Directing Group Strategy for the Isolation of Organoselenium(VI) Benzoselenonates: Metal-Free Catalysts for Hydrogen Evolution Reaction
作者:Monojit Batabyal、Svastik Jaiswal、Raushan Kumar Jha、Sangit Kumar
DOI:10.1021/jacs.3c10572
日期:2024.1.10
organoelements, particularly organoseleniums in their highest VI oxidation state, is limited owing to their stability and synthesis. Herein, the isolation of a new class of quinolinyl-embedded, hexavalent selenium(VI) benzoselenonates has been discussed and further evaluated for a metal-free electrocatalytic hydrogen evolution reaction (HER). The Se(VI) benzoselenonates exhibited high Faradaic efficiency (F
第四周期有机元素,特别是处于最高 VI 氧化态的有机硒,由于其稳定性和合成而受到限制。在此,讨论了新型喹啉基嵌入的六价苯并硒酸硒 (VI) 的分离,并进一步评估了无金属电催化析氢反应 (HER)。 Se(VI)苯并硒酸盐表现出高达86%的无金属H 2气体生产的高法拉第效率(FE),以及高达43的非常好的周转数(TON)和500 mV的中等过电势(η);在弱乙酸源存在下,在去质子化程度较低的 DMF 溶剂中。结合各种(NMR、UV-vis 和 EPR)光谱和 DFT 计算研究,提出了一条合理的 HER 途径,这表明喹啉基环的电化学还原是引发步骤,Se(VI) 充当反应位点通过涉及用于电化学H 2气体生成的氢型中间体。