A series of novel Schiff bases bearing triazole structure were synthesized and characterized by LR and NMR. Mn（OAc）2/Schiff base efficiently catalyzed Henry reaction of nitroalkanes with aldehydes to produce the cor...A series of novel Schiff bases bearing triazole structure were synthesized and characterized by LR and NMR. Mn（OAc）2/Schiff base efficiently catalyzed Henry reaction of nitroalkanes with aldehydes to produce the corresponding products of ^-nitroalcohols, under mild conditions with high yields （up to 99%）. A reaction mechanism is proposed based on the experimental results.展开更多
Three salicylaldehyde Schiff base（SSB）, iso-PBP, PBP and EPB, were facilely synthesized and exhibited aggregation-induced emission. The introduction of C= N-N = C moiety in these SSB dyes largely extend the conjugat...Three salicylaldehyde Schiff base（SSB）, iso-PBP, PBP and EPB, were facilely synthesized and exhibited aggregation-induced emission. The introduction of C= N-N = C moiety in these SSB dyes largely extend the conjugation system and push their emission to yellow to red spectral region. These SSB dyes were negligibly fluorescent in dilute THF solution. In THF/water mixtures with high water fractions, they displayed strong yellow to red fluorescence（up to 617nm） and large Stokes shifts（up to 152 nm）. Single crystal analysis on EBP showed the longer emission of in aggregated state was attributed to the molecular packing effect as compared with that in dilute solution. The bio-imaging application indicated EBP could specifically accumulate in lipid droplets in living cells.展开更多
以氰基乙酸乙酯、2-丁酮、二乙胺和硫粉为原料,乙醇为溶剂,在一定条件下合成了4,5-二甲基-3-乙氧羰基噻吩胺,然后与六种不同的芳醛反应,合成了六种相应的Schiff碱。通过MS、~1 H NMR、IR和UV等对合成的化合物进行表征,结果表明目标产物...以氰基乙酸乙酯、2-丁酮、二乙胺和硫粉为原料,乙醇为溶剂,在一定条件下合成了4,5-二甲基-3-乙氧羰基噻吩胺,然后与六种不同的芳醛反应,合成了六种相应的Schiff碱。通过MS、~1 H NMR、IR和UV等对合成的化合物进行表征,结果表明目标产物结构与理论相符。然后对这六种目标产物进行荧光光谱性能测试,结果表明这些化合物具有较强荧光;并且通过研究溶液的极性对目标化合物荧光强度的影响,发现目标化合物的荧光强度随着溶液极性增大而增强。展开更多
基金support from the National Natural Science Foundation of China(Nos.20962018, 20862015 and 20562011)
文摘A series of novel Schiff bases bearing triazole structure were synthesized and characterized by LR and NMR. Mn（OAc）2/Schiff base efficiently catalyzed Henry reaction of nitroalkanes with aldehydes to produce the corresponding products of ^-nitroalcohols, under mild conditions with high yields （up to 99%）. A reaction mechanism is proposed based on the experimental results.
基金supported by the National Natural Science Foundation of China (No. U1608222)the State Key Laboratory of Fine Chemicals (No. KF1606)+2 种基金the State Key Laboratory of Chemo/ Biosensing and Chemometrics (No. 2016005)the Research Grants Council of Hong Kong (Nos. 16308116 and 16305015)the Innovation and Technology Commission (No. ITC-CNERC14SC01)
文摘Three salicylaldehyde Schiff base（SSB）, iso-PBP, PBP and EPB, were facilely synthesized and exhibited aggregation-induced emission. The introduction of C= N-N = C moiety in these SSB dyes largely extend the conjugation system and push their emission to yellow to red spectral region. These SSB dyes were negligibly fluorescent in dilute THF solution. In THF/water mixtures with high water fractions, they displayed strong yellow to red fluorescence（up to 617nm） and large Stokes shifts（up to 152 nm）. Single crystal analysis on EBP showed the longer emission of in aggregated state was attributed to the molecular packing effect as compared with that in dilute solution. The bio-imaging application indicated EBP could specifically accumulate in lipid droplets in living cells.
文摘以氰基乙酸乙酯、2-丁酮、二乙胺和硫粉为原料,乙醇为溶剂,在一定条件下合成了4,5-二甲基-3-乙氧羰基噻吩胺,然后与六种不同的芳醛反应,合成了六种相应的Schiff碱。通过MS、~1 H NMR、IR和UV等对合成的化合物进行表征,结果表明目标产物结构与理论相符。然后对这六种目标产物进行荧光光谱性能测试,结果表明这些化合物具有较强荧光;并且通过研究溶液的极性对目标化合物荧光强度的影响,发现目标化合物的荧光强度随着溶液极性增大而增强。
