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Identifying the Elusive Framework Niobium in NbS‐1 Zeolite by UV Resonance Raman Spectroscopy
Author(s) -
Chen Yong,
Wang Xinping,
Zhang Lejian
Publication year - 2017
Publication title -
chemphyschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.016
H-Index - 140
eISSN - 1439-7641
pISSN - 1439-4235
DOI - 10.1002/cphc.201700873
Subject(s) - raman spectroscopy , niobium , resonance raman spectroscopy , resonance (particle physics) , zeolite , chemistry , natural bond orbital , spectroscopy , analytical chemistry (journal) , photochemistry , materials science , catalysis , density functional theory , optics , computational chemistry , atomic physics , organic chemistry , physics , quantum mechanics
It was found that bands at 739, 963, and 1107 cm −1 in the resonant Raman spectra are characteristics of framework penta‐coordinated Nb V −OH species, and that a band at 1336 cm −1 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 V −OH species into Nb + and NbO − species due to dehydration was definitively confirmed based on UV resonance Raman and UV/Vis results.