New functionalized spiroxazine containing azo group has been prepared and its photochromic mechanism has been investigated by laser induced time-resolved techniques.
Ah initio calculations have been performed for 6-X-2(1H)-Pyridones (X=H, NH2, Cl,CH3, NO2) and their tautomers in the gas phase and in aqueous solution at HF/6-311G level, the solvent effects were investigated with On...Ah initio calculations have been performed for 6-X-2(1H)-Pyridones (X=H, NH2, Cl,CH3, NO2) and their tautomers in the gas phase and in aqueous solution at HF/6-311G level, the solvent effects were investigated with Onsager SCRF model. The substituent effects predicted by theoretical calculations are in satisfactory agreement with the experimental values, and the results obtained indicate the significance of solvent effects involved in this system.展开更多
A metal-free porphyrin covalent organic framework was employed as the heterogeneous photocatalyst for the synthesis of tetrahydroquinolines under aerobic conditions.With visible light irradiation of a catalytic amount...A metal-free porphyrin covalent organic framework was employed as the heterogeneous photocatalyst for the synthesis of tetrahydroquinolines under aerobic conditions.With visible light irradiation of a catalytic amount of H_(2)P-Bph-COF at room temperature,various substituted N,N-dimethylanilines and N-aryl maleimides were transformed to tetrahydroquinoline derivatives in moderate to good yields.This was the first example of the synthesis of tetrahydroquinolines via the photocatalytic aerobic annulation reaction employing the metal-free COF as the heterogeneous photocatalyst.展开更多
文摘New functionalized spiroxazine containing azo group has been prepared and its photochromic mechanism has been investigated by laser induced time-resolved techniques.
文摘Ah initio calculations have been performed for 6-X-2(1H)-Pyridones (X=H, NH2, Cl,CH3, NO2) and their tautomers in the gas phase and in aqueous solution at HF/6-311G level, the solvent effects were investigated with Onsager SCRF model. The substituent effects predicted by theoretical calculations are in satisfactory agreement with the experimental values, and the results obtained indicate the significance of solvent effects involved in this system.
基金the financial support from the National Natural Science Foundation of China(Nos.22101158,22171169,21971153 and 21772116)the Natural Science Foundation of Shandong Province(No.ZR2021MB088)+2 种基金the Taishan Scholars Climbing Program of Shandong Provincethe Taishan Scholar Project of Shandong Provincethe Major Basic Research Projects of Shandong Natural Science Foundation(No.ZR2020ZD32)。
文摘A metal-free porphyrin covalent organic framework was employed as the heterogeneous photocatalyst for the synthesis of tetrahydroquinolines under aerobic conditions.With visible light irradiation of a catalytic amount of H_(2)P-Bph-COF at room temperature,various substituted N,N-dimethylanilines and N-aryl maleimides were transformed to tetrahydroquinoline derivatives in moderate to good yields.This was the first example of the synthesis of tetrahydroquinolines via the photocatalytic aerobic annulation reaction employing the metal-free COF as the heterogeneous photocatalyst.
