An arylhydrazono-containing coumarin derivative(1) can undergo chemical conversions in two modes. When in the presence of Cu^(2+), a Cu^(2+)-promoted cyclization reaction was observed in aqueous acetonitrile and gives...An arylhydrazono-containing coumarin derivative(1) can undergo chemical conversions in two modes. When in the presence of Cu^(2+), a Cu^(2+)-promoted cyclization reaction was observed in aqueous acetonitrile and gives compound 2, while a ring-opening reaction occurs to give compound 3 in the absence of Cu^(2+). Both 2 and 3 were characterized by single-crystal X-ray diffraction. Compound 2 crystallizes in monoclinic C2/c space group with a = 26.606(5), b = 5.8142(12), c = 26.906(5) ?, β = 103.41(3)°, Z = 8, F(000) = 1696, μ = 0.186 mm^(-1), R = 0.0487 and wR = 0.1129. Compound 3 crystallizes in monoclinic P21/n space group with a = 9.917(2), b = 13.644(3), c = 15.912(3) ?, β = 95.38(3)°, Z = 4, F(000) = 896, μ = 0.182 mm^(-1), R = 0.0769 and w R = 0.1617. The spectroscopic studies show that compound 2 exhibits strong fluorescence emission.展开更多
An AIE-active azine derivative(1)was facilely synthesized by aldehyde-amine condensation of 2-hydroxy-1-naphthaldehyde and 3-methyl-2-benzothiazolinone hydrazone.It crystallizes in the monoclinic space group P21/n wit...An AIE-active azine derivative(1)was facilely synthesized by aldehyde-amine condensation of 2-hydroxy-1-naphthaldehyde and 3-methyl-2-benzothiazolinone hydrazone.It crystallizes in the monoclinic space group P21/n with a=8.2176(5),b=13.1733(7),c=14.5731(8)Å,β=90.521(5)º,and Z=4.Compound 1 exhibits aggregation-induced emission characteristics.In dilute solution,it is non-emissive,while strong emission was observed in the aqueous medium as a result of the molecular aggregation in poor solvent.The powder and crystals of 1 also exhibit strong fluorescence.In its crystal lattice,the molecules stack in a face-to-face style,but there is noπ-πstacking interaction due to the long distance between adjacent molecules.It is the loose stacking mode that blocks the nonradiative decay channel resulting in its AIE effect.展开更多
基金supported by the Natural Science Foundation of Hainan Province(No.20162028)the Program for Innovative Research Team in University(IRT-16R19)
文摘An arylhydrazono-containing coumarin derivative(1) can undergo chemical conversions in two modes. When in the presence of Cu^(2+), a Cu^(2+)-promoted cyclization reaction was observed in aqueous acetonitrile and gives compound 2, while a ring-opening reaction occurs to give compound 3 in the absence of Cu^(2+). Both 2 and 3 were characterized by single-crystal X-ray diffraction. Compound 2 crystallizes in monoclinic C2/c space group with a = 26.606(5), b = 5.8142(12), c = 26.906(5) ?, β = 103.41(3)°, Z = 8, F(000) = 1696, μ = 0.186 mm^(-1), R = 0.0487 and wR = 0.1129. Compound 3 crystallizes in monoclinic P21/n space group with a = 9.917(2), b = 13.644(3), c = 15.912(3) ?, β = 95.38(3)°, Z = 4, F(000) = 896, μ = 0.182 mm^(-1), R = 0.0769 and w R = 0.1617. The spectroscopic studies show that compound 2 exhibits strong fluorescence emission.
基金supported by the Natural Science Foundation of Hainan Province(No.20162028)the Program for Innovative Research Team in University(IRT-16R19)。
文摘An AIE-active azine derivative(1)was facilely synthesized by aldehyde-amine condensation of 2-hydroxy-1-naphthaldehyde and 3-methyl-2-benzothiazolinone hydrazone.It crystallizes in the monoclinic space group P21/n with a=8.2176(5),b=13.1733(7),c=14.5731(8)Å,β=90.521(5)º,and Z=4.Compound 1 exhibits aggregation-induced emission characteristics.In dilute solution,it is non-emissive,while strong emission was observed in the aqueous medium as a result of the molecular aggregation in poor solvent.The powder and crystals of 1 also exhibit strong fluorescence.In its crystal lattice,the molecules stack in a face-to-face style,but there is noπ-πstacking interaction due to the long distance between adjacent molecules.It is the loose stacking mode that blocks the nonradiative decay channel resulting in its AIE effect.
