Omori Naomi, Candeo Alessia, Mosca Sara, Lezcano-Gonzalez Ines, Robinson Ian K, Li Luxi, Greenaway Alex G, Collier Paul, Beale Andrew M
Department of Chemistry, University College London, 20 Gordon Street, London, WC1H 0AJ, UK.
The Research Complex at Harwell, Rutherford Appleton Laboratory, Harwell Campus, Didcot, Oxfordshire, OX11 0FA, UK.
Angew Chem Int Ed Engl. 2021 Mar 1;60(10):5125-5131. doi: 10.1002/anie.202015016. Epub 2021 Jan 25.
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.
一项关于菱沸石的多模态成像研究用于展示脱模板过程中产生的不同发光沉积物的分布并加以区分。共聚焦成像、三维荧光寿命成像、三维多光谱荧光成像和拉曼映射被用于展示三种不同类型的发光行为，每种行为的特征在于不同的空间分布、寿命趋势、光谱信号和拉曼特征。在团聚的表面沉积物和较大的地下沉积物的形态上可以看到一个显著差异，由于空间限制，这些沉积物的寿命会增加。整个晶体体积中有机残余物的分布与X射线荧光映射结果相当，X射线荧光映射显示晶体外边缘硅富集，中心铝含量更高，这表明基于荧光的技术也可用于间接评论无机骨架的组成化学。
