Identifying the Elusive Framework Niobium in NbS-1 Zeolite by UV Resonance Raman Spectroscopy.

Chemphyschem

State Key Laboratory of Fine Chemicals, School of Environmental Science and Technology, Dalian University of Technology, Dalian, 116024, P. R. China.

Published: December 2017

It was found that bands at 739, 963, and 1107 cm in the resonant Raman spectra are characteristics of framework penta-coordinated Nb -OH species, and that a band at 1336 cm in the UV Raman spectrum with excitation line at 320 nm is a sensitive detector for identifying extra-framework niobium species. The change of framework penta-coordinated Nb -OH species into Nb and NbO species due to dehydration was definitively confirmed based on UV resonance Raman and UV/Vis results.

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Source
http://dx.doi.org/10.1002/cphc.201700873DOI Listing

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