| Autor: |
Oksana Smirnova, Seungtaik Hwang, Roman Sajzew, Aaron Reupert, Vahid Nozari, Samira Savani, Christian Chmelik, Lothar Wondraczek, Jörg Kärger, Alexander Knebel |
| Rok vydání: |
2023 |
| DOI: |
10.26434/chemrxiv-2023-b8nnx |
| Popis: |
Porous materials, such as metal-organic frameworks emerge to solve important quests of our modern society, such as CO2 sequestration. Zeolitic Imidazolate Frameworks (ZIFs) can undergo a glass transition to form ZIF-glasses; they combine the liquid handling of classical glasses with tremendous potential for gas separations. Using millimeter-sized ZIF-62 single crystals and centimeter-sized ZIF-62-glass we demonstrate scalability and processability. Further, following the evolution of gas penetration into ZIF-crystals and ZIF-glasses by IR microimaging techniques enables to determine diffusion constants and changes to the pore architecture on the Angstrom-scale. The evolution of ZIF-glasses is observed in situ using a microscope heating stage. The pore-collapse during glass-processing is tracked by changes to density and volume of the glasses. Mass spectrometry investigates the crystal-to-glass transition and thermal processing ability. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
|
