Shock Wave Chemistry in a Metal-Organic Framework.
Metal-organic frameworks (MOFs) have potential applications as energy absorbing materials for shock wave energy mitigation due to their nanoporosity. Here we have examined km/s laser-driven flyer plate impacts on a prototypical MOF, ZIF-8. We observed particle fragmentation and morphological changes in microcrystals of ZIF-8 at lower shock pressures (≈2.5 GPa), and amorphization and structural collapse at higher pressures (≈8 GPa). High-speed emission spectroscopy revealed that 50 ns after flyer plate impacts, an emission pulse was generated by ZIF-8 resulting from chemical bonds that were broken and subsequently reformed. MOFs may prove useful in the dissipation of shock wave energy through large structural changes (free volume collapse and endothermic bond breakage).
Department of Chemistry, University of Illinois at Urbana-Champaign , Urbana, Illinois 61801, United States.
Zhi
Z
Su
Department of Chemistry, University of Illinois at Urbana-Champaign , Urbana, Illinois 61801, United States.
William L
WL
Shaw
Department of Chemistry, University of Illinois at Urbana-Champaign , Urbana, Illinois 61801, United States.
Yu-Run
YR
Miao
Department of Chemistry, University of Illinois at Urbana-Champaign , Urbana, Illinois 61801, United States.
Sizhu
S
You
Department of Chemistry, University of Illinois at Urbana-Champaign , Urbana, Illinois 61801, United States.
Dana D
DD
Dlott
Department of Chemistry, University of Illinois at Urbana-Champaign , Urbana, Illinois 61801, United States.
Kenneth S
0000-0001-5422-0701
KS
Suslick