TP-TATC6 and TP-TATC12.
10.1055/s-0028-1087950
The research presents the synthesis of novel chiral ionic liquids (CILs) based on L-(+)-tartaric acid, leveraging its low cost and renewability as a chiral pool source. The study's main content involves a two-step synthesis strategy: first, reacting L-tartaric acid with benzylamine to form pyrrolidindione, followed by reduction with LiAlH4 to obtain benzylpyrrolidine. Subsequent quaternization with benzyl or n-dodecyl bromide under conventional or microwave heating yielded the desired chiral pyrrolidinium salts. The synthesized compounds were characterized by their melting points, and anion exchange was performed to obtain different ionic liquids. The researchers also examined the crystallographic structures of selected compounds to understand the absence of hydrogen-bonding interactions between cations, which contributed to the reduced melting points. The chiral recognition ability of these ionic materials was evaluated through NMR spectroscopy, observing the interaction between the synthesized cations and Mosher acid anion, which indicated the formation of diastereomeric salts. This research provides a foundation for further investigation into the potential of these CILs as solvents, catalysts, or ligands in asymmetric synthesis.
10.1016/j.tetlet.2009.05.047
The study presents the development of 1,3- and 1,4-bis-[1-(4-nitrophenyl)-benzimidazolium-3-methylene]benzene-based molecular probes that selectively interact with cyanide ions, causing a shift in absorbance from 270 nm to 376 nm. These probes are designed for the ratiometric chromogenic estimation of cyanide ions within the concentration range of 1–270 μM, which is crucial for practical applications due to cyanide's toxicity and environmental significance. The chemicals used in the study include 1-(4-nitrophenyl)benzimidazole, dodecylbromide, NH4PF6, and various anions such as AcO-, F-, CN-, and H2PO4-. These chemicals serve to synthesize the probes and test their selectivity and sensitivity towards cyanide ions. The probes were found to be highly selective and sensitive to cyanide ions, with the ability to estimate concentrations independent of the receptor concentration, making them valuable tools for detecting cyanide in environmental and biological samples.
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