A simple and efficient method for the iodination of aromatic compounds has been achieved in the presence of iodine and 1,4- bis（triphenylphosphonium）-2-butene peroxodisulfate.
In this work,two new metal-organic frameworks(MOFs)based on a pyrazole-imidazole heterotopic ligand,namely,SCNU-Z8(Co)and SCNU-Z8(Ni),are constructed.They are isostructural,and the crystal structure of SCNU-Z8(Co)is f...In this work,two new metal-organic frameworks(MOFs)based on a pyrazole-imidazole heterotopic ligand,namely,SCNU-Z8(Co)and SCNU-Z8(Ni),are constructed.They are isostructural,and the crystal structure of SCNU-Z8(Co)is further analyzed by single-crystal X-ray diffraction.They are 3D cationic frameworks with 1D tubular channels and possess a highly(3,9)-connected binodal gfy network topology.SCNU-Z8(Ni)can be syn-thesized in high yield with high phase purity;thus,it is selected to be further explored.A stability study shows that its framework is stable in water at different pH values and in many organic solvents.It can be applied to capture Cr_(2)O_(7)^(2-)anions in water with a moderate adsorption capacity of 130 mg/g via anion-exchanged process.Iodine molecules in vapour phase and cyclohexane solution can also be captured by SCNU-Z8(Ni).In the case of iodine vapours and iodine cyclohexane solution,the adsorption capacity reaches up to 4.1 g/g and 640 mg/g,respectively,which are among the best in MOFs.Most of the absorbed iodine molecules are stably captured in the framework and hard to release,which may be conducive to allow the permanent storage of radioactive iodine.展开更多
A straightforward and effective procedure for the synthesis of 14-aryl（alkyl）-14H-dibenzo[aj]xanthenes was described using a catalytic amount of molecular iodine under microwave irradiation to afford the correspondi...A straightforward and effective procedure for the synthesis of 14-aryl（alkyl）-14H-dibenzo[aj]xanthenes was described using a catalytic amount of molecular iodine under microwave irradiation to afford the corresponding xanthenes in good yields.展开更多
The use of supercritical fluid carbon dioxide (SFCO2) in extraction of lanolin and its alcohol is superior to the conventional solvent extraction method. Its distinctive advantages include high extractive ratio, nonto...The use of supercritical fluid carbon dioxide (SFCO2) in extraction of lanolin and its alcohol is superior to the conventional solvent extraction method. Its distinctive advantages include high extractive ratio, nontoxic and nonflammable solvents, and minimal by -product pollution. The resulting refined lanolin and its alcohol have light color and little odor, and can be used as raw materials for high grade cosmetic products.展开更多
文摘A simple and efficient method for the iodination of aromatic compounds has been achieved in the presence of iodine and 1,4- bis（triphenylphosphonium）-2-butene peroxodisulfate.
基金supported by the National Natural Science Foundation of China(No.22073032)the Natural Science Foundation of Guangdong Province(No.2022A1515011243)Students'Extracurricular Scientific Research Project of South China Normal University.
文摘In this work,two new metal-organic frameworks(MOFs)based on a pyrazole-imidazole heterotopic ligand,namely,SCNU-Z8(Co)and SCNU-Z8(Ni),are constructed.They are isostructural,and the crystal structure of SCNU-Z8(Co)is further analyzed by single-crystal X-ray diffraction.They are 3D cationic frameworks with 1D tubular channels and possess a highly(3,9)-connected binodal gfy network topology.SCNU-Z8(Ni)can be syn-thesized in high yield with high phase purity;thus,it is selected to be further explored.A stability study shows that its framework is stable in water at different pH values and in many organic solvents.It can be applied to capture Cr_(2)O_(7)^(2-)anions in water with a moderate adsorption capacity of 130 mg/g via anion-exchanged process.Iodine molecules in vapour phase and cyclohexane solution can also be captured by SCNU-Z8(Ni).In the case of iodine vapours and iodine cyclohexane solution,the adsorption capacity reaches up to 4.1 g/g and 640 mg/g,respectively,which are among the best in MOFs.Most of the absorbed iodine molecules are stably captured in the framework and hard to release,which may be conducive to allow the permanent storage of radioactive iodine.
文摘A straightforward and effective procedure for the synthesis of 14-aryl（alkyl）-14H-dibenzo[aj]xanthenes was described using a catalytic amount of molecular iodine under microwave irradiation to afford the corresponding xanthenes in good yields.
基金Science Foundation of National Education Commission(99053)
文摘The use of supercritical fluid carbon dioxide (SFCO2) in extraction of lanolin and its alcohol is superior to the conventional solvent extraction method. Its distinctive advantages include high extractive ratio, nontoxic and nonflammable solvents, and minimal by -product pollution. The resulting refined lanolin and its alcohol have light color and little odor, and can be used as raw materials for high grade cosmetic products.
