Halogenated compounds are commonly used during water treatment, as solvents during manufacturing, and in the production of pesticides. These sometimes toxic and carcinogenic compounds are stable and non-biodegradable, allowing long persistence in the environment. Here, we examine the kinetics of the defluorinaton of halogenated arenes using MOF-supported and unsupported rhodium catalysts with GCMS spectroscopy. Two MOF-supported Rh complexes (ZJU-28 and ZIF-8) have been synthesized and tested as defluorination catalysts under mild conditions (1 atm H2, water, 25 oC). Kinetic rates were compared to rates of unsupported rhodium on alumina catalyst (Rh/Al2O3) defluorination. Synthesized MOF-Rh complexes displayed evidence of successful defluorination catalysis and showed relative rates slower than use of Rh/Al2O3 catayst. ZJU-28 catalyst fluorobenzene deflorination rate was 0.5x the rate of Rh on alumina catalyst. 2-fluorotoluene deflorination by ZJU-28 cataylst was 0.5x of unsupported catalyst rate.

Defluorination of fluoroarenes under mild conditions using Rh-MOFs

2019 Spring National Meeting

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