使用生物启发的Mo和W迪烯催化剂,选择性和高效地排毒含有H2O2的硫酸盐类似物
Beria Tanriover1, S M Supundrika Subasinghe1, Neal P Mankad1
1Department of Chemistry, University of Illinois Chicago, 845 W. Taylor St., Chicago, IL 60607 (USA).
概括
生物启发的和二醇催化剂有效地排毒硫 (SM) 研究类似物. 这些催化剂选择性地将SM氧化为良性硫氧化物,避免有毒硫的形成,提供了一个有前途的化学战药剂排毒策略.
科学领域:
- 催化剂是一种催化剂.
- 绿色化学 绿色化学
- 化学战剂 (CWA) 排毒 化学战剂 (CWA) 排毒
背景情况:
- 化学战剂 (CWA) 构成重大威胁,需要有效和选择性分解方法.
- 硫 (SM) 是一种大量储存的CWA;其通过氧化到硫氧化物 (SMO) 的排毒是首选的,但必须防止过度氧化到有毒的硫 (SMO2).
- 用于SM排毒的催化剂需要精确的调整,以实现没有过氧化的选择性氧化.
研究的目的:
- 开发高效和有选择性的催化剂,用于硫 (SM) 类型的排毒.
- 为了研究生物启发的 (Mo) 和 (W) 迪烯催化剂,用于SM氧化.
- 为了实现SM类型的选择性氧化到硫化物,避免过度氧化到硫.
主要方法:
- 使用了Mo和W狄醇烯复合物,[MO2(狄醇烯) 2 2-,受到氧转移酶酶的启发.
- 使用水性过氧化 (H2O2) 作为SM研究类型的氧化剂,二乙烯硫化 (CEES).
- 进行实验和计算研究以阐明反应机制并确定活性物种.
主要成果:
- 通过使用[WO2(mnt) ]2-和[MoO2(bdt) ]2-催化剂,实现了CEES到CEESO (硫氧化物) 的选择性氧化,而不会过度氧化到CEESO2 (硫).
- 证明了高效率,反应时间为5-15分钟,催化剂负载低至0.015mol%.
- 证实了催化剂的可重复使用性,而不会失去活性,并确定了在现场形成的n2-peroxo物种作为活性氧化剂.
结论:
- 生物启发的Mo和Wdithiolene催化剂对于选择性和高效的SM研究类型的排毒是有效的.
- 开发的催化系统为方便,廉价和选择性的末气排毒技术提供了一个有前途的方法.
- 这项研究强调了受酶启发的催化剂在解决关键安全和安全挑战方面的潜力.
相关概念视频
Preparation and Reactions of Thiols
7.5K
Thiols are prepared using the hydrosulfide anion as a nucleophile in a nucleophilic substitution reaction with alkyl halides. For instance, bromobutane reacts with sodium hydrosulfide to give butanethiol.
7.5K
Oxidation of Alkenes: Syn Dihydroxylation with Osmium Tetraoxide
12.6K
Alkenes are converted to 1,2-diols or glycols through a process called dihydroxylation. It involves the addition of two hydroxyl groups across the double bond with two different stereochemical approaches, namely anti and syn. Dihydroxylation using osmium tetroxide progresses with syn stereochemistry.
12.6K
Radical Substitution: Hydrogenolysis of Alkyl Halides with Tributyltin Hydride
2.2K
Radical substitution reactions can be used to remove functional groups from molecules. The hydrogenolysis of alkyl halides is one such reaction, where the weak Sn–H bond in tributyltin hydride reacts with alkyl halides to form alkanes. Here, the reagent Bu3SnH yields tributyltin halide as a byproduct.
The bonds formed in this reaction are stronger than the bonds broken, making it energetically favorable. The reaction follows a radical chain mechanism similar to radical halogenation reactions,...
The bonds formed in this reaction are stronger than the bonds broken, making it energetically favorable. The reaction follows a radical chain mechanism similar to radical halogenation reactions,...
2.2K
Reduction of Alkenes: Asymmetric Catalytic Hydrogenation
3.8K
Catalytic hydrogenation of alkenes is a transition-metal catalyzed reduction of the double bond using molecular hydrogen to give alkanes. The mode of hydrogen addition follows syn stereochemistry.
The metal catalyst used can be either heterogeneous or homogeneous. When hydrogenation of an alkene generates a chiral center, a pair of enantiomeric products is expected to form. However, an enantiomeric excess of one of the products can be facilitated using an enantioselective reaction or an...
The metal catalyst used can be either heterogeneous or homogeneous. When hydrogenation of an alkene generates a chiral center, a pair of enantiomeric products is expected to form. However, an enantiomeric excess of one of the products can be facilitated using an enantioselective reaction or an...
3.8K
Preparation and Reactions of Sulfides
5.7K
Sulfides are the sulfur analog of ethers, just as thiols are the sulfur analog of alcohol. Like ethers, sulfides also consist of two hydrocarbon groups bonded to the central sulfur atom. Depending upon the type of groups present, sulfides can be symmetrical or asymmetrical. Symmetrical sulfides can be prepared via an SN2 reaction between 2 equivalents of an alkyl halide and one equivalent of sodium sulfide.
5.7K
Oxidation of Alkenes: Syn Dihydroxylation with Potassium Permanganate
16.4K
Alkenes can be dihydroxylated using potassium permanganate. The method encompasses the reaction of an alkene with a cold, dilute solution of potassium permanganate under basic conditions to form a cis-diol along with a brown precipitate of manganese dioxide.
16.4K


