Entity

Time filter

Source Type


Song S.,Sun Yat Sen University | Song S.,South China University of Technology | Liu X.,South China University of Technology | He D.,South China University of Technology | Zhu Y.,Guangdong Research Institute of Petrochemical Industry
Asian Journal of Chemistry | Year: 2015

A Schiff base compound, N′-(2,4-dichlorobenzylidene)-4-methylbenzohydrazide (C15H12N2OCl2) has been synthesized by the condensation of 4-methylbenzohydrazide and 2,4-dichloro benzaldehyde in an ethanol solution. The Schiff base was characterized by 1H NMR, MS and single crystal X-ray diffraction. The crystal structure and antibacterial activity of the compound are reported herein. The crystal belongs to the triclinic system, space group P1 with a = 6.9796 (4), b = 11.5134 (6), c = 12.5679 (7) A˚, α = 115.274(1)°, β = 97.009 (1)°, γ = 94.578 (1)°, Z = 2, V = 896.60 (9) A˚, Dc = 1.375 g/cm3, Mr = 371.25, λ(Mokα) = 0.71073 A˚, μ = 0.379 mm-1, F (000) = 388. The final R = 0.0344, wR = 0.0984 for 2955 observed reflections with I >σ (I). The two benzene rings are nearly coplanar with the dihedral angle 1.56°. Three classical intermolecular hydrogen bonds exist in the crystal. The compound molecules are connected through hydrogen bonds to generate a two-dimensional network. The results of preliminary biological activity assay showed that the title compound exhibited good antibacterial activity against Staphylococcus aureus and Escherichia coli. © 2015, Chemical Publishing Co. All rights reserved. Source


He D.,South China University of Technology | Liu X.,South China University of Technology | Zhu Y.,Guangdong Research Institute of Petrochemical Industry
Asian Journal of Chemistry | Year: 2015

A Schiff base compound, N′-(2-bromobenzylidene)-4-methylbenzohydrazide (m.f. C15H13N2OBr) has been synthesized by the condensation of 4-methylbenzohydrazide and 2-bromobenzaldehyde in an ethanol solution. The compound was characterized by 1H NMR, MS and single crystal X-ray diffraction. Here, we first report the crystal structure and antibacterial activities of the title compound. The crystal belongs to the orthorhombic system, space group Pna21 with a = 9.5295 (6), b = 11.4154 (7), c = 12.5957 (8) A˚, Z = 4, V = 1370.20 (15) A˚, Dc = 1.538 g/cm3, Mr = 317.18, λ(MoKα) = 0.71073 A˚, μ = 2.993 mm-1, F(000) = 640. The final R = 0.0292, wR = 0.0674 for 1904 observed reflections with I > 2σ (I). The dihedral angle between the two phenyl rings is 16.31°. The structure exhibits intermolecular hydrogen bonding of N-H⋯O type. The title compound molecules are connected through hydrogen bonds to generate a one-dimensional chain. The preliminary biological activity assay results showed that the title compound exhibited good antibacterial activity against Staphylococcus aureus and Escherichia coli. © 2015, Chemical Publishing Co. All rights reserved. Source


Zhu Y.-C.,South China University of Technology | Zhu Y.-C.,Guangdong Research Institute of Petrochemical Industry | Liu X.-P.,South China University of Technology | He D.-H.,South China University of Technology | Wu W.-D.,South China University of Technology
Jiegou Huaxue | Year: 2013

A new Schiff base compound, 4,4'-hydrazine-1,2- diylidenebis(methanylylidene)- bis(2- ethoxyphenol) (C18H 20N2O4), has been synthesized by the condensation of 3-ethoxy-4- hydroxybenzaldehyde and 80% hydrazine hydrate in an ethanol solution. The compound was characterized by 1H NMR, MS and single-crystal X-ray diffraction. The crystal belongs to the monoclinic system, space group P21/n with a = 5.2421(5), b = 10.3700(8), c = 14.9906(11) Å, β = 97.6030(10)°, Z = 2, V = 807.73(12) Å, Dc = 1.350 g/cm 3, Mr = 328.36, λ(MoKa) = 0.71073 Å, μ = 0.096 mm-1, F(000) = 348, R = 0.041 and wR = 0.0136. The two benzene rings are coplanar. The molecule adopts an E,E configuration about the central C=N functional bonds. A total of 3938 unique reflections were collected, of which 1440 with I > 2ν(I) were observed. A different type of intermolecular hydrogen bond, O-H⋯N, exists in the crystal. The title complex molecules are connected through hydrogen bonds to generate a two-dimensional network. The preliminary antibacterial activity results showed that the title compound exhibits antibacterial activity against Staphylococcus aureus. Copyright © 2008 Chinese Journal of Structural Chemistry. Source


Zhu Y.-C.,South China University of Technology | Zhu Y.-C.,Guangdong Research Institute of Petrochemical Industry | Lu H.-X.,South China University of Technology | He D.-H.,South China University of Technology | Yang Z.-R.,South China University of Technology
Journal of Photochemistry and Photobiology B: Biology | Year: 2013

Two novel symmetrical stilbene optical brighteners based on 1,3,4-oxadiazole bearing sodium sulfonate unit were synthesized. The two target compounds were characterized by NMR and elemental analysis. The photophysical processes of the target compounds were investigated by UV-Vis absorption and fluorescence emission spectra in different solutions. The two optical brighteners were tested as radiation protectants for the Spodoptera litura nuclear polyhedrosis virus (SINPV) against 2nd-instar S. litura larvae. The results indicate that the two compounds exhibit strong blue fluorescence emission, and the fluorescence quantum yield in DMF is 0.86 and 0.75, respectively. The insecticidal effect of SINPV is increased by the addition of the two compounds and especially the compound 3b shows more obvious synergy effect. © 2013 Elsevier B.V. Source


Huang Q.-R.,Guangdong Research Institute of Petrochemical Industry | Yang W.-H.,Guangdong Research Institute of Petrochemical Industry | Qiu M.-J.,Guangdong Research Institute of Petrochemical Industry | Luan A.-B.,Guangdong Research Institute of Petrochemical Industry
Chung-kuo Tsao Chih/China Pulp and Paper | Year: 2011

Polyhexamethylene Guanidine hydrochloride(PHGG) presents high antibacterial efficiency for almost all of bacterium in papermaking process, such as Pseudomonas, Aerobacter, Bacillus, proteus and so on. The sterilization rate in white water keeps 80% above in 8 hour at the dosage of 30 mg/L PHGG. Also the PHGG presents high efficiency in eliminating the stickies and pitches and restricts sedimentation of calcium carbonate. In the simulation experiment, more than 50% stickies quantity is removed from the water system when 5% PHGG is used. Using PHGG as bactericide and aggradation control agent in the production line, the paper machine becomes more clean and runs more smoothly. Source

Discover hidden collaborations