In this study, production of ct-linoleic acid concentrated from crude perilla oil by gradient cooling urea inclusion was optimized. The fatty acid composition was determined after ethyl esterification by gas chromatog...In this study, production of ct-linoleic acid concentrated from crude perilla oil by gradient cooling urea inclusion was optimized. The fatty acid composition was determined after ethyl esterification by gas chromatography （GC）. In this process, orthogonal experiment was carried out. Under optimum conditions, the maximum amount of α-linoleic acid （91.5%） was obtained at a urea to fatty acid ratio of 3, a solvent to fatty acids ratio of 7, a reaction temperature of 348 K and a crystallization time of 690 min. A simple method of gradient cooling urea inclusion was used to purify α-linolenic acid by using urea to form inclusion complexes with the saturated and the less unsaturated fatty acids, which enhanced the purity of α-linoleic acid ethyl ester by above 90%.展开更多
A novel hydrogen-bonded organic framework, HOF-TCPP(HOF = hydrogen bonded organic framework, TCPP = tetrakis(4-carboxyphenyl) porphyrin), has been synthesized via solvothermal reaction in ethylene glycol. Crystal stru...A novel hydrogen-bonded organic framework, HOF-TCPP(HOF = hydrogen bonded organic framework, TCPP = tetrakis(4-carboxyphenyl) porphyrin), has been synthesized via solvothermal reaction in ethylene glycol. Crystal structure was well determined by single-crystal X-ray diffraction and powder X-ray diffraction(PXRD). Topological analysis reveals that HOF-TCPP exhibits sql 2D layer and features 2D → 3D polycatenation. Fluorescence investigation shows that HOF-TCPP displays much higher photoluminescence(PL) intensity than the amorphous ligands TCPP, which can be ascribed to the crystalline structure and hydrogen bonds existing in the structure.展开更多
基金the National Natural Science Foundation of China (20871061)the National 973 Program of China (2008CB617512) for the financial support
文摘In this study, production of ct-linoleic acid concentrated from crude perilla oil by gradient cooling urea inclusion was optimized. The fatty acid composition was determined after ethyl esterification by gas chromatography （GC）. In this process, orthogonal experiment was carried out. Under optimum conditions, the maximum amount of α-linoleic acid （91.5%） was obtained at a urea to fatty acid ratio of 3, a solvent to fatty acids ratio of 7, a reaction temperature of 348 K and a crystallization time of 690 min. A simple method of gradient cooling urea inclusion was used to purify α-linolenic acid by using urea to form inclusion complexes with the saturated and the less unsaturated fatty acids, which enhanced the purity of α-linoleic acid ethyl ester by above 90%.
基金Supported by “Strategic Priority Research Program” of the Chinese Academy of Sciences(No.XDB20000000)the National Natural Science Foundation of China(No.21871267 and 21561009)Hainan University Youth Fund Project(hdkyxj201715)
文摘A novel hydrogen-bonded organic framework, HOF-TCPP(HOF = hydrogen bonded organic framework, TCPP = tetrakis(4-carboxyphenyl) porphyrin), has been synthesized via solvothermal reaction in ethylene glycol. Crystal structure was well determined by single-crystal X-ray diffraction and powder X-ray diffraction(PXRD). Topological analysis reveals that HOF-TCPP exhibits sql 2D layer and features 2D → 3D polycatenation. Fluorescence investigation shows that HOF-TCPP displays much higher photoluminescence(PL) intensity than the amorphous ligands TCPP, which can be ascribed to the crystalline structure and hydrogen bonds existing in the structure.
