Removal of 5-Amino-2-chlorotoluene-4-sulfonic and Chlorhydric Acids from Wastewater by Weakly Basic Resin

This research deals with an investigation of the adsorption of two acids, namely, 5-amino- 2-chlorotoluene-4-sulfonic and chlorhydric acids from their solution onto weakly basic resin. The screening of res-ins, kinetics, and isotherm were studied. The results indicate that the D301R is more appropriate for the removal of acids from solution. The adsorption of acids obeys Langmuir isotherm and the first-order kinetics model. Sorptive affinity of the two acids on D301R was found to be in the order of 5-amino-2-chlorotoluene-4-sulfonic acid> chlorhydric acid. Thermodynamic parameters for the adsorption of acids were calculated and discussed. The maxi-mum removal of acids was observed around 97% and 76% at 25℃ for 5-amino-2-chlorotoluene-4-sulfonic acid and chlorhydric acid , respectively.

Removal of 5-Amino-2-chlorotoluene-4-sulfonic and Chlorhydric Acids From Wastewater by Weakly Basic Resin: Equilibrium and Kinetics

Objective To study the adsorption of 5-Amino-2-chlorotoluene-4-sulfonic (CLT) and chlorhydric (HCl) acids from wastewater by weakly basic resin. Methods The kinetics and isotherm were studied. Thermodynamic parameters for the adsorption of acids were calculated and discussed. Results The adsorption of CLT and HCl acids followed Langmuir isotherm and the first-order kinetics model. Conclusion The adsorptive affinity of the two acids on D301R is in the order of CLT acid 〉 HCl acid. CLT and HCl acids can be separated.

Synthesis,Crystal Structure and Antitumor Activity of Tectochrysin-6-sulfonate

In order to enhance water-solubility and biological utilization rate of tectochrysin,sodium 5-hydroxyl-7-methoxyflavone-6-sulfonate（1） was synthesized and its structure was identified on the basis of ^1 H NMR,FT-IR and elemental analysis.5-Hydroxyl-7-methoxyflavone-6-sulfonate was assembled with Ni（II） or Mn（II）,hexaquanickel（II） bis（5-hydroxyl-7-methoxyflavone-6-sulfonate） tetrahydrate（2） and hexaquamanganese（II） bis（5-hydroxyl-7-methoxyflavone-6-sulfonate） tetrahydrate（3） were obtained and characterized by IR spectroscopy.The crystal structures of 2 and 3 were determined by X-ray single-crystal diffraction analysis.The results showed that 2 and 3 are isomorphous crystals and crystallize in monoclinic crystal system,space group C2/c.In 2 and 3,the supramolecular structures are organized into hydrophilic and hydrophobic regions.Hydrophilic regions are generated by O–H？？？O hydrogen bonds among sulfonate groups,latticed water molecules and coordinated water molecules.The π-π stacking interactions assemble the flavone skeletons into columns and these columns form hydrophobic regions.The sulfonate groups play an important role as a bridge of the hydrophilic and hydrophobic regions as well as the inorganic and organic components.Three-dimensional networks of 2 and 3 are furnished by extensive array of hydrogen bonds,π-π stacking interactions and electrostatic interactions.The anti-proliferative activities of 1-3 in vitro against human leukemia cells K562 and human lung cancer cells A549 were evaluated by the standard MTT assay.The pharmacological activity results showed that the introduction of sulfonic acid groups enhanced the antitumor activity of tectochrysin.

Visible-light-induced radical-cascade alkylation/cyclization of N-methacryloyl-2-phenylbenzimidazole:Access to benzoimidazo[2,1-a]isoquinolin-6(5H)-ones

A metal-free visible-light-induced synthesis of aza-polycyclic aromatic hydrocarbons via cascade alkylation/cyclization of N-methacryloyl-2-phenylbenzimidazole was developed.The reaction was carried out with inactive alkanes and cyclic ethers as alkylation reagents,and phenanthrenequinone(PQ)as a direct hydrogen-atom transfer(HAT)photocatalyst.The desired products were obtained in moderate to good yields at room temperature under air.

Argentum 5-Hydroxy-7-methoxy-2-phenyl-4H-chromen-4-one-6-sulfonate:Synthesis,Crystal Structure and Antitumor Activity

In order to improve the water solubility and bioavailability of 5-hydroxy-7-methoxyflavone,argentum 5-hydroxy-7-methoxy-2-phenyl-4H-chromen-4-one-6-sulfonate[Ag4(H2O)6](C(16)H(11)O4SO3)4·H2O(1,C(16)H(11)O4SO3=5-hydroxy-7-methoxy-2-phenyl-4H-chromen-4-one-6-sulfonate)was synthesized by sulfonation reaction.The structure of 1 was characterized by FT-IR,elemental analysis and X-ray single-crystal diffraction.Complex 1 belongs to the triclinic system,space group P1,a=8.077(4),b=12.365(4),c=17.735(7)A,V=1685.0(12)A3,Z=1,μ=1.372 mm^–1,Dc=1.936 g/cm^3,F(000)=984,the final R=0.0819 and wR=0.2332 with I>2σ(I).3D structure of 1 exhibits alternating organic and inorganic regions.O–H×××O hydrogen bonds and Ag–O coordination interactions exist among crystal water,coordinated water and sulfo group,which constructed an organic zone.Flavone skeletons form organic region of 1.Sulfo group is the bridge linking these two regions.The in vitro antitumor activity of 1 against human lymphoma cells U937 and human breast cancer cells MCF-7 were evaluated with CCK-8 assay.The result shows that 1 showed inhibitory activity against tumour cell U937 and MCF-7,and indicated that flavone sulfonate derivatives may be potential leads for further biological screenings and may generate drug-like molecules.

黄连中1个新型生物碱的研究

目的 研究黄连Coptis chinensis Franch中1个新型生物碱。方法 黄连75%乙醇提取物采用硅胶、ODS、semi-pre HPLC进行分离纯化,根据理化性质及波谱数据对鉴定所得化合物的结构。结果 从中分离得到3个化合物,分别鉴定为6-([1,3]dioxolo[4,5-g]isoquinoline-5-carbonyl)-2,3-dimethoxybenzoic acid ethyl ester(1)、oxohydrastinine(2)、pinoresinol(3)。结论 化合物1为新型苄基异喹啉生物碱。

Synthesis,crystal structure and properties of inorganic-organic hybrid polymers based on 8-hydroxylquinoline-5-sulfonic acid

Two new inorganic-organic hybrid polymers, Mn(QS)(H2O) (1) and Co(QS)(H2O)2 (2) (H2QS=8-hydroxylquinoline-5-sulfonic acid), based on 8-hydroxylquinoline-5-sulfonate ligand, have been synthesized under solvothermal conditions and their structures were solved by single-crystal X-ray diffraction analysis. Compound 1 is a three-dimensional open framework with rutile topology structure, and compound 2 is a three-dimensional supramolecular structure. These compounds were characterized by powder XRD, infrared spectroscopy, thermogravimetric analysis, fluorescence properties and magnetism properties.