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Title: Guest dependent Brillouin and Raman scattering studies of zeolitic imidazolate framework-8 (ZIF-8) under external pressure
Authors: Radhakrishnan, Dhanya
Narayana, Chandrabhas
Keywords: Chemistry
Metal-Organic Frameworks
Ftir Spectroscopy
N-2 Adsorption
Issue Date: 2016
Publisher: American Institute Physics
Citation: Radhakrishnan, D.; Narayana, C., Guest dependent Brillouin and Raman scattering studies of zeolitic imidazolate framework-8 (ZIF-8) under external pressure. Journal of Chemical Physics 2016, 144 (13), 6
Journal of Chemical Physics
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 pressure Brillouin 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 C-11 of the guest incorporated ZIF-8 increases by similar to 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 pressure transmitting 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 Brillouin spectra. (C) 2016 AIP Publishing LLC.
Description: Restricted Access
ISSN: 0021-9606
Appears in Collections:Research Articles (Chandrabhas N.)

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