abstract
Thermal destruction of giant polyoxometalate (POM) high-symmetry nanoclusters (toroidal Mo-138 and Keplerates Mo-132 and Mo-72 Fe-30 ) was in situ investigated by Raman and IR spectroscopy. The key spectral features of POM integrity and destruction products were determined. Polarization Raman measurements of Keplerate nanoclusters carried out for the first time allowed us to determine the full set of totally symmetric modes and improve the attribution of spectral bands. The obtained results are general for all types of POMs and can be used to control the POM's integrity during the synthesis of new nanoclusters' based hybrid materials.
keywords
RAMAN-SPECTROSCOPY; MOLYBDENUM; STABILITY; MOLYBDATE; MO72FE30; CLUSTER; SPECTRA; POLYOXOMOLYBDATES; DEFECTS; SPHERES
subject category
Chemistry
authors
Grzhegorzhevskii, KV; Zelenovskiy, PS; Koryakova, OV; Ostroushko, AA
our authors
Pavel Zelenovskii
Researcheracknowledgements
This work was performed in frames of State Task by the RF Ministry of Education and Science (project no. 4.6653.2017/8.9), and Competitiveness Enhancement Program of Ural Federal University (founded by the Government of the Russian Federation Act 211, contract. 02.A03.21.0006). We express our gratitude to Russian Foundation for Basic Research which supported these researches (project number 16-33-00570). The equipment of Ural Centre for Shared Use Modern nanotechnology Ural federal university was used.