Boroxine: A novel approach to the phosphorus trifluoride-borane system
作者:Lawrence Barton
DOI:10.1016/0022-1902(68)80339-2
日期:1968.8
The gas phase reaction between boroxine and phosphorus trifluoride has been studied and shown to proceed as: B3O3H3(g) + PF3(g) → BH3PF3(g) + B2O3(s). Rate date obtained using an i.r. absorbance technique show a first order dependence on boroxine.
Matrix isolation study of excimer laser-induced photooxidation processes
作者:Bruce S. Ault
DOI:10.1016/0022-2860(90)80002-2
日期:1990.5
employed in different experiments for reaction with the photolytically produced O atoms. Distinct products were observed for each system, and in each case the oxidation reaction was quenched by the matrix prior to formation of the final combustion product for the system in question. However, the exothermicity of the reaction in each case was sufficiently great that the probable initial reaction product
摘要 含有 N 2 O 或 O 2 的基质的准分子激光辐照导致 O 原子的产生,并随后与第二种反应物发生反应。在不同的实验中使用小烃和乙硼烷与光解产生的 O 原子反应。对于每个系统都观察到不同的产物,并且在每种情况下,氧化反应在所讨论系统的最终燃烧产物形成之前被基质淬灭。然而,在每种情况下,反应的放热都足够大,以至于可能的初始反应产物,例如 O 与丙炔反应中的亚乙基,无法稳定,而是通过分解或氢转移进一步反应。在 O + B 2 H 6 的反应中,HBO 被确定为早期反应产物,
Continuous Photo-Oxidation in a Vortex Reactor: Efficient Operations Using Air Drawn from the Laboratory
作者:Darren S. Lee、Zacharias Amara、Charlotte A. Clark、Zeyuan Xu、Bruce Kakimpa、Herve P. Morvan、Stephen J. Pickering、Martyn Poliakoff、Michael W. George
DOI:10.1021/acs.oprd.7b00153
日期:2017.7.21
We report the construction and use of a vortexreactor which uses a rapidly rotating cylinder to generate Taylor vortices for continuousflow thermal and photochemical reactions. The reactor is designed to operate under conditions required for vortex generation. The flow pattern of the vortices has been represented using computational fluid dynamics, and the presence of the vortices can be easily visualized
我们报告了涡旋反应器的构造和使用,该涡旋反应器使用一个快速旋转的圆柱体来产生泰勒涡旋,以进行连续流动的热和光化学反应。反应器设计为在产生涡旋所需的条件下运行。旋涡的流动模式已经使用计算流体动力学来表示,并且旋涡的存在可以通过观察反应器内的气泡流而容易地可视化。该方法为与添加气体的反应提供了某些优势。对于与氧气的反应,该反应器提供了传统设置的替代选择,因为它可以有效地从实验室吸入空气,而无需专门用氧气加压。由涡流产生的快速混合使得能够在气相和液相之间进行快速的质量传递,从而允许气体的高效溶解。该反应器已应用于涉及单线态氧的几种光化学反应(1 O 2),包括α-萜品烯和糠醇的光氧化作用以及苯基硼酸的光脱氧作用。事实证明,圆筒的旋转速度是反应效率的关键,在操作中,我们发现以4000 rpm的速度吸入的空气最高。该反应器也已成功地用于合成青蒿素,一种有效的抗疟化合物。在涡旋中以一个单一过程进行了三步合成,该过程包括由二氢青蒿酸与1
Excimer-laser-induced oxidation of diborane: Formation and isolation of HBO, HB18O AND H3B3O3 in argon matrices
作者:Bruce S. Ault
DOI:10.1016/s0009-2614(89)87409-3
日期:1989.5
with the matrixisolation technique to study the reaction of B2H6 with oxygen atoms. N2O and O2 were used as photolytic oxygen atom sources, and a number of oxidation products were detected. Absorptions near 750 and 1813 cm−1 were assigned to H11BO; experiments with 18O led to production of HB18O for the first time, and the identification of two of the fundamentals of this species. Also, H3B3O3 was detected
已将工作在193 nm的受激准分子激光器与基质分离技术结合使用,以研究B 2 H 6与氧原子的反应。将N 2 O和O 2用作光解氧原子源,并检测到许多氧化产物。H 11 BO的吸收在750和1813 cm -1附近;用18 O进行的实验首次产生了HB 18 O,并鉴定了该物种的两个基本原理。另外,在910、1380和2610cm -1附近检测到H 3 B 3 O 3。。另外,初步确定了BH 3的最强的基础在1138 cm -1处。这些观察结果支持了最新假设的乙硼烷氧化机理,以及在此过程中建议的HBO中间性。
Matrix isolation study of the oxidation of diborane: synthesis of boroxin H3B3O3 and its 18O labeled counterparts
作者:Bruce S. Ault
DOI:10.1016/0022-2860(87)80048-0
日期:1987.7
Abstract The matrixisolation technique has been employed in an attempt to characterize intermediates formed during the pyrolysis and pyrolytic oxidation of B 2 H 6 . Samples were passed through a pyrolysis zone heated to as high as 350°C. When no oxygen was present, complete decomposition of the parent diborane was observed, with no new product species. Under these conditions, it is likely that elemental
摘要 基质分离技术已被用于表征在 B 2 H 6 的热解和热解氧化过程中形成的中间体。样品通过加热至高达 350°C 的热解区。当没有氧气存在时,观察到母体乙硼烷完全分解,没有新的产物种类。在这些条件下,元素硼和 H 2 很可能是主要产物。含有 B 2 H 6 和 O 2 的样品的热解导致在 1380 cm -1 附近产生强吸收,通过与文献光谱的比较将其归于硼氧化合物 H 3 B 3 O 3 。18 O 已获得后一种物质的数据,并用于支持该化合物的 D 3h 结构。