Impact of Secondary Sphere Hydrogen Bonds on O2 Reactivity within a Nonheme Iron Complex.

IF 15.6 1区 化学 Q1 CHEMISTRY, MULTIDISCIPLINARY Journal of the American Chemical Society Pub Date : 2025-02-12 Epub Date: 2025-02-02 DOI:10.1021/jacs.4c15153
Andrew R LaDuca, Jessica R Wilson, Writhabrata Sarkar, Matthias Zeller, Nathaniel K Szymczak
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Abstract

A nonheme iron complex bearing the tris(6-phenylamino-pyridyl)methylamine (TPANHPh) ligand with appended hydrogen bond (H-bond) groups displays facile O2 reactivity to form a monomeric Fe(III)OH complex, which can release •OH via rebound to a carbon radical. An analogous compound without H-bonds, based on tris(6-methylpyridyl)methylamine (TPAMe), exhibits minimal O2 reactivity, forming a Fe(III)2(μ-O)(μ-OH) dimer, which also reacts with carbon-based radicals. The H-bonding system enables O2 binding and activation at weakly reducing nonheme iron complexes, highlighting a cooperative role of secondary sphere units to facilitate reactions at atypical redox environments.

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非血红素铁配合物中二次球形氢键对氧反应性的影响。
非血红素铁配合物携带三(6-苯基-吡啶基)甲胺(TPANHPh)配体和附加氢键(h -键)基团,表现出容易的氧反应性,形成单体Fe(III)OH配合物,该配合物可以通过反弹到碳自由基上释放•OH。以三(6-甲基吡啶基)甲胺(TPAMe)为基料,无氢键的类似化合物表现出极小的氧反应性,形成Fe(III)2(μ-O)(μ-OH)二聚体,也与碳基自由基反应。h键系统使O2结合和激活弱还原非血红素铁配合物,突出了次级球单元在非典型氧化还原环境中促进反应的协同作用。
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来源期刊
CiteScore
24.40
自引率
6.00%
发文量
2398
审稿时长
1.6 months
期刊介绍: The flagship journal of the American Chemical Society, known as the Journal of the American Chemical Society (JACS), has been a prestigious publication since its establishment in 1879. It holds a preeminent position in the field of chemistry and related interdisciplinary sciences. JACS is committed to disseminating cutting-edge research papers, covering a wide range of topics, and encompasses approximately 19,000 pages of Articles, Communications, and Perspectives annually. With a weekly publication frequency, JACS plays a vital role in advancing the field of chemistry by providing essential research.
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