title: X-ray Excited Optical Fluorescence and Diffraction Imaging of Reactivity and Crystallinity in a Zeolite Crystal: Crystallography and Molecular Spectroscopy in One.
abstract: Structure-activity relationships in heterogeneous catalysis are challenging to be measured on a single-particle level. For the first time, one X-ray beam is used to determine the crystallographic structure and reactivity of a single zeolite crystal. The method generates μm-resolved X-ray diffraction (μ-XRD) and X-ray excited optical fluorescence (μ-XEOF) maps of the crystallinity and Brønsted reactivity of a zeolite crystal previously reacted with a styrene probe molecule. The local gradients in chemical reactivity (derived from μ-XEOF) were correlated with local crystallinity and framework Al content, determined by μ-XRD. Two distinctly different types of fluorescent species formed selectively, depending on the local zeolite crystallinity. The results illustrate the potential of this approach to resolve the crystallographic structure of a porous material and its reactivity in one experiment via X-ray induced fluorescence of organic molecules formed at the reactive centers.
authors.affiliation: Debye Institute for Nanomaterials Science, Utrecht University, Universiteitsweg 99, 3584 CG, Utrecht, The Netherlands.
authors.forename: Zoran
authors.initials: Z
authors.lastname: Ristanović
authors.affiliation: Debye Institute for Nanomaterials Science, Utrecht University, Universiteitsweg 99, 3584 CG, Utrecht, The Netherlands.|Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB, Eindhoven, The Netherlands.
authors.forename: Jan P
authors.initials: JP
authors.lastname: Hofmann
authors.affiliation: European Synchrotron Radiation Facility, 6 rue Jules Horowitz, 38043, Grenoble Cedex, France.|Aix Marseille Université, CNRS, Université de Toulon, IM2NP UMR 7334, 13397, Marseille, France.
authors.forename: Marie-Ingrid
authors.initials: MI
authors.lastname: Richard
authors.affiliation: Debye Institute for Nanomaterials Science, Utrecht University, Universiteitsweg 99, 3584 CG, Utrecht, The Netherlands.
authors.forename: Tao
authors.initials: T
authors.lastname: Jiang
authors.affiliation: European Synchrotron Radiation Facility, 6 rue Jules Horowitz, 38043, Grenoble Cedex, France.
authors.forename: Gilbert A
authors.initials: GA
authors.lastname: Chahine
authors.affiliation: European Synchrotron Radiation Facility, 6 rue Jules Horowitz, 38043, Grenoble Cedex, France.
authors.forename: Tobias U
authors.initials: TU
authors.lastname: Schülli
authors.affiliation: Debye Institute for Nanomaterials Science, Utrecht University, Universiteitsweg 99, 3584 CG, Utrecht, The Netherlands.
authors.forename: Florian
authors.initials: F
authors.lastname: Meirer
authors.affiliation: Debye Institute for Nanomaterials Science, Utrecht University, Universiteitsweg 99, 3584 CG, Utrecht, The Netherlands. b.m.weckhuysen@uu.nl.
authors.forename: Bert M
authors.initials: BM
authors.lastname: Weckhuysen
keywords: X-ray diffraction; ZSM-5; chemical imaging; heterogeneous catalysis; zeolite