Sorbara, Simona and Casati, Nicola and Colombo, Valentina and Bossola, Filippo and Macchi, Piero (2022) The Dielectric Behavior of Protected HKUST-1. Chemistry, 4 (2). pp. 576-591. ISSN 2624-8549
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Abstract
We investigated the adsorption properties and the dielectric behavior of a very well-known metal-organic framework (MOF), namely Cu3(BTC)2 (known as HKUST-1; BTC = 1,3,5-benzenetricarboxylate), before and after protection with some amines. This treatment has the purpose of reducing the inherent hygroscopic nature of HKUST-1, which is a serious drawback in its application of as low-dielectric-constant (low-κ) material. Moreover, we investigated the structure of HKUST-1 under a strong electric field, confirming the robustness of the framework. Even under dielectric perturbation, the water molecules adsorbed by the MOF remained almost invisible to X-ray diffraction, apart from those directly bound to the metal ions. However, the replacement of H2O with a more visible guest molecule such as CH2Br2 made the cavity that traps the guest more visible. Finally, in this work we demonstrate that impedance spectroscopy is a valuable tool for identifying water sorption in porous materials, providing information that is complementary to that of adsorption isotherms.
Item Type: | Article |
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Subjects: | ArticleGate > Chemical Science |
Depositing User: | APLOS Lib |
Date Deposited: | 19 Jul 2022 03:51 |
Last Modified: | 19 Jul 2022 03:51 |
URI: | http://ebooks.pubstmlibrary.com/id/eprint/461 |