- A C3-symmetric colorimetric anion sensor bearing hydrazone groups as binding sites
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Tris-hydrazone (1) functioned as a colorimetric chemosensor for a variety of anions such as F-, AcO- and H2PO4-. The anion binding could be easily detected by naked-eye according to color changes. The high binding ability of the receptor 1 to anions was further investigated by UV-vis absorption spectroscopy in DMSO. The results of job plot of the receptor 1 with different anions demonstrated that the stoichiometry of the complex between 1 and F- was 1:1 (1:anion) and the stoichiometry of the other complexes studied was 1:3 (1:anion).
- Shao, Jie,Qiao, Yanhong,Lin, Hai,Lin, Huakuan
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- Synthesis and mesomorphic properties of new columnar liquid crystal containing 1,3,5-triiminebenzene with pendant 1,3,4-thiadiazole Group
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A novel discotic liquid crystal series based on 1,3,5-benzenetrisazomethine derivatives with three pendant 2-amino-5-(4′-n-alkoxy)phenyl-1,3,4- thiadiazole has been synthesized, which is the first columnar molecules containing 1,3,4-thiadiazole moiety exhibiting a discotic liquid crystal. The molecular structure of compounds was confirmed by FT-IR, 1H-NMR, and mass spectroscopy and elemental analysis. The electron excitation properties of these compounds were investigated by UV-vis absorption spectroscopy. Their liquid crystalline properties were studied by polarizing optical microscopy and differential scanning calorimetry. The formation of a columnar mesophase was found to be dependent on the number of methylene unit in alkoxy side chains.
- Al-Malki, Mustafa K.S.,Hameed, Ayad S.,Al-Dujaili, Ammar H.
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