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1期封面及中英文目录

. 2021年79卷1期封面及中英文目录[J]. 化学学报, 2021, 79(1): 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.     

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     

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     

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     

配合物[Cu_2(TS)(H_2O)]·H_2O的自组装制备、晶体结构和电化学性质

利用单核配合物Na2 CuTS·H2 O在溶剂中的不稳定性质 ,自分解并重新组装得到了双核配合物 [Cu2 (TS)(H2 O) ]·H2 O .配合物为单斜晶系 ,空间群P2 1/C ,晶胞参数为a =0 .80 830 (16 )nm ,b =1.70 79(3)nm ,c =1.4 0 73(3)nm ,β =10 5 .0 8(3)° ,V =1.86 5 4 (6 )nm3 ,Z =4 ,最终一致性因子R =0 .0 6 4 4 .该分子结构为双核单元 ,金属原子通过两个酚氧原子桥联在一起 .结合晶体结构对配合物作了电化学研究     

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.     

高效液相色谱-电感耦合等离子体质谱法同时测定果汁饮品中砷、硒与铬元素的无机形态

建立了高效液相色谱(HPLC)与电感耦合等离子体质谱(ICP-MS)联用技术同时测定果汁饮品中Cr(Ⅵ)、Cr(Ⅲ)、As(Ⅲ)、As(Ⅴ)、Se(Ⅳ)和Se(Ⅵ) 6种元素无机形态的方法。样品经超声提取后,加入EDTA溶液,采用C8色谱柱分离,以0. 1 mmol/L四丁基氢氧化铵+0. 1 mmol/L乙酸铵+10%甲醇为流动相等度洗脱,ICP-MS测定。选用DRC模式消除干扰,保证了测定的准确性。上述6种元素无机形态的方法检出限分别为0. 34、0. 20、0. 50、0. 40、0. 82、0. 90μg/L,回收率为79. 5%~112%,相对标准偏差(RSD)小于5. 0%。应用该法检测实际样品,其中苹果汁未检出该6种形态;蓝莓汁检出Cr(Ⅲ)、Se(Ⅳ),含量分别为0. 007、0. 015 mg/kg;杂粮汁检出3种形态,含量为0. 008~0. 034 mg/kg。     

1570例学龄前儿童血铅水平调查

为了解顺德伦教学龄前儿童血铅水平及铅中毒发病情况 ,以便及时采取有效措施 ,根据整群分层随机抽样 ,检测了本区学龄前儿童血铅水平 ,并进行了流行病学分析。结果表明 ,本次调查学龄前儿童 1 5 70例 ,血铅水平为 (1 0 8 6± 79 8) μg/L ,儿童铅中毒患病率为 5 0 76% ;男童血铅水平及铅中毒患病率都高于女童 ,但无明显统计学差异 (P >0 0 5 ) ;年龄越大血铅水平相对越高 ,铅中毒患病率也越高 ,并存在明显差异 (P <0 0 1 )。提示顺德伦教学龄前儿童血铅水平及铅中毒患病率维持在较高水平 ,应及时采取有效措施 ,防治儿童铅中毒。