Some properties of nematic liquid crystal E7 doped with two disperse orange dyes used together and effect of addition of carbon nanoparticles （single walled carbon nanotube or fullerene C60） on them were studied. Tw...Some properties of nematic liquid crystal E7 doped with two disperse orange dyes used together and effect of addition of carbon nanoparticles （single walled carbon nanotube or fullerene C60） on them were studied. Two dyes （disperse orange 11 and 13） having high solubility and order parameter were used as co-dopants. A notable increase in order parameter was obtained comparing to that of liquid crystal doped with single dye. When carbon nanoparticles were used as dopant, a decrease in order parameter was observed at low temperatures while it increased at high temperatures. When applied voltage changed, the order parameter abruptly increased in its threshold value and saturated in higher voltages as expected. An appreciable change in textures was not observed with addition of dopants. This addition gave rise to an increase in nematic-isotropic phase transition temperatures compared with that of pure liquid crystal.展开更多
Sudan Red are the chemosynthesis dyes of series of azo, which are mainly used as coloring additives in ma- nufacturing of some products, such as the wax, the oil-dyes, the petrol, and etc. In the process of food produ...Sudan Red are the chemosynthesis dyes of series of azo, which are mainly used as coloring additives in ma- nufacturing of some products, such as the wax, the oil-dyes, the petrol, and etc. In the process of food production, Sudan Dyes are banned to be used as food dyes in our country.展开更多
[Objectives]This study aimed to analyze the dyeing status and dyeing components of counterfeit cinnabar(elutriation),in order to provide technical basis for cinnabar(elutriation)supervision.[Methods]The scarlet 808 in...[Objectives]This study aimed to analyze the dyeing status and dyeing components of counterfeit cinnabar(elutriation),in order to provide technical basis for cinnabar(elutriation)supervision.[Methods]The scarlet 808 in cinnabar(elutriation)was identified qualitatively using thin-layer chromatography(TLC)and high-performance liquid chromatography(HPLC),and the positive samples were confirmed by high-performance liquid chromatography-mass spectrometry(HPLC-MS).The conditions were as follows:column,Agilent Eclipse Plus C 18;mobile phase,acetonitrile-0.1%formic acid(85∶15);detection wavelength,520 nm;ion source,electrospray ion source;scanning mode,positive ion scanning;scanning range,100-700 m/z;cone voltage,3.5 kv;drying gas temperature,350℃;drying gas flow rate,12 L/min.[Results]The thin-layer chromatography spots were clear and separated well.Among the 13 batches of samples,12 batches were positive for scarlet 808.[Conclusions]The counterfeit cinnabar(elutriation)currently circulating in the market has dyeing problem,with scarlet 808 as the dye.The TLC,HPLC and HPLC-MS methods established in this article can quickly screen and confirm the scarlet 808 in cinnabar(elutriation).展开更多
A novel liquid dye 2-((2E,5E)-2,5-bis(4-(methyl(2,5, 8,11-tetraoxatridecan-13-yl)amino)benzylidene)cyclopentylidene) malononitrile (TO-BDCM) was synthesized by incorporating two oligo(ethenyl glycol) groups into the b...A novel liquid dye 2-((2E,5E)-2,5-bis(4-(methyl(2,5, 8,11-tetraoxatridecan-13-yl)amino)benzylidene)cyclopentylidene) malononitrile (TO-BDCM) was synthesized by incorporating two oligo(ethenyl glycol) groups into the backbone of a prototype malononitrile derivative (BDCM) for the purpose of increasing its solubility in organic solvents. The nonlinear absorption properties of this liquid dye on 1064 nm ns pulsed laser were investigated in DMF with remarkably high concentration up to ~1M, showing a superior large nonlinear absorption coefficient of 55.6 cm3/GW2. Fairly good optical limiting and stabilization effects were achieved. Meanwhile, the liquid dye exhibited equivalent stability under laser irradiation compared to its prototype dye BDCM.展开更多
A series of guanidinium ionic liquids（GILs） was designed, synthesized, and used as electrolytes for dye-sensitized solar cells（DSSCs）. The effect of electrolytes containing GILs on the photovoltaic performance of ...A series of guanidinium ionic liquids（GILs） was designed, synthesized, and used as electrolytes for dye-sensitized solar cells（DSSCs）. The effect of electrolytes containing GILs on the photovoltaic performance of DSSCs was investigated. It is demonstrated that these GILs are promising for being used as electrolytes for DSSCs and a conversion efficiency of 4.1% can be obtained under AM 1.5 sun light irradiation.展开更多
Fluorinated oligomer gel is suitable to the electrolyte of dye sensitized solar cell. This article studied mainly in the scope of electric conductivity, including ionic liquid in the electrolyte. It was found that the...Fluorinated oligomer gel is suitable to the electrolyte of dye sensitized solar cell. This article studied mainly in the scope of electric conductivity, including ionic liquid in the electrolyte. It was found that the ratio of mixing with dimetyl sulfoxide and the concentration of LiI affect the conductivity. The behavior is different depending on the type of ionic liquid. Although the mixing ionic liquid enhances the conductivity, the short circuit current density of assembled solar cell with it was suppressed so much.展开更多
Hierarchical BiOBr microspheres with oxygen vacancies, which can be used for the dyes removal, have been synthesized successfully in the presence of different kinds of ionic liquids. It was revealed that BiOBr prepare...Hierarchical BiOBr microspheres with oxygen vacancies, which can be used for the dyes removal, have been synthesized successfully in the presence of different kinds of ionic liquids. It was revealed that BiOBr prepared by the ionic liquids with short chain length exhibited higher photocatalytic activity in the degradation of methyl orange （MO） under visible light. The experimental results showed that the phenomenon of the photocatalytic degradation of MO can be explained by the photoluminescence spectra.展开更多
文摘Some properties of nematic liquid crystal E7 doped with two disperse orange dyes used together and effect of addition of carbon nanoparticles （single walled carbon nanotube or fullerene C60） on them were studied. Two dyes （disperse orange 11 and 13） having high solubility and order parameter were used as co-dopants. A notable increase in order parameter was obtained comparing to that of liquid crystal doped with single dye. When carbon nanoparticles were used as dopant, a decrease in order parameter was observed at low temperatures while it increased at high temperatures. When applied voltage changed, the order parameter abruptly increased in its threshold value and saturated in higher voltages as expected. An appreciable change in textures was not observed with addition of dopants. This addition gave rise to an increase in nematic-isotropic phase transition temperatures compared with that of pure liquid crystal.
