Abstract：
:A classic example of solid-state topochemical reactions is the ultraviolet-light induced photodimerization of α-trans-cinnamic acid (CA). Here, we report the first observation of an X-ray-induced dimerization of CA and monitor it in situ using nonresonant inelastic X-ray scattering spectroscopy (NRIXS). The time-evolution of the carbon core-electron excitation spectra shows the effects of two X-ray induced reactions: dimerization on a short time-scale and disintegration on a long time-scale. We used spectrum simulations of CA and its dimerization product, α-truxillic acid (TA), to gain insight into the dimerization effects. From the time-resolved spectra, we extracted component spectra and time-dependent weights corresponding to CA and TA. The results suggest that the X-ray induced dimerization proceeds homogeneously in contrast to the dimerization induced by ultraviolet light. We also utilized the ability of NRIXS for direct tomography with chemical-bond contrast to image the spatial progress of the reactions in the sample crystal. Our work paves the way for other time-resolved studies on chemical reactions using inelastic X-ray scattering.
journal_name
Sci Repjournal_title
Scientific reportsauthors
Inkinen J,Niskanen J,Talka T,Sahle CJ,Müller H,Khriachtchev L,Hashemi J,Akbari A,Hakala M,Huotari Sdoi
10.1038/srep15851subject
Has Abstractpub_date
2015-11-16 00:00:00pages
15851issn
2045-2322pii
srep15851journal_volume
5pub_type
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