Radhakrishnan, Dhanya ; Narayana, Chandrabhas (2016) Guest dependent Brillouin and Raman scattering studies of Zeolitic Imidazolate Framework-8 (ZIF-8) under external pressure The Journal of Chemical Physics, 144 (13). Article ID 134704. ISSN 0021-9606
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Official URL: https://aip.scitation.org/doi/abs/10.1063/1.494501...
Related URL: http://dx.doi.org/10.1063/1.4945013
Abstract
We have investigated the pressure dependence of the acoustic modes of Zeolitic Imidazolate Framework (ZIF-8) in different pressure transmitting mediums and also under non-hydrostatic conditions using high pressureBrillouin spectroscopy. Our study shows the pressure induced flexibility and dynamics of ZIF-8 framework as well as a huge increase in the acoustic velocities on applying external pressure, illustrating the role of guest in enhancing the elastic properties of the framework. In fact, the elastic constant C11 of the guest incorporated ZIF-8 increases by ∼183% on applying a pressure of only 1.47 GPa. The pressure transmitting medium also plays an important role in controlling the gate opening behaviour of ZIF-8. Pressure dependent Raman study shows significant changes in the modes of ZIF-8 as well as that of that of the pressuretransmitting medium which is entrapped within the framework, indicating that the interaction between the framework and guest is responsible for the medium dependent changes observed in the Brillouinspectra.
Item Type: | Article |
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Source: | Copyright of this article belongs to AIP Publishing. |
ID Code: | 113715 |
Deposited On: | 30 Apr 2018 11:50 |
Last Modified: | 30 Apr 2018 11:50 |
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