采用Fe 2 O 3-K 2 O氧化物催化剂,针对二乙苯脱氢制二乙烯基苯过程进行反应特性研究及工艺参数优化,对二乙苯脱氢反应产物分布的影响因素进行分析。XRD测试结果表明,催化剂体相中明显含有K 2 Fe 10 O 16和K 2 Fe 22 O 34两种多铁酸钾晶...采用Fe 2 O 3-K 2 O氧化物催化剂,针对二乙苯脱氢制二乙烯基苯过程进行反应特性研究及工艺参数优化,对二乙苯脱氢反应产物分布的影响因素进行分析。XRD测试结果表明,催化剂体相中明显含有K 2 Fe 10 O 16和K 2 Fe 22 O 34两种多铁酸钾晶相时,催化剂的活性较好。工艺条件试验表明,提高反应温度和水与二乙苯质量比,可以提高二乙苯转化率,降低产物中单双烯比值,提高二乙烯基苯产物的间对比。分析了反应过程中异构体的影响,发现间位和对位二乙苯总脱氢的能力差异不大,且反应过程中不出现异构化转变,但以间二乙苯为原料时,其脱氢容易停留在第一步获得乙基乙烯苯,而对位二乙苯的脱氢较容易获得二乙烯基苯。展开更多
Caffeic acid phenethyl ester (CAPE) and sixteen substituted cinnamic acid phenethyl esters were prepared via conventional procedures in order to test their in vitro anticancer activities by either MTT assay or SRB...Caffeic acid phenethyl ester (CAPE) and sixteen substituted cinnamic acid phenethyl esters were prepared via conventional procedures in order to test their in vitro anticancer activities by either MTT assay or SRB assay on six different human cancer cell lines. The results indicated that in the concentration of 10 μmol·L -1 the lead compound CAPE possessed anticancer activities against human HL 60, Bel 7402, and Hela cell lines, and two other compounds possessed potent anticancer activities against Bel 7402 and Hela cell lines.展开更多
Different-sized hollow SiO2 spheres of 249–1348 nm in diameter were successfully prepared by using Na2SiO3 as the precursor and using polystyrene and polystyrene-methyl acrylic acid latexes as the templates. The diam...Different-sized hollow SiO2 spheres of 249–1348 nm in diameter were successfully prepared by using Na2SiO3 as the precursor and using polystyrene and polystyrene-methyl acrylic acid latexes as the templates. The diameter and shell thickness of the hollow SiO2 spheres increase with increasing the latex template diameter at a given mass ratio of SiO2 to latex template. The diameter and shell thickness of the hollow SiO2 spheres also increase with increasing the mass ratios of SiO2 to latex template. The presence of carboxylic acid groups on the surfaces of polystyrene-methyl acrylic acid latex templates favors the formation of dense and uniform SiO2 shells. The hollow SiO2 sphere is constructed by mesoporous shell with large specific surface area. When glyphosate is used as a release model chemical, glyphosate release rate is tuned by varying the shell thickness.展开更多
Acetyl crosslinked polystyrene (EPS) and crosslinked bromoacetyl polystyrene (BEPS)beads were synthesized by Fridel-Crafts acetylation of polystyrene (PS) and bromination of EPS respectively. FTIR, XPS, and TG-TDG wer...Acetyl crosslinked polystyrene (EPS) and crosslinked bromoacetyl polystyrene (BEPS)beads were synthesized by Fridel-Crafts acetylation of polystyrene (PS) and bromination of EPS respectively. FTIR, XPS, and TG-TDG were employed to characterize their structures. The results revealed there are two types of bromine in the BEPS molecule. One is in the main chain of polystyrene and the other is in the acetyl. The results of TG-DTG showed that the rates of loss weight of PS, EPS, and BEPS were 92.7%, 92.2%, and 81.3% among the 300 ℃～500 ℃; 7.3%, 7.8%, and 18. 7% in 594 ℃, 660 ℃, and 584.8 ℃, respectively.展开更多
The crystal structure of the title compound C16H18NO2+·C7H7SO3-·2H2O, (C23H29NSO7, Mr=463.53) has been determined by single-crystal X-ray diffraction analysis. The crystal belongs to the monoclinic system wi...The crystal structure of the title compound C16H18NO2+·C7H7SO3-·2H2O, (C23H29NSO7, Mr=463.53) has been determined by single-crystal X-ray diffraction analysis. The crystal belongs to the monoclinic system with space group P21/n, a=8.101(1), b=8.958(2), c=33.281(5)?,β= 94.910(1)(, V=2406.3(7)?3, Z=4, Dc=1.279g/cm3, μ=0.176mm-1, F(000)=984, final R=0.0409, and Rw=0.0860 for 4401 independent reflections. The result shows that in the crystal structure of the title compound the planar cations have two configurations with equal occupation ratio and are antiparally packed through π…π interactions. Similar packing energies in A and B are probably the main factor that leads to the disorder structure.展开更多
