Premium
Following a Photoinduced Reconstructive Phase Transformation and its Influence on the Crystal Integrity: Powder Diffraction and Theoretical Study
Author(s) -
Runčevski Tomče,
BlancoLomas Marina,
Marazzi Marco,
Cejuela Marcos,
Sampedro Diego,
Dinnebier Robert E.
Publication year - 2014
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201402515
Subject(s) - crystallinity , amorphous solid , materials science , autocatalysis , crystal (programming language) , phase (matter) , kinetics , chemistry , yield (engineering) , crystallography , chemical physics , photochemistry , organic chemistry , physics , catalysis , composite material , quantum mechanics , computer science , programming language
In the course of solid‐state photoreactions, a single crystal (SC) of the reactant can be transformed into an SC of the product or it can lose crystallinity and become amorphous. In‐between these two scenarios exist the reconstructive phase transformations, where upon irradiation, the reactant SC becomes a powder or an SC with increased mosaicity. We present a detailed description of reconstructive photodimerization, where the structural changes are directly correlated with the disintegration process. The kinetics of the reaction is explained by two kinetic regimes, forming an autocatalytic autoinhibition photoreaction set with high quantum yield. In addition, the photoreaction pathways were studied theoretically.