Raman spectroscopy studies of the terahertz vibrational modes of a DUT-8 (Ni) metal-organic framework

Abstract

Low-frequency lattice vibration modes have been discussed to play a crucial role in phase transformation process of switchable metal–organic frameworks (MOFs). Therefore, Raman spectroscopy was applied to study lattice dynamics of the pillared layer DUT-8(Ni) framework (DUT – Dresden University of Technology), existing in rigid and flexible form. The open pore phase and the close pore phase could be unanimously identified by breathing modes in the corresponding Raman character of low-frequency vibrations. The flexible version of DUT-8 could be distinguished by orientation dependent Raman spectroscopy experiment