Metal (III) Complex Of Biuret-Amide Based Macrocyclic Ligand As Green Oxidation Catalyst
申请人:Sengupta Sayam
公开号:US20120329680A1
公开(公告)日:2012-12-27
The present invention discloses metal (III) complex of a biuret-amide based macrocyclic ligand as green catalysts that exhibit both excellent reactivity for the activation of H
2
O
2
and high stability at low pH and high ionic strength. The invention also provides macrocyclic biuret amide based ligand for designing of functional peroxidase mimics. Further, the present invention discloses synthesis of said metal (III) complex of a biuret-amide based macrocyclic ligand.
Reactivity and Operational Stability of<i>N</i>-Tailed TAMLs through Kinetic Studies of the Catalyzed Oxidation of Orange II by H<sub>2</sub>O<sub>2</sub>: Synthesis and X-ray Structure of an<i>N</i>-Phenyl TAML
作者:Genoa R. Warner、Matthew R. Mills、Clarissa Enslin、Shantanu Pattanayak、Chakadola Panda、Tamas Kumar Panda、Sayam Sen Gupta、Alexander D. Ryabov、Terrence J. Collins
DOI:10.1002/chem.201406061
日期:2015.4.13
The catalytic activity of the N‐tailed (“biuret”) TAML (tetraamidomacrocyclicligand) activators [Fe4‐XC6H3‐1,2‐(NCOCMe2NCO)2NR}Cl]2− (3; N atoms in boldface are coordinated to the central iron atom; the same nomenclature is used in for compounds 1 and 2 below), [X, R=H, Me (a); NO2, Me (b); H, Ph (c)] in the oxidative bleaching of Orange II dye by H2O2 in aqueous solution is mechanistically compared
所述的催化活性Ñ -尾部(“缩二脲”)TAML(四酰胺大环配体)的活化剂的[Fe 4-XC 6 H ^ 3 -1,2-(Ñ COCMe 2 Ñ CO)2 NR} CL] 2-(3;黑体字的N原子与中心铁原子配位;以下化合物1和2使用相同的命名法),[X,R = H,Me(a); NO 2,我(b);H 2 O 2对Orange II染料的氧化漂白中的H,Ph(c)]与先前研究的活化剂[Fe 4-XC 6 H 3 1,2- (N COCMe 2 N CO)2 CMe 2 } OH 2 ] -(1)和更具腐蚀性的类似物[Fe (Me 2 C CON(1,2-C 6 H 3−4 -X)N CO} 2)OH 2 ] -(2)。通过3催化H 2 O 2之间的反应和橙色II(S)会根据通常针对TAML活化剂发现的速率定律发生(v = k I k II [Fe III ] [S] [H 2 O 2
US8754206B2
申请人:——
公开号:US8754206B2
公开(公告)日:2014-06-17
Homogeneous Photochemical Water Oxidation by Biuret-Modified Fe-TAML: Evidence of Fe<sup>V</sup>(O) Intermediate
作者:Chakadola Panda、Joyashish Debgupta、David Díaz Díaz、Kundan K. Singh、Sayam Sen Gupta、Basab B. Dhar
DOI:10.1021/ja503753k
日期:2014.9.3
Water splitting, leading to hydrogen and oxygen in a process that mimics natural photosynthesis, is extremely important for devising a sustainable solarenergyconversionsystem. Development of earth-abundant, transition metal-based catalysts that mimic the oxygen-evolving complex of photosystem II, which is involved in oxidation of water to O2 during natural photosynthesis, represents a major challenge
水分解,在模拟自然光合作用的过程中产生氢和氧,对于设计可持续的太阳能转换系统极为重要。开发地球上丰富的过渡金属基催化剂,模拟光系统 II 的析氧复合物,在自然光合作用过程中参与将水氧化成 O2,这是一项重大挑战。此外,了解确切的机制,包括阐明活性金属氧中间体在水氧化 (WO) 过程中的作用,对于开发更有效的催化剂至关重要。在此,我们报告了双缩脲修饰的四酰胺大环配体(Fe-TAML;1a 和 1b)的 Fe(III) 配合物,它们催化快速、均匀的光化学 WO 产生 O2,具有中等效率(最大 TON = 220,TOF = 0.76 s(-1))。先前对使用铁络合物的光化学 WO 的研究导致铁络合物的脱金属,同时形成负责 WO 的氧化铁纳米颗粒 (NPs)。在此,我们首次证明高价 Fe(V)(O) 中间体是光化学生成的,作为将水氧化成 O2 的活性中间体。据我们所知,这代表了分子铁络合物通过 Fe(V)(O)
Electrocatalytic water oxidation by a molecular cobalt complex through a high valent cobalt oxo intermediate
作者:Debasree Das、Santanu Pattanayak、Kundan K. Singh、Bikash Garai、Sayam Sen Gupta
DOI:10.1039/c6cc05773j
日期:——
Biuret-modified tetraamidomacrocyclic cobalt complex [CoIII-bTAML]- is shown to catalyze electrochemical water oxidation at basic pH leading to formation of O2. Electrochemical and spectroscopic studies indicate a high valentcobalt oxo...