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[en] We have successfully synthesized the polystyrene carrying a conformationally rigid myo-inositol substituent as a possible metal-chelating ligand. We are further investigating the metal binding properties of this polymer and its applicability to the practical use such as molecular imprinting. Compounds having three syn-axial hydroxyl groups on a six membered ring draw an interest due to their ability to form complexes with many cations. The steric requirements of the cyclohexane polyols to form complexes with cations are, however, rather strict and only a few such compounds with three syn-axial hydroxyls, including cis-inositol, were known. Moreover, none of these compounds is readily available, especially in large scales. Recently, synthesis of the readily available myo-inositol 4,6-carbonate with three hydroxyl groups at the axial position on a cyclohexane was reported. To our knowledge, this was the first example of the conformationally rigid cyclohexane polyols using the readily available myo-inositol
[en] A series of deep eutectic solvents (DESs) were prepared using glycerol and choline chloride (ChCl), and Fourier transform infrared spectrometer (FT-IR) was used to analyze the spectra of glycerol, choline chloride and DESs based on glycerol and choline chloride. Then DESs were used as the additives of mobile phase to optimize chromatographic behavior of caffeic acid in high performance liquid chromatography (HPLC). A 17-run Box-Behnken design (BBD) was employed to evaluate effect of DESs as additives by analyzing the maximum theoretical plate number. Three factors, reaction temperature (60 .deg. C, 80 .deg. C, 100 .deg. C), molar ratio of glycerol and choline chloride (2 : 1, 3 : 1, 4 : 1, n/n), and volume percent of additives (0.05%, 0.10%, 0.15%, v/v), were investigated in BBD. The optimum experiment condition was that of reaction temperature (80 .deg. C), molar ratio of glycerol and ChCl (3 : 1, n/n), and volume percent of additive (0.10%, v/v). The mean chromatographic theoretical plate number of the caffeic acid this condition was 1567.5, and DESs as additives shorten the retention time and modify the chromatogram shape, proving DESs as additives for effective theoretical plate number and column efficiency in HPLC.