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@ARTICLE{Ulambayar:1038903,
      author       = {Ulambayar, Bayasgalan and Batchuluun, Khongorzul and
                      Bariashir, Chantsalnyam and Uranbileg, Nergui and Stammler,
                      Felix J. and Davaasambuu, Jav and Schrader, Tobias E.},
      title        = {{U}sing potassium bromide pellets and optical spectroscopy
                      to assess the photodimerization of two trans
                      -(trifluoromethyl)-cinnamic acid compounds},
      journal      = {CrystEngComm},
      volume       = {26},
      number       = {33},
      issn         = {1466-8033},
      address      = {London},
      publisher    = {RSC},
      reportid     = {FZJ-2025-01714},
      pages        = {4470 - 4477},
      year         = {2024},
      abstract     = {The potential solid-state [2 + 2] photodimerization of two
                      trans-cinnamic acid derivatives,
                      trans-4-(trifluoromethyl)cinnamic acid (4-tfmca) and
                      trans-3-(trifluoromethyl)cinnamic acid (3-tfmca), has been
                      studied using potassium bromide (KBr) pellets and optical
                      spectroscopy. As opposed to taking a powder or single
                      crystal material as a sample, herein, we used
                      polycrystalline samples incorporated in the KBr matrix
                      (pellet) and were able to follow the course of the
                      photochemical reaction via optical spectroscopy. The results
                      show that the photodimerization of 4-tfmca within the KBr
                      matrix yields a photodimer in roughly $100\%$ conversion,
                      while the changes observed for 3-tfmca within the KBr matrix
                      suggest a subtle photochemical change which could not be
                      observed when irradiating the neat powder. This suggests
                      that the KBr matrix helps to couple light into the
                      crystallites of the embedded sample and shows that the KBr
                      matrix reveals photochemistry which might not have been
                      found in the single crystal or powder state of the sample.},
      cin          = {JCNS-FRM-II / MLZ / JCNS-4},
      ddc          = {540},
      cid          = {I:(DE-Juel1)JCNS-FRM-II-20110218 / I:(DE-588b)4597118-3 /
                      I:(DE-Juel1)JCNS-4-20201012},
      pnm          = {6G4 - Jülich Centre for Neutron Research (JCNS) (FZJ)
                      (POF4-6G4) / 632 - Materials – Quantum, Complex and
                      Functional Materials (POF4-632)},
      pid          = {G:(DE-HGF)POF4-6G4 / G:(DE-HGF)POF4-632},
      experiment   = {EXP:(DE-MLZ)BIODIFF-20140101},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:001280882000001},
      doi          = {10.1039/D4CE00205A},
      url          = {https://juser.fz-juelich.de/record/1038903},
}