Bis(benzimidazole)amino thio- and selenoether Iron(II) complexes as proton reduction electrocatalysts.

Hugo C Hernández-Toledo, Marcos Flores-Alamo, Ivan Castillo

Journal of inorganic biochemistry 2023 Apr

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Two novel Iron (II) complexes featuring tetrapodal bis(benzimidazole)amino thio- and selenoether ligands (LS and LSe) were synthesized, characterized, and tested as electrocatalysts for the hydrogen evolution reaction. The bromide complexes [Fe(LS,LSe)Br2] (1-2) are highly insoluble, but their DMSO solvates were characterized by single crystal X-ray diffraction, revealing an octahedral coordination environment that does not feature coordination of the chalcogen atoms. The corresponding triflate derivatives [Fe(LS,LSe)(MeCN)3]OTf2 (1c-2c) were employed for electrocatalytic proton reduction, with 1c exhibiting higher activity, thus suggesting that the thioether may participate as a more competent pendant ligand for proton transfer. Copyright © 2023 Elsevier Inc. All rights reserved.

Citation

Hugo C Hernández-Toledo, Marcos Flores-Alamo, Ivan Castillo. Bis(benzimidazole)amino thio- and selenoether Iron(II) complexes as proton reduction electrocatalysts. Journal of inorganic biochemistry. 2023 Apr;241:112128