Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195 Berlin, Germany.
Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciences, Flemingovo nám. 2, 16610 Prague 6, Czech Republic.
J Am Chem Soc. 2022 May 4;144(17):7790-7795. doi: 10.1021/jacs.2c01232. Epub 2022 Apr 26.
We present chemical kinetics measurements of the luminol oxidation chemiluminescence (CL) reaction at the interface between two aqueous solutions, using liquid jet technology. Free-flowing liquid microjets are a relatively recent development that have found their way into a growing number of applications in spectroscopy and dynamics. A variant thereof, called flat-jet, is obtained when two cylindrical jets of a liquid are crossed, leading to a chain of planar leaf-shaped structures of the flowing liquid. We here show that in the first leaf of this chain, the fluids do not exhibit turbulent mixing, providing a clean interface between the liquids from the impinging jets. We also show, using the example of the luminol CL reaction, how this setup can be used to obtain kinetics information from friction-less flow and by circumventing the requirement for rapid mixing by intentionally suppressing all turbulent mixing and instead relying on diffusion.
我们提出了使用液体喷射技术在两种水溶液界面处进行鲁米诺氧化化学发光（CL）反应的化学动力学测量。自由流动的液体微射流是一种相对较新的发展，已经在越来越多的光谱学和动力学应用中找到了自己的位置。其中一种变体，称为扁平射流，是当两种液体的圆柱形射流交叉时获得的，导致流动液体的一系列平面叶状结构。我们在这里表明，在这个链的第一个叶片中，流体不表现出湍流混合，从而在撞击射流的液体之间提供了一个干净的界面。我们还通过鲁米诺 CL 反应的例子表明，如何使用这种设置从无摩擦流动中获得动力学信息，并通过故意抑制所有湍流混合而不是依赖扩散来避免快速混合的要求。
