What is it about?
This article explains a simple sample preparation technique to prevent sublimation of vacuum sensitive organic compounds under high vacuum conditions of a transmission electron microscope at room temperature for structure determination and electron diffraction studies.
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Why is it important?
This sample preparation technique could be used as a complementary method to cryogenic techniques for analyzing high-vapor-pressure organic compounds at room temperature for serial/micro electron diffraction studies.
Perspectives
We demonstrate that serial electron diffraction, paired with a simple sample-encapsulation method, can be used to determine high-resolution structures of high-vapor-pressure, vacuum-sensitive organic compounds in their solid state at room temperature, thereby avoiding the need for cryogenic methods. We successfully solved the structure of anthracene at 0.75 Å resolution and pyrene at 0.80 Å. This encapsulation approach may also enable room-temperature MicroED measurements of other vacuum-sensitive organic crystals.
Sreelaja Pulleri Vadhyar
University of Toronto
Read the Original
This page is a summary of: Room-temperature structure determination of vacuum-sensitive organic compounds by formvar encapsulation and serial electron diffraction, Journal of Applied Crystallography, November 2025, International Union of Crystallography,
DOI: 10.1107/s1600576725009823.
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