2021年79卷3期封面及中英文目录

. 2021年79卷3期封面及中英文目录[J]. 化学学报, 2021, 79(3): 0-0.     

2021年79卷8期封面及中英文目录

. 2021年79卷8期封面及中英文目录[J]. 化学学报, 2021, 79(8): 0-0.     

2021年79卷12期封面及中英文目录

. 2021年79卷12期封面及中英文目录[J]. 化学学报, 2021, 79(12): 0-0.     

2021年79卷4期封面及中英文目录

. 2021年79卷4期封面及中英文目录[J]. 化学学报, 2021, 79(4): 0-0.     

2021年79卷10期封面及中英文目录

. 2021年79卷10期封面及中英文目录[J]. 化学学报, 2021, 79(10): 0-0.     

2021年79卷5期封面及中英文目录

. 2021年79卷5期封面及中英文目录[J]. 化学学报, 2021, 79(5): 0-0.     

2021年79卷2期封面及中英文目录

. 2021年79卷2期封面及中英文目录[J]. 化学学报, 2021, 79(2): 0-0.     

2021年79卷6期封面及中英文目录

. 2021年79卷6期封面及中英文目录[J]. 化学学报, 2021, 79(6): 0-0.     

2021年79卷7期封面及中英文目录

. 2021年79卷7期封面及中英文目录[J]. 化学学报, 2021, 79(7): 0-0.     

2021年79卷11期封面及中英文目录

. 2021年79卷11期封面及中英文目录[J]. 化学学报, 2021, 79(11): 0-0.     

2021年79卷9期封面及中英文目录

. 2021年79卷9期封面及中英文目录[J]. 化学学报, 2021, 79(9): 0-0.     

《The Code Breaker:Jennifer Doudna,Gene Editing,and the Future of the Human Race》一书评介

巩宇锈, 顾天航, 张伟贤. 《The Code Breaker: Jennifer Doudna, Gene Editing, and the Future of the Human Race》一书评介[J]. 化学学报, 2021, 79(8): 1082-1084.     

反相流动注射化学发光法测定单宁

在碱性介质中 ,单宁对高碘酸钾氧化鲁米诺的化学发光反应有较强的增敏作用 ,据此建立了反相流动注射化学发光测定单宁的新方法 ,并研究了最佳反应条件。该方法快速、准确、线性范围宽 ,测定单宁的检出限为 1 .1 2× 1 0 - 9g/ m L,方法的线性范围为 2 .0× 1 0 - 8～ 6 .0× 1 0 - 6 g/ m L,对于 4.0× 1 0 - 6 g/ m L单宁 1 0次测定的相对标准偏差为 0 .79%。应用于中药五倍子、诃子中单宁的测定 ,结果满意     

1-[2,3,5-三氮唑偶氮]-2-萘酚的合成及其与镉显色反应研究

合成了 1 -[2 ,3 ,5-三氮唑偶氮 ]-2 -萘酚 (简称 TNAN) ,研究了它与镉显色反应。结果表明 :在 Triton X-1 0 0存在下 ,p H7.0～ 8.7时 Cd( )与试剂形成 1∶ 2的红色络合物 ,ε=1 .79× 1 0 5L· mol- 1· cm- 1,镉浓度在 0～ 0 .8mg/ L范围内服从比耳定律。可用于水样和发样中徽量镉的测定     

催化动力学光度法测定痕量铜（Ⅱ）

研究了在磷酸介质中 ,铜 催化过氧化氢氧化偶氮胂Ⅰ褪色反应的适宜条件与影响因素 ,建立了动力学光度法测定痕量铜 的新方法。方法线性范围为 0～ 1 0 0 μg L ,检出限为 2 .79× 1 0 - 9g mL。该催化反应对Cu 为一级反应 ,表观活化能为 65 .6kJ mol,表观反应速率常数为 9.63× 1 0 - 4s- 1 。用于水样、电镀液和发样中铜 的测定 ,相对标准偏差为 0 .7%～ 4.7% ,标准加入回收率为 97.8%～ 1 0 4.2 %。     

双核Cu(II)-牛磺酸缩水杨醛席夫碱配合物的合成、晶体结构及生物活性

合成了双核铜配合物 [Cu(TSSB) (H2 O) ] 2 ·2H2 O (TSSB =牛磺酸缩水杨醛席夫碱 ) ,通过元素分析、红外光谱对配合物进行了表征 ,并利用X射线法测定其结构 .晶体属三斜晶系 ,空间群P1- ,其晶胞参数为 :a =0 .69613 ( 19)nm ,b =0 .93 0 7( 3 )nm ,c=1.0 43 9( 3 )nm ;α =10 8.796( 5 )° ,β =10 1.2 71( 5 )° ,γ =10 5 .617( 5 )° ,V =0 .5 869( 3 )nm3 ,Z =1,Dcald=1.849g/cm3 ,μ =2 .0 5 8mm-1,F( 0 0 0 ) =3 3 4,Gof =1.0 79,Δρ =3 79～ -4 0 6e·nm-3 .两个铜原子配位数各为五 ,处于变形四方锥的配位环境中 .并对配合物进行了的生物活性试验 ,结果表明 ,配合物抗菌活性与青霉素接近 ,肿瘤抑制率达 63 .5 % .半数致死量为 10 0 0mg/kg .有可能成为一种新的抗菌、抗肿瘤药物     

