TY  - JOUR
AU  - Ulambayar, Bayasgalan
AU  - Batchuluun, Khongorzul
AU  - Bariashir, Chantsalnyam
AU  - Uranbileg, Nergui
AU  - Stammler, Felix J.
AU  - Davaasambuu, Jav
AU  - Schrader, Tobias E.
TI  - Using potassium bromide pellets and optical spectroscopy to assess the photodimerization of two trans -(trifluoromethyl)-cinnamic acid compounds
JO  - CrystEngComm
VL  - 26
IS  - 33
SN  - 1466-8033
CY  - London
PB  - RSC
M1  - FZJ-2025-01714
SP  - 4470 - 4477
PY  - 2024
AB  - 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.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:001280882000001
DO  - DOI:10.1039/D4CE00205A
UR  - https://juser.fz-juelich.de/record/1038903
ER  -