Two kinds of St/DVB copolymer beeds containing (1 - pyrenyl) formyl and(1 -pyrenyl) methyl groups respectively have been synthesized by both functionalization and copolymerization. The fluorescence spectra of the swo...Two kinds of St/DVB copolymer beeds containing (1 - pyrenyl) formyl and(1 -pyrenyl) methyl groups respectively have been synthesized by both functionalization and copolymerization. The fluorescence spectra of the swollen polymers synthesized are similar in shape to those of the corresponding model compounds, whilethe intensity ratio of excimer to monomer shows clear dependence on the contents ofthe pyrene groups.展开更多
In this work, DSC and SEM studies indicate that ion-ligand interaction can be utilized to enhance the interaction of poly (styrene-block-2-vinyl pyridine)[P (S-b-2VP)] and polyethylene based ionomer (Surlyn). The comp...In this work, DSC and SEM studies indicate that ion-ligand interaction can be utilized to enhance the interaction of poly (styrene-block-2-vinyl pyridine)[P (S-b-2VP)] and polyethylene based ionomer (Surlyn). The compatibility for this blending system can be improved by this special interaction and 20/80 wt is the optimum blending composition with good compatibility. FTIR results further certify that strong interactions exist in the blending system.展开更多
The reactiving ratios of vinyl acetate (VAc) and divinyl benzene (DVB) werecalculated from the Q and e values. The possibility of the copolymerization of thesetwo monomers was predicted and the copolymerization was ca...The reactiving ratios of vinyl acetate (VAc) and divinyl benzene (DVB) werecalculated from the Q and e values. The possibility of the copolymerization of thesetwo monomers was predicted and the copolymerization was carried out by-sin pensionpolymerization technique in the presence of pore producing agent (toluene andgasoline). The relative ratio of acetoxy group and benzene ring in the copolymer weremonitored by IR measurement during the polymerization. The variation of poreproperties, such as specific surface area, porosity and average pore diameter withpolymerization time were determined The copolymers at various polymerization timewere alcoholyzed and thus the variation of the hydroxyl group content withpolymerization time was studied.展开更多
The aim of this study was to develop a novel pharmaceutical excipient:an anion exchange resin.Initially,polystyrenedivinylbenzene(PS-DVB)microspheres were synthesized via suspension polymerization.Subsequently,these m...The aim of this study was to develop a novel pharmaceutical excipient:an anion exchange resin.Initially,polystyrenedivinylbenzene(PS-DVB)microspheres were synthesized via suspension polymerization.Subsequently,these microspheres served as a substrate for chloromethylation using methanol,formaldehyde,and chlorosulfonic acid.By optimizing the reaction conditions,the chloromethylated microspheres were characterized using infrared spectroscopy,scanning electron microscopy,and the Mohr method.Under optimal reaction conditions,the resulting products exhibited uniformity and spherical morphology,with an average particle size of approximately 190μm.The PS-DVB microspheres effectively incorporated chloromethyl groups,as evidenced by a chlorine content of 14.67%.Scanning electron microscopy analysis indicated that the appearance of the microspheres remained largely unchanged post-reaction.Overall,the research findings demonstrated the successful preparation of the anion exchange resin.Characterization and quality assessment confirmed that the ion exchange resin met the required standards.展开更多
