A series of ethyl 6-alkoxy-7-phenyl-4-hydroxy-3-quinolinecarboxylates were designed and synthesized.Their structures were confirmed by ~1H NMR,^(13)C NMR,IR and HRMS.The biological activities were primarily evaluated ...A series of ethyl 6-alkoxy-7-phenyl-4-hydroxy-3-quinolinecarboxylates were designed and synthesized.Their structures were confirmed by ~1H NMR,^(13)C NMR,IR and HRMS.The biological activities were primarily evaluated against Eimeria tenella according to Anticoccidial Index(ACI) method in vivo.The results showed that compounds 5e,5f and 5i exhibited anticoccidial activities against E.tenella at 27 mg kg^(-1).展开更多
The thermal behavior and kinetic parameters of the major exothermic decomposition reaction of the title compound in a temperature-programmed mode were studied by means of TG-DTG and DSC. The critical temperature of th...The thermal behavior and kinetic parameters of the major exothermic decomposition reaction of the title compound in a temperature-programmed mode were studied by means of TG-DTG and DSC. The critical temperature of thermal explosion was calculated. The effect of the title compound on the combustion characteristic of composition modifier double base propellant containing RDX was explored with a strand burner. The results show that the kinetic model function in differential forms, the apparent activation energy(E a) and the pre-exponential factor(A) of the major exothermic decomposition reaction are 3(1-α)[-ln(1-α)] 2/3, 190.56 kJ/mol and 10 13.39 s -1, respectively. The critical temperature of thermal explosion of the compound is 353.08 ℃. The kinetic equation of the major exothermic decomposition process of the title compound at 0.1 MPa could be expressed as dα/dT=10 14.65(1-α)[-ln(1-α)] 2/3 e -2.2920×104/T. As an auxiliary catalyzer, the title compound can help the main catalyzer of lead salt of 4-hydroxy-3,5-dinitropyridine to accelerate the burning rate and reduce the pressure exponent of RDX-CMDB propellant.展开更多
A study on catalytic dehydration of 4-hydroxy-3-hexanone （HH） to 4-hexen-3-one （HO） was carried out through conversion of HH over HZSM-5 zeolite catalyst in a fixed-bed reactor （FBR） operating under almospheric ...A study on catalytic dehydration of 4-hydroxy-3-hexanone （HH） to 4-hexen-3-one （HO） was carried out through conversion of HH over HZSM-5 zeolite catalyst in a fixed-bed reactor （FBR） operating under almospheric pressure. The test indicated a relatively high activity of the HZSM-5 zeolite capable of achieving a HH conversion of 99.2% and a HO yield of 83.5%. Catalyst deactivation could be prevented by increasing the reaction temperature by 10 ＂C for every 20 h and adding 2.0% of piperidine in the feed. A catalyst stability test （for 100 h） in FBR showed that the catalyst was active even after 100 h of time-on-stream with HH conversion remaining at 99.2% and HO yield still reaching over 83.5%. Regenera- tion experiment showed that the regenerated catalyst demonstrated a catalytic performance comparable to the fresh one.展开更多
