Please use this identifier to cite or link to this item: http://lib.jncasr.ac.in:8080/jspui/handle/10572/1873
Title: Effect of pore occupancy on the acoustic properties of zeolitic imidazolate framework (ZIF)-8: A Brillouin spectroscopic study at ambient and low temperatures
Authors: Radhakrishnan, Dhanya
Narayana, Chandrabhas
Keywords: Physical Chemistry
Atomic, Molecular & Chemical Physics
Metal-Organic Frameworks
Molecular Simulation
Ftir Spectroscopy
Guest Molecules
Gas-Adsorption
High-Pressure
Zif-8
Flexibility
Scattering
Diffusion
Issue Date: 2015
Publisher: American Institute of Physics
Citation: JOURNAL OF CHEMICAL PHYSICS
143
23
Radhakrishnan, D.; Narayana, C., Effect of pore occupancy on the acoustic properties of zeolitic imidazolate framework (ZIF)-8: A Brillouin spectroscopic study at ambient and low temperatures. J. Chem. Phys. 2015, 143 (23), 8.
Abstract: Brillouin spectroscopy is used to study the effect of pore occupancy on the elastic constants by incorporating various guest molecules into zeolitic imidazolate framework (ZIF)-8. A systematic study on the effect of mass and polarizability of the guest has been carried out by incorporating alcohols of varying chain lengths at room temperature. The interaction between the guest and host affects the elastic properties, lifetimes and guest dynamics inside the pores. The elastic anisotropy was seen to reduce upon incorporation of the guests. We have also studied the temperature dependence of the acoustic modes on gas adsorption to understand the framework flexibility. The Brillouin shift of the acoustic modes increases upon temperature dependent gas adsorption with transverse acoustic modes exhibiting a larger shift. This suggests a hardening of otherwise low shear modulus of ZIF-8. Our findings give insight into the role of guest molecules and temperature in tuning the elastic properties of ZIF-8 which is important for practical applications. (C) 2015 AIP Publishing LLC.
Description: Restricted access
URI: http://hdl.handle.net/10572/1873
ISSN: 0021-9606
Appears in Collections:Research Articles (Chandrabhas N.)

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