Many technological applications require templates with nanoscale patterns.Block copolymer self-assembly is a method of choice for obtaining a large variety of such patterns,with greatest flexibility achieved when comb...Many technological applications require templates with nanoscale patterns.Block copolymer self-assembly is a method of choice for obtaining a large variety of such patterns,with greatest flexibility achieved when combined with a supramolecular approach.One of the ways to fabricate block copolymer templates is the Langmuir-Blodgett (LB) technique.Here,we briefly summarize recent work with LB films of polystyrene-poly(4-vinyl pyridine) (PS-P4VP) mixed with 3-n-pentade cylphenol (PDP),illustrating the different types of patterns possible and the principles governing them.One interesting pattern that can be easily achieved with this system is the so-called "nanostrand network",which,when used as a template for gold deposition,can produce double striped lines of gold.Here,we show how this pattern can be modified by acetone swelling to give rise to gold monolayer ribbons with internal structure.The results also suggest new insights into the early stages of morphology formation at the air/water interface.展开更多
文摘采用Fe 2 O 3-K 2 O氧化物催化剂,针对二乙苯脱氢制二乙烯基苯过程进行反应特性研究及工艺参数优化,对二乙苯脱氢反应产物分布的影响因素进行分析。XRD测试结果表明,催化剂体相中明显含有K 2 Fe 10 O 16和K 2 Fe 22 O 34两种多铁酸钾晶相时,催化剂的活性较好。工艺条件试验表明,提高反应温度和水与二乙苯质量比,可以提高二乙苯转化率,降低产物中单双烯比值,提高二乙烯基苯产物的间对比。分析了反应过程中异构体的影响,发现间位和对位二乙苯总脱氢的能力差异不大,且反应过程中不出现异构化转变,但以间二乙苯为原料时,其脱氢容易停留在第一步获得乙基乙烯苯,而对位二乙苯的脱氢较容易获得二乙烯基苯。
文摘Caffeic acid phenethyl ester (CAPE) and sixteen substituted cinnamic acid phenethyl esters were prepared via conventional procedures in order to test their in vitro anticancer activities by either MTT assay or SRB assay on six different human cancer cell lines. The results indicated that in the concentration of 10 μmol·L -1 the lead compound CAPE possessed anticancer activities against human HL 60, Bel 7402, and Hela cell lines, and two other compounds possessed potent anticancer activities against Bel 7402 and Hela cell lines.
基金Projects (11KJB530002, CX10B-259Z) supported by Research Funds from Jiangsu Provincial Department of Education, ChinaProject (10zxfk35) supported by Sichuan Province Nonmetallic Composites and Functional Materials Key Laboratory Project, China
文摘Different-sized hollow SiO2 spheres of 249–1348 nm in diameter were successfully prepared by using Na2SiO3 as the precursor and using polystyrene and polystyrene-methyl acrylic acid latexes as the templates. The diameter and shell thickness of the hollow SiO2 spheres increase with increasing the latex template diameter at a given mass ratio of SiO2 to latex template. The diameter and shell thickness of the hollow SiO2 spheres also increase with increasing the mass ratios of SiO2 to latex template. The presence of carboxylic acid groups on the surfaces of polystyrene-methyl acrylic acid latex templates favors the formation of dense and uniform SiO2 shells. The hollow SiO2 sphere is constructed by mesoporous shell with large specific surface area. When glyphosate is used as a release model chemical, glyphosate release rate is tuned by varying the shell thickness.
基金National Natural Science Foundation of China (No.29906008) and Nature Science Foundation of Shandong Province (No.Q99B15).
文摘Acetyl crosslinked polystyrene (EPS) and crosslinked bromoacetyl polystyrene (BEPS)beads were synthesized by Fridel-Crafts acetylation of polystyrene (PS) and bromination of EPS respectively. FTIR, XPS, and TG-TDG were employed to characterize their structures. The results revealed there are two types of bromine in the BEPS molecule. One is in the main chain of polystyrene and the other is in the acetyl. The results of TG-DTG showed that the rates of loss weight of PS, EPS, and BEPS were 92.7%, 92.2%, and 81.3% among the 300 ℃～500 ℃; 7.3%, 7.8%, and 18. 7% in 594 ℃, 660 ℃, and 584.8 ℃, respectively.
文摘The crystal structure of the title compound C16H18NO2+·C7H7SO3-·2H2O, (C23H29NSO7, Mr=463.53) has been determined by single-crystal X-ray diffraction analysis. The crystal belongs to the monoclinic system with space group P21/n, a=8.101(1), b=8.958(2), c=33.281(5)?,β= 94.910(1)(, V=2406.3(7)?3, Z=4, Dc=1.279g/cm3, μ=0.176mm-1, F(000)=984, final R=0.0409, and Rw=0.0860 for 4401 independent reflections. The result shows that in the crystal structure of the title compound the planar cations have two configurations with equal occupation ratio and are antiparally packed through π…π interactions. Similar packing energies in A and B are probably the main factor that leads to the disorder structure.
