Following a photoinduced reconstructive phase transformation and its influence on the crystal integrity: Powder diffraction and theoretical study

  1. Runčevski, T. 4
  2. Blanco-Lomas, M. 1
  3. Marazzi, M. 23
  4. Cejuela, M. 1
  5. Sampedro, D. 1
  6. Dinnebier, R.E. 4
  1. 1 Universidad de La Rioja
    info

    Universidad de La Rioja

    Logroño, España

    ROR https://ror.org/0553yr311

  2. 2 Universidad de Alcalá
    info

    Universidad de Alcalá

    Alcalá de Henares, España

    ROR https://ror.org/04pmn0e78

  3. 3 Karlsruhe Institute of Technology
    info

    Karlsruhe Institute of Technology

    Karlsruhe, Alemania

    ROR https://ror.org/04t3en479

  4. 4 Max Planck Institute for Solid State Research
    info

    Max Planck Institute for Solid State Research

    Stuttgart, Alemania

    ROR https://ror.org/005bk2339

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Journal:
Angewandte Chemie International

ISSN: 1433-7851

Year of publication: 2014

Volume: 53

Issue: 26

Pages: 6738-6742

Type: Article

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DOI: 10.1002/ANIE.201402515 SCOPUS: 2-s2.0-84903269444 WoS: WOS:000338021600029 GOOGLE SCHOLAR lock_openOpen access editor

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Abstract

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. Changing phases: In the course of solid-state photoreactions, the single crystal of a reactant can be transformed into a single crystal of the product or it can become amorphous. Between these scenarios exist the reconstructive phase transformations, where the single crystal becomes a powder. A detailed description of the latter is given. © 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.