The title compound [2-hydroxy-5-（4-hydroxy-3-phenyliminomethyl-benzyl）-benzylidene]-phenyl-amine （C27H22N2O2, Mr = 406.47） was synthesized by 5,5′-methylene-bissalicylal- dehyde with aminobenezene, and its crysta...The title compound [2-hydroxy-5-（4-hydroxy-3-phenyliminomethyl-benzyl）-benzylidene]-phenyl-amine （C27H22N2O2, Mr = 406.47） was synthesized by 5,5′-methylene-bissalicylal- dehyde with aminobenezene, and its crystal structure was determined by single-crystal X-ray diffraction. The crystal belongs to the monoclinic system, space group C2/c with a = 4.4026（6）, b = 1.501（13）, c = 0.95818（12） nm, β = 90.868（2）°, V= 4.2813（9） nm^3, Z= 8, Dc= 1.292 g/cm^3,μ = 0.010, F（000） = 1744, R = 0.0576 and wR = 0.1450 for 3766 observed reflections with I 〉 2σ（I）. X-ray analysis reveals that the molecule has a pair of intramolecular OH…N hydrogen bonds.展开更多
[目的]3-(3′,4′-次甲二氧苯基)-N-正丙基丙烯酰胺是具有广谱抑菌活性的化合物,将其研制成优良环保剂型悬浮剂,可为实现田间应用提供技术依据。[方法]采用湿法研磨制备了12种不同配方的悬浮剂,通过质量指标检测确定最佳配方,测定其表...[目的]3-(3′,4′-次甲二氧苯基)-N-正丙基丙烯酰胺是具有广谱抑菌活性的化合物,将其研制成优良环保剂型悬浮剂,可为实现田间应用提供技术依据。[方法]采用湿法研磨制备了12种不同配方的悬浮剂,通过质量指标检测确定最佳配方,测定其表面张力及其在黄瓜叶面的动态接触角,并开展了防治黄瓜白粉病田间药效试验。[结果]最佳配方为3-(3′,4′-次甲二氧苯基)-N-正丙基丙烯酰胺40%(折百)、S043%、D4252%、W071%、乙二醇3%、硅酸镁铝0.4%、黄原胶0.12%、B150.12%、消泡剂X600.3%、水补足。此悬浮剂在有效成分0.27 g a.i./L时的表面张力以及在黄瓜叶面的动态接触角均小于对照药剂40%苯醚甲环唑SC,表明其具有良好的润湿性能。在有效成分0.27 g a.i./L下的防效为88.38%,与对照药剂25%嘧菌酯SC 0.20 g a.i./L相当,且对黄瓜安全。[结论]制备悬浮剂为类白色均匀悬浮液,流动性好,粒径合格,悬浮率稳定在98.5%左右,pH为4.09,黏度为452 mPa·s,入水分散性合格,热储、低温及冻融稳定性良好,未出现沉淀,各项指标均达标,对黄瓜白粉病防效优良,具有良好的开发应用前景。展开更多
本研究基于自行搭建的5 k W旋流预混火焰实验台,开展了轴向空气分级方式下CH_(4)/NH_(3)旋流预混火焰的实验测试,重点考察了分级风比例、分级风高度及分级风喷口数目对CH_(4)/NH_(3)旋流预混火焰燃烧及排放特性的影响。结果表明:随着NH_...本研究基于自行搭建的5 k W旋流预混火焰实验台,开展了轴向空气分级方式下CH_(4)/NH_(3)旋流预混火焰的实验测试,重点考察了分级风比例、分级风高度及分级风喷口数目对CH_(4)/NH_(3)旋流预混火焰燃烧及排放特性的影响。结果表明:随着NH_(3)占比的增大,火焰高度变长,燃烧室出口的NO排放量呈先增大后减小的趋势且在NH_(3)占比为50%达到峰值;在50%掺氨工况下采用轴向空气分级使一级燃烧室处于富燃状态可以有效降低NO的排放,其中分级风的最佳比例范围是30%~50%(当量比1.21~1.70),且随着分级风高度的增大呈下降趋势;此外,在最佳分级风比例和高度条件下(分级风高度80 mm、占比30%),增加分级风的喷口数目可减轻分级风碰撞对上游主燃区富燃状态的影响,使NO排放进一步降低。展开更多
在强光照射下,CdS量子点易发生光腐蚀现象,通过金属掺杂和复合的方式可以提高CdS的光催化性能和光稳定性。采用水热法合成了Zn掺杂CdS/g-C_(3)N_(4)复合纳米材料(Zn-CdS/g-C_(3)N_(4))。利用扫描电子显微镜(SEM)、透射电子显微镜(TEM)、...在强光照射下,CdS量子点易发生光腐蚀现象,通过金属掺杂和复合的方式可以提高CdS的光催化性能和光稳定性。采用水热法合成了Zn掺杂CdS/g-C_(3)N_(4)复合纳米材料(Zn-CdS/g-C_(3)N_(4))。利用扫描电子显微镜(SEM)、透射电子显微镜(TEM)、X射线衍射(XRD)、X射线光电子能谱(XPS)和傅里叶变换红外光谱(FT-IR)等手段对Zn-CdS/g-C_(3)N_(4)复合材料的形貌、结构和组成等进行了表征。结果表明,Zn-CdS纳米颗粒附着在g-C_(3)N_(4)表面上,从而形成Zn-CdS/g-C_(3)N_(4)复合材料,且复合后材料带隙减小,光生电子-空穴复合率降低。在500 W Xe灯照射下,研究了Zn-CdS/g-C_(3)N_(4)对罗丹明B(RhB)的光催化降解性能。在最优条件下,光照40 min后,所制备的Zn-CdS/g-C_(3)N_(4)对RhB的光催化降解效率达99%。此外,所合成的Zn-CdS/g-C_(3)N_(4)复合材料光稳定性较高、可再生性好。这归因于Zn和Cd的协同作用以及与g-C_(3)N_(4)的复合,促进了光生载流子的分离和转移。展开更多
基金support from the National Science Foundation of China(No.20372052)
文摘A series of ethyl 6-alkoxy-7-phenyl-4-hydroxy-3-quinolinecarboxylates were designed and synthesized.Their structures were confirmed by ~1H NMR,^(13)C NMR,IR and HRMS.The biological activities were primarily evaluated against Eimeria tenella according to Anticoccidial Index(ACI) method in vivo.The results showed that compounds 5e,5f and 5i exhibited anticoccidial activities against E.tenella at 27 mg kg^(-1).