分子氧条件下Co-ETS-10和Co-AM-6催化苯乙烯氧化生成氧化苯乙烯和苯甲醛（英文）

Pristine ETS-10 and AM-6 and their Co2+-exchanged forms were prepared, and their catalytic activities toward the oxidation of styrene in oxygen atmosphere were studied in dimethylformamide. The catalysts were denoted as Co-E10-n(n = 0, 9, 26, 68, 81) and Co-A6-m(m = 0, 8, 23, 63, 79), where n and m denote the degree of Co2+ exchange. The products of the oxidation process were identified as styrene epoxide(E) and benzaldehyde(B). Both the pristine forms, ETS-10(Co-E10-0) and AM-6(Co-A6-0), and Co2+-exchanged forms displayed catalytic activities. With increasing n or m, the conversion, and hence the rate, increased. Specifically, the rates varied from 6.1 to 12.5 mmol·g-1·h-1with increasing n(Co-E10-n catalysts) and from 5.4 to 12.4 mmol·g-1·h-1 with increasing m(Co-A6-m catalysts). In contrast, the E/B ratio decreased with increasing n or m. More specifically,the E/B ratio decreased from 2.1 to 0.1 with increasing n from 0 to 81(Co-E10-n catalysts) and from 1.3 to 0.1 with increasing m from 0 to 79(Co-A6-m catalysts). Co-E10-9 displayed the highest E yield and Co-A6-79 generated the highest B yield. The highest turnover frequency obtained was 36.3 Co-1·h-1, which was the highest one obtained among those obtained for the Co2+-exchanged zeolites and mesoporous silica reference materials studied in this work.     

Co-ETS-10 and Co-AM-6 as active catalysts for the oxidation of styrene to styrene oxide and benzaldehyde using molecular oxygen

Pristine ETS-10 and AM-6 and their Co2+-exchanged forms were prepared, and their catalytic activi-ties toward the oxidation of styrene in oxygen atmosphere were studied in dimethylformamide. The catalysts were denoted as Co-E10-n (n=0, 9, 26, 68, 81) and Co-A6-m (m=0, 8, 23, 63, 79), where n and m denote the degree of Co2+exchange. The products of the oxidation process were identified as styrene epoxide (E) and benzaldehyde (B). Both the pristine forms, ETS-10 (Co-E10-0) and AM-6 (Co-A6-0), and Co2+-exchanged forms displayed catalytic activities. With increasing n or m, the con-version, and hence the rate, increased. Specifically, the rates varied from 6.1 to 12.5 mmol·g?1·h?1 with increasing n (Co-E10-n catalysts) and from 5.4 to 12.4 mmol·g?1·h?1 with increasing m (Co-A6-m catalysts). In contrast, the E/B ratio decreased with increasing n or m. More specifically, the E/B ratio decreased from 2.1 to 0.1 with increasing n from 0 to 81 (Co-E10-n catalysts) and from 1.3 to 0.1 with increasing m from 0 to 79 (Co-A6-m catalysts). Co-E10-9 displayed the highest E yield and Co-A6-79 generated the highest B yield. The highest turnover frequency obtained was 36.3 Co?1·h?1, which was the highest one obtained among those obtained for the Co2+-exchanged zeolites and mesoporous silica reference materials studied in this work.     

用碘离子选择性电极测定砷(Ⅲ)

砷是自然界中普遍存在而且对人体有毒的化学元素之一 ,目前分析砷的方法很多[1,2 ] ,本文用碘离子选择性电极间接测定砷 (Ⅲ )的含量 ,方法操作简单 ,结果可靠 ,检出限可达到 6.2 5× 1 0 -7ｍｏｌ·Ｌ-1。1　试验部分1 .1　主要仪器与试剂ｐＸＳ 2 1 5离子活度计(上海精科雷磁公司 )79 1型磁力加热搅拌器碘离子选择性电极 (江苏电分析仪器厂 )离子强度调节剂 :0 .5ｍｏｌ·Ｌ-1ＫＮＯ3 +0 1ｍｏｌ·Ｌ-1氯乙酸水为二次蒸馏水1 .2　试验方法取 5 0ｍｌ容量瓶若干个 ,分别加入 0 .5ｍｏｌ·Ｌ-1ＫＮＯ3 溶液 5ｍｌ,0 .1ｍｏｌ·Ｌ-1氯乙酸 2…     

粘度法测定部分水解聚丙烯酰胺的分子量

在 2 5℃、浓度为 1mol L的NaCl水溶液中 ,测定了聚合度 (DP)为 1 48× 10 3～ 3 79× 10 4的聚丙烯酰胺 (PAM)及其水解度 (h)在 0 %～ 70 %之间的部份水解聚丙烯酰胺 (HPAM)的特性粘度 ([η]) .根据聚电解质理论和Kowblansky的研究结果 ,建立了特性粘度 [η]与聚合度DP、水解度h之间的定量关系式 :[η]=0 1113DP0 83 2 9+0 9973DP0 753 1 (1- 0 81h1 2 )h .用该式处理方献数据 ,其平均误差为 13 74%