兴奋剂
Atom(片上系统)
过氧化物酶
自旋(空气动力学)
化学
原子物理学
材料科学
凝聚态物理
物理
酶
生物化学
计算机科学
嵌入式系统
热力学
作者
Fayan Zhu,Yueyi Yu,Zhixuan Yu,Haochen Qiu,Guo‐ping Lu,Zhong Chen,Jun Hu,Yamei Lin
出处
期刊:Small
[Wiley]
日期:2024-03-31
标识
DOI:10.1002/smll.202311848
摘要
Abstract Designing biomimetic nanomaterials with peroxidase (POD)‐like activity at neutral pH remains a significant challenge. An S‐doping strategy is developed to afford an iron single‐atom nanomaterial (Fe 1 @CN‐S) with high POD‐like activity under neutral conditions. To the best of knowledge, there is the first example on the achievement of excellent POD‐like activity under neutral conditions by regulating the active site structure. S‐doping not only promotes the dissociation of the N─H bond in 3,3″,5,5″‐tetramethylbenzidine (TMB), but also facilitates the desorption of OH* by the transformation of iron species’ spin states from middle‐spin (MS Fe II ) to low‐spin (LS Fe II ). Meanwhile, LS Fe II sites typically have more unfilled d orbitals, thereby exhibiting stronger interactions with H 2 O 2 than MS Fe II , which can enhance POD‐like activity. Finally, a one‐pot visual detection of glucose at pH 7 is performed, demonstrating the best selectivity and sensitivity than previous reports.
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