文摘The thermal behavior and kinetic parameters of the major exothermic decomposition reaction of the title compound in a temperature-programmed mode were studied by means of TG-DTG and DSC. The critical temperature of thermal explosion was calculated. The effect of the title compound on the combustion characteristic of composition modifier double base propellant containing RDX was explored with a strand burner. The results show that the kinetic model function in differential forms, the apparent activation energy(E a) and the pre-exponential factor(A) of the major exothermic decomposition reaction are 3(1-α)[-ln(1-α)] 2/3, 190.56 kJ/mol and 10 13.39 s -1, respectively. The critical temperature of thermal explosion of the compound is 353.08 ℃. The kinetic equation of the major exothermic decomposition process of the title compound at 0.1 MPa could be expressed as dα/dT=10 14.65(1-α)[-ln(1-α)] 2/3 e -2.2920×104/T. As an auxiliary catalyzer, the title compound can help the main catalyzer of lead salt of 4-hydroxy-3,5-dinitropyridine to accelerate the burning rate and reduce the pressure exponent of RDX-CMDB propellant.
基金supported by the Science and Technology Planning Program of Tianjin(Project No.12ZXCXGX21900)
文摘A study on catalytic dehydration of 4-hydroxy-3-hexanone （HH） to 4-hexen-3-one （HO） was carried out through conversion of HH over HZSM-5 zeolite catalyst in a fixed-bed reactor （FBR） operating under almospheric pressure. The test indicated a relatively high activity of the HZSM-5 zeolite capable of achieving a HH conversion of 99.2% and a HO yield of 83.5%. Catalyst deactivation could be prevented by increasing the reaction temperature by 10 ＂C for every 20 h and adding 2.0% of piperidine in the feed. A catalyst stability test （for 100 h） in FBR showed that the catalyst was active even after 100 h of time-on-stream with HH conversion remaining at 99.2% and HO yield still reaching over 83.5%. Regenera- tion experiment showed that the regenerated catalyst demonstrated a catalytic performance comparable to the fresh one.
基金supported by the Project for Distinguished Young Scholars from Hubei Provincial Department of Education (No. Q20082601)
文摘The title compound [2-hydroxy-5-（4-hydroxy-3-phenyliminomethyl-benzyl）-benzylidene]-phenyl-amine （C27H22N2O2, Mr = 406.47） was synthesized by 5,5′-methylene-bissalicylal- dehyde with aminobenezene, and its crystal structure was determined by single-crystal X-ray diffraction. The crystal belongs to the monoclinic system, space group C2/c with a = 4.4026（6）, b = 1.501（13）, c = 0.95818（12） nm, β = 90.868（2）°, V= 4.2813（9） nm^3, Z= 8, Dc= 1.292 g/cm^3,μ = 0.010, F（000） = 1744, R = 0.0576 and wR = 0.1450 for 3766 observed reflections with I 〉 2σ（I）. X-ray analysis reveals that the molecule has a pair of intramolecular OH…N hydrogen bonds.