文摘Sudan Red are the chemosynthesis dyes of series of azo, which are mainly used as coloring additives in ma- nufacturing of some products, such as the wax, the oil-dyes, the petrol, and etc. In the process of food production, Sudan Dyes are banned to be used as food dyes in our country.
文摘[Objectives]This study aimed to analyze the dyeing status and dyeing components of counterfeit cinnabar(elutriation),in order to provide technical basis for cinnabar(elutriation)supervision.[Methods]The scarlet 808 in cinnabar(elutriation)was identified qualitatively using thin-layer chromatography(TLC)and high-performance liquid chromatography(HPLC),and the positive samples were confirmed by high-performance liquid chromatography-mass spectrometry(HPLC-MS).The conditions were as follows:column,Agilent Eclipse Plus C 18;mobile phase,acetonitrile-0.1%formic acid(85∶15);detection wavelength,520 nm;ion source,electrospray ion source;scanning mode,positive ion scanning;scanning range,100-700 m/z;cone voltage,3.5 kv;drying gas temperature,350℃;drying gas flow rate,12 L/min.[Results]The thin-layer chromatography spots were clear and separated well.Among the 13 batches of samples,12 batches were positive for scarlet 808.[Conclusions]The counterfeit cinnabar(elutriation)currently circulating in the market has dyeing problem,with scarlet 808 as the dye.The TLC,HPLC and HPLC-MS methods established in this article can quickly screen and confirm the scarlet 808 in cinnabar(elutriation).
文摘A novel liquid dye 2-((2E,5E)-2,5-bis(4-(methyl(2,5, 8,11-tetraoxatridecan-13-yl)amino)benzylidene)cyclopentylidene) malononitrile (TO-BDCM) was synthesized by incorporating two oligo(ethenyl glycol) groups into the backbone of a prototype malononitrile derivative (BDCM) for the purpose of increasing its solubility in organic solvents. The nonlinear absorption properties of this liquid dye on 1064 nm ns pulsed laser were investigated in DMF with remarkably high concentration up to ~1M, showing a superior large nonlinear absorption coefficient of 55.6 cm3/GW2. Fairly good optical limiting and stabilization effects were achieved. Meanwhile, the liquid dye exhibited equivalent stability under laser irradiation compared to its prototype dye BDCM.
文摘A series of guanidinium ionic liquids（GILs） was designed, synthesized, and used as electrolytes for dye-sensitized solar cells（DSSCs）. The effect of electrolytes containing GILs on the photovoltaic performance of DSSCs was investigated. It is demonstrated that these GILs are promising for being used as electrolytes for DSSCs and a conversion efficiency of 4.1% can be obtained under AM 1.5 sun light irradiation.
文摘Fluorinated oligomer gel is suitable to the electrolyte of dye sensitized solar cell. This article studied mainly in the scope of electric conductivity, including ionic liquid in the electrolyte. It was found that the ratio of mixing with dimetyl sulfoxide and the concentration of LiI affect the conductivity. The behavior is different depending on the type of ionic liquid. Although the mixing ionic liquid enhances the conductivity, the short circuit current density of assembled solar cell with it was suppressed so much.
基金supported by funding from The Chinese Ministry of Education for the Scientific Key Project (No. 109094)
文摘Hierarchical BiOBr microspheres with oxygen vacancies, which can be used for the dyes removal, have been synthesized successfully in the presence of different kinds of ionic liquids. It was revealed that BiOBr prepared by the ionic liquids with short chain length exhibited higher photocatalytic activity in the degradation of methyl orange （MO） under visible light. The experimental results showed that the phenomenon of the photocatalytic degradation of MO can be explained by the photoluminescence spectra.
