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Multimodal Imaging of Autofluorescent Sites Reveals Varied Chemical Speciation in SSZ‐13 Crystals
Author(s) -
Omori Naomi,
Candeo Alessia,
Mosca Sara,
LezcanoGonzalez Ines,
Robinson Ian K.,
Li Luxi,
Greenaway Alex G.,
Collier Paul,
Beale Andrew M.
Publication year - 2021
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.202015016
Subject(s) - raman spectroscopy , chemical imaging , fluorescence , multispectral image , confocal , fluorescence lifetime imaging microscopy , materials science , imaging spectroscopy , chemistry , mineralogy , analytical chemistry (journal) , geology , optics , remote sensing , environmental chemistry , hyperspectral imaging , physics
Abstract A multimodal imaging study of chabazite is used to show the distribution of and discriminate between different emissive deposits arising as a result of the detemplation process. Confocal imaging, 3D fluorescence lifetime imaging, 3D multispectral fluorescence imaging, and Raman mapping are used to show three different types of emissive behaviours each characterised by different spatial distributions, trends in lifetime, spectral signals, and Raman signatures. A notable difference is seen in the morphology of agglomerated surface deposits and larger subsurface deposits, which experience lifetime augmentation due to spatial confinement. The distribution of organic residue throughout the crystal volume is comparable to XRF mapping that shows Si enrichment on the outer edges and higher Al content through the centre, demonstrating that a fluorescence‐based technique can also be used to indirectly comment on the compositional chemistry of the inorganic framework.