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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},
}