文摘Two kinds of St/DVB copolymer beeds containing (1 - pyrenyl) formyl and(1 -pyrenyl) methyl groups respectively have been synthesized by both functionalization and copolymerization. The fluorescence spectra of the swollen polymers synthesized are similar in shape to those of the corresponding model compounds, whilethe intensity ratio of excimer to monomer shows clear dependence on the contents ofthe pyrene groups.
文摘In this work, DSC and SEM studies indicate that ion-ligand interaction can be utilized to enhance the interaction of poly (styrene-block-2-vinyl pyridine)[P (S-b-2VP)] and polyethylene based ionomer (Surlyn). The compatibility for this blending system can be improved by this special interaction and 20/80 wt is the optimum blending composition with good compatibility. FTIR results further certify that strong interactions exist in the blending system.
文摘The reactiving ratios of vinyl acetate (VAc) and divinyl benzene (DVB) werecalculated from the Q and e values. The possibility of the copolymerization of thesetwo monomers was predicted and the copolymerization was carried out by-sin pensionpolymerization technique in the presence of pore producing agent (toluene andgasoline). The relative ratio of acetoxy group and benzene ring in the copolymer weremonitored by IR measurement during the polymerization. The variation of poreproperties, such as specific surface area, porosity and average pore diameter withpolymerization time were determined The copolymers at various polymerization timewere alcoholyzed and thus the variation of the hydroxyl group content withpolymerization time was studied.
基金2023 Nantong Jianghai Talents Project,the Nantong Social Livelihood Science and Technology Plan for 2023the 2022 New Drugs and Platform Enhancement Project of the Yangtze Delta Drug Advanced Research Institute.Additionally,support was p rovided by the Zhenjiang Science and Technology Project(Grant No.SH2020048)+2 种基金the China Postdoctoral Science Foundation(Grant No.2020M681532)the Jiangsu Planned Projects for Postdoctoral Research Funds(Grant No.2020Z209)the Natural Science Research Projects of Universities in Jiangsu Province(Grant No.20KJD350001).
文摘The aim of this study was to develop a novel pharmaceutical excipient:an anion exchange resin.Initially,polystyrenedivinylbenzene(PS-DVB)microspheres were synthesized via suspension polymerization.Subsequently,these microspheres served as a substrate for chloromethylation using methanol,formaldehyde,and chlorosulfonic acid.By optimizing the reaction conditions,the chloromethylated microspheres were characterized using infrared spectroscopy,scanning electron microscopy,and the Mohr method.Under optimal reaction conditions,the resulting products exhibited uniformity and spherical morphology,with an average particle size of approximately 190μm.The PS-DVB microspheres effectively incorporated chloromethyl groups,as evidenced by a chlorine content of 14.67%.Scanning electron microscopy analysis indicated that the appearance of the microspheres remained largely unchanged post-reaction.Overall,the research findings demonstrated the successful preparation of the anion exchange resin.Characterization and quality assessment confirmed that the ion exchange resin met the required standards.
基金supported by the Natural Sciences and Engineering Council of Canada (NSERC)the Fonds de recherches du Québec-Nature et Technologies (FQRNT)
文摘Many technological applications require templates with nanoscale patterns.Block copolymer self-assembly is a method of choice for obtaining a large variety of such patterns,with greatest flexibility achieved when combined with a supramolecular approach.One of the ways to fabricate block copolymer templates is the Langmuir-Blodgett (LB) technique.Here,we briefly summarize recent work with LB films of polystyrene-poly(4-vinyl pyridine) (PS-P4VP) mixed with 3-n-pentade cylphenol (PDP),illustrating the different types of patterns possible and the principles governing them.One interesting pattern that can be easily achieved with this system is the so-called "nanostrand network",which,when used as a template for gold deposition,can produce double striped lines of gold.Here,we show how this pattern can be modified by acetone swelling to give rise to gold monolayer ribbons with internal structure.The results also suggest new insights into the early stages of morphology formation at the air/water interface.