文摘[目的]3-(3′,4′-次甲二氧苯基)-N-正丙基丙烯酰胺是具有广谱抑菌活性的化合物,将其研制成优良环保剂型悬浮剂,可为实现田间应用提供技术依据。[方法]采用湿法研磨制备了12种不同配方的悬浮剂,通过质量指标检测确定最佳配方,测定其表面张力及其在黄瓜叶面的动态接触角,并开展了防治黄瓜白粉病田间药效试验。[结果]最佳配方为3-(3′,4′-次甲二氧苯基)-N-正丙基丙烯酰胺40%(折百)、S043%、D4252%、W071%、乙二醇3%、硅酸镁铝0.4%、黄原胶0.12%、B150.12%、消泡剂X600.3%、水补足。此悬浮剂在有效成分0.27 g a.i./L时的表面张力以及在黄瓜叶面的动态接触角均小于对照药剂40%苯醚甲环唑SC,表明其具有良好的润湿性能。在有效成分0.27 g a.i./L下的防效为88.38%,与对照药剂25%嘧菌酯SC 0.20 g a.i./L相当,且对黄瓜安全。[结论]制备悬浮剂为类白色均匀悬浮液,流动性好,粒径合格,悬浮率稳定在98.5%左右,pH为4.09,黏度为452 mPa·s,入水分散性合格,热储、低温及冻融稳定性良好,未出现沉淀,各项指标均达标,对黄瓜白粉病防效优良,具有良好的开发应用前景。
文摘本研究基于自行搭建的5 k W旋流预混火焰实验台,开展了轴向空气分级方式下CH_(4)/NH_(3)旋流预混火焰的实验测试,重点考察了分级风比例、分级风高度及分级风喷口数目对CH_(4)/NH_(3)旋流预混火焰燃烧及排放特性的影响。结果表明:随着NH_(3)占比的增大,火焰高度变长,燃烧室出口的NO排放量呈先增大后减小的趋势且在NH_(3)占比为50%达到峰值;在50%掺氨工况下采用轴向空气分级使一级燃烧室处于富燃状态可以有效降低NO的排放,其中分级风的最佳比例范围是30%~50%(当量比1.21~1.70),且随着分级风高度的增大呈下降趋势;此外,在最佳分级风比例和高度条件下(分级风高度80 mm、占比30%),增加分级风的喷口数目可减轻分级风碰撞对上游主燃区富燃状态的影响,使NO排放进一步降低。
文摘在强光照射下,CdS量子点易发生光腐蚀现象,通过金属掺杂和复合的方式可以提高CdS的光催化性能和光稳定性。采用水热法合成了Zn掺杂CdS/g-C_(3)N_(4)复合纳米材料(Zn-CdS/g-C_(3)N_(4))。利用扫描电子显微镜(SEM)、透射电子显微镜(TEM)、X射线衍射(XRD)、X射线光电子能谱(XPS)和傅里叶变换红外光谱(FT-IR)等手段对Zn-CdS/g-C_(3)N_(4)复合材料的形貌、结构和组成等进行了表征。结果表明,Zn-CdS纳米颗粒附着在g-C_(3)N_(4)表面上,从而形成Zn-CdS/g-C_(3)N_(4)复合材料,且复合后材料带隙减小,光生电子-空穴复合率降低。在500 W Xe灯照射下,研究了Zn-CdS/g-C_(3)N_(4)对罗丹明B(RhB)的光催化降解性能。在最优条件下,光照40 min后,所制备的Zn-CdS/g-C_(3)N_(4)对RhB的光催化降解效率达99%。此外,所合成的Zn-CdS/g-C_(3)N_(4)复合材料光稳定性较高、可再生性好。这归因于Zn和Cd的协同作用以及与g-C_(3)N_(4)的复合,促进了光生载流子的分离和转移。
