التفاصيل البيبلوغرافية
| العنوان: |
Dispersive x-ray absorption spectroscopy for time-resolved in situ monitoring of mechanochemical reactions. |
| المؤلفون: |
Guilherme Buzanich, Ana, Cakir, C. Tufan, Radtke, Martin, Haider, M. Bilal, Emmerling, Franziska, F. M. de Oliveira, Paulo, Michalchuk, Adam A. L. |
| المصدر: |
Journal of Chemical Physics; 12/7/2022, Vol. 157 Issue 21, p1-11, 11p |
| مصطلحات موضوعية: |
TIME-resolved spectroscopy, X-ray spectroscopy, METAL-organic frameworks, ABSORPTION spectra, GOLD nanoparticles |
| مستخلص: |
X-ray absorption spectroscopy (XAS) provides a unique, atom-specific tool to probe the electronic structure of solids. By surmounting long-held limitations of powder-based XAS using a dynamically averaged powder in a Resonant Acoustic Mixer (RAM), we demonstrate how time-resolved in situ (TRIS) XAS provides unprecedented detail of mechanochemical synthesis. The use of a custom-designed dispersive XAS (DXAS) setup allows us to increase the time resolution over existing fluorescence measurements from ∼15 min to 2 s for a complete absorption spectrum. Hence, we here establish TRIS-XAS as a viable method for studying mechanochemical reactions and sampling reaction kinetics. The generality of our approach is demonstrated through RAM-induced (i) bottom-up Au nanoparticle mechanosynthesis and (ii) the synthesis of a prototypical metal organic framework, ZIF-8. Moreover, we demonstrate that our approach also works with the addition of a stainless steel milling ball, opening the door to using TRIS-DXAS for following conventional ball milling reactions. We expect that our TRIS-DXAS approach will become an essential part of the mechanochemical tool box. [ABSTRACT FROM AUTHOR] |
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| قاعدة البيانات: |
Complementary Index |
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