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- W4360954851 abstract "Several novel organic ionic salts containing azophenyl groups with d-π-A structural unit was synthesized through the quaternization of azophenyl imidazole derivatives and 2, 4-dinitro-chlorobenzene in refluxing xylene. The donor-acceptor structure of the new ionic salts was characterized by the UV–vis, IR, ESI-MS, and NMR spectra. And the structure of ionic salt 8 was also evidenced by its single crystal X-ray diffusion. The UV−visible absorption spectra of all compounds exhibited two major strong absorption bands about at 340 and 440 nm, attributed to the strong intra-molecular π-π* and n-π* charge transfer of the azophenyl group, respectively. The results on thermal properties of ionic salts showed that all ionic salts 7–12 with d-π-A structural unit have better thermal stabilities and higher decomposition temperatures, and ionic salt 10 has the lowest melting point at 114 °C, almost close in the temperature range of ionic liquids. The electronic effect of substituted group has a certainly effect on the absorption spectra of azophenyl group and thermal properties of ionic salt with d-π-A structural unit." @default.
- W4360954851 created "2023-03-26" @default.
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- W4360954851 date "2023-08-01" @default.
- W4360954851 modified "2023-09-27" @default.
- W4360954851 title "Syntheses and properties of imidazolium-based quaternary salts with D-π-A unit containing azobenzene groups" @default.
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- W4360954851 doi "https://doi.org/10.1016/j.molstruc.2023.135428" @default.
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