Selective CF3 Substituted Gold(III)corroles for Electrocatalysis

Kolanu Sudhakar kolanusudhakar@gmail.com Amir Mizrahi Zeev Gross
Department of Chemistry, Technion-Israel Institute of Technology, Haifa, Israel

Day to day human energy consumption is increasing as well as decreasing our limited natural sources. World has looking forward to produce energy by energy conversion technologies for instance fuel cells, metal air batteries, and sensors.1 Several reports proved that the corrole based transition metal complexes are active catalyst for activating small molecule like H2, O2, H2O from the electrocatalysis process.2

Here, we present a selectively Trifluoromethyl (CF3) group substituted goldcorroles for electrocatalysis. Synthetic protocol for trifluomethylation has taken from porphyrin chemistry, well explored CF3 substitution by easy leaving group bromide at -pyrrole position with good yields.3 Similar protocol followed and got a very good yield (upto 75%) for gold corrole complexs from iodinated goldcorrole complexes.4 Examined 2,3,17-tri CF3, ((CF3)3-tpfc)Au) and 2,3,17,18-tetra CF3, ((CF3)4-tpfc)Au) 5,10,15-tri-petafluorophenyl corroles gold(III) complexes are as electrocatalysts for Hydreogen evolution reaction (HER) with TFA in acetonitrile. Observed shift in onset potential for 400 mV measured first reduction at -0.1 V vs Ag/AgCl.

Conclusion, CF3 based gold corrole complexes are very good catalyst for proton reduction under aerobic condition.5

2,3,17,18-tetra CF3 Gold corrole complex for electrocatalysis

References

  1. Watanabe, M.; Thomas, M. L.; Zhang, S.; Yasuda, T.; Dokko, K., Rev. 2017, 117 (10), 7190.
  2. Mahammed, A.; Mondal, B.; Rana, A.; Dey, A.; Gross, Z., Commun. 2014, 50 (21), 2725.
  3. Liu, C.; Chen, Q. Y., J. Org. Chem. 2005, 2005 (17), 3680.
  4. Soll, M.; Sudhakar, K.; Fridman, N.; Müller, A.; Röder, B.; Gross, Z., lett. 2016, 18 (22), 5840.
  5. Sudhakar, K.; Mizrahi, A.; Kosa, M.; Fridman, N.; Gross, Z., Chem. Int. Ed. 2017, 56, 9837.








Powered by Eventact EMS