乙尼二烯的双胞胎四化:与海米拉比尔-氨酸稳定的Au8Ag4集群化合物
Xiao-Li Pei1, Yang Yang, Zhen Lei
1State Key Lab of Physical Chemistry of Solid Surfaces, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, Fujian, People' s Republic of China.
Journal of the American Chemical Society
|April 16, 2013
概括
研究人员使用金银集群实现了史无前例的乙尼烯四化. 这种新的C-H激活反应产生了一个具有μ5-CCN(3-) 连接体的独特集群,显示出明亮的绿色发光.
科学领域:
- 无机化学 无机化学 有机化学
- 有机金属化学 有机金属化学
- 材料科学 材料科学 材料科学
背景情况:
- 金银集群正在成为C-H激活反应的多功能催化剂.
- 乙二是一种常见的溶剂和反应剂,但其C-H键通常不反应.
- 为小型有机分子开发新的协调模式对于促进催化和材料科学的发展至关重要.
研究的目的:
- 通过C-H激活实现了史无前例的亚丁的双四化.
- 为了合成和描述一种新型的金银集群,其中包含一个脱质的酸连接体.
- 调查新星团的协调化学和光物理特性.
主要方法:
- 在温和条件下,预先形成的氧-金 (I) -银 (I) 集群与银四二酸和酸乙烯的反应.
- 使用单晶X射线衍射,对由此产生的星团进行隔离和完整的描述.
- 用光谱分析来确定去质子化的乙尼特连接体的协调模式.
- 光发光谱学用于评估固态发射特性.
主要成果:
- 一个新的金银集群的成功合成, [(CCN) 2Au8Ag4 ((dppy) 8 ((CH3CN) 2)) ((BF4) 6通过C-H激活乙尼.
- 发现了一种独特的μ5-CCN(3-) 协调模式,其中三重deprotonated乙二甲连接物跨越多个金和银中心.
- 星团呈现出一个中心对称的结构,由由素连接体稳定的Au4Ag2图案组成.
- 这种新型星团在室温下的紫外线照射后,在固体状态下显示出明亮的绿色发光.
结论:
- 这项研究展示了一种新且高效的方法,用于使用Au (I) -Ag (I) 集群对乙尼特里尔进行双质四化.
- 史无前例的μ5-CCN(3-) 协调模式突显了这些多核集群的独特反应和协调能力.
- 合成集群的发光特性表明在材料科学和光电子学中的潜在应用.
相关概念视频
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02:27Preparation of Alkynes: Alkylation Reaction
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02:38Electrophilic Addition to Alkynes: Halogenation
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Halogenation is another class of electrophilic addition reactions where a halogen molecule gets added across a π bond. In alkynes, the presence of two π bonds allows for the addition of two equivalents of halogens (bromine or chlorine). The addition of the first halogen molecule forms a trans-dihaloalkene as the major product and the cis isomer as the minor product. Subsequent addition of the second equivalent yields the tetrahalide.
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Direct alkylation is not a suitable method for synthesizing amines because it produces polyalkylated products. Gabriel synthesis is the most preferred method to exclusively make primary amines. The method uses phthalimide, which contains a protected form of nitrogen that participates in alkylation only once to predominantly give primary amines.
Strong bases like NaOH or KOH deprotonate the phthalimide to form the corresponding anion, which acts as a nucleophile. Further, the anion attacks an...
Strong bases like NaOH or KOH deprotonate the phthalimide to form the corresponding anion, which acts as a nucleophile. Further, the anion attacks an...
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