Kinetics of the rapid interaction of bis(histidinato)-cobalt(II) with oxygen

Simplicio, Jon; Wilkins, Ralph G.

doi:10.1021/ja01000a017

Cited by 56 publications

(22 citation statements)

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“…The formation of M xþ ···O 2 complex that represented in Eq. (R 5) have been confirmed Simplicio and Wilkins [22] , who have done the study on the reaction kinetics of interaction between bis(histidinato) cobalt(II) (Co(L-h) 2 ) and oxygen.…”

Section: Roles Of Metals and Metallic Compounds As Degradation Accelesupporting

confidence: 53%

Roles of Calcium, Zinc, Copper and Titanium Compounds on the Degradation of Polymers

Chee

Sin

Bee

et al. 2015

Polymer-Plastics Technology and Engineering

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In this article, the influences of the metallic filler content upon the thermal degradability of polymer composites such as initial degradation temperature, maximum degradation temperature and char content have been critically reviewed using thermogravimetric analysis. Besides that, the review on the relationship between activation energies of polymer/metal composites, which was obtained from various degrade models, and the content of metallic fillers have also been defined. Other thermal properties such as glass transition temperature (T g ) and melting temperature (T m ) have also been reviewed based on the evaluation of differential scanning calorimetry (DSC) analysis.

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Section: Roles Of Metals and Metallic Compounds As Degradation Accelesupporting

confidence: 53%

Roles of Calcium, Zinc, Copper and Titanium Compounds on the Degradation of Polymers

Chee

Sin

Bee

et al. 2015

Polymer-Plastics Technology and Engineering

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“…[52] These species are interrelated as Co III À O 2 * can (possibly reversibly) bind to Co II molecules with one available coordination site, as shown for Co complexes in water. [54][55][56][57] Binuclear Co-peroxo complexes also form in DMF. [58] In the cited studies, the formation of peroxo-species was favored over the formation of superoxo-species.…”

Section: Discussionmentioning

confidence: 99%

Aerobic Epoxidation of Olefins Catalyzed by the Cobalt‐Based Metal–Organic Framework STA‐12(Co)

Beier

Kleist

Wharmby

et al. 2011

Chemistry A European J

115

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“…Studies have demonstrated the mechanisms by which biological enzymes activate oxygen molecules. However, reversible oxygenation complexes, which can be used as a model compound of hemoglobin, have been rarely reported because available oxygenation complexes are unstable; as a result, researchers experience difficulty in characterizing the exact structures of products [ 27 , 28 ]. Two major problems are encountered in studies involving the oxygenation of cobalt complexes in an aqueous solution: (1) complexes absorb dioxygen immediately when they are formed under ambient conditions and (2) aging phenomenon or the oxidation of the oxygenated complex occurs until the aging process is completed [ 29 , 30 ].…”

Section: Introductionmentioning

confidence: 99%

Reversible Oxygenation ofα-Amino Acid–Cobalt(II) Complexes

Zhang

Yue

et al. 2016

Bioinorganic Chemistry and Applications

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We systematically investigated the reversibility, time lapse, and oxygenation-deoxygenation properties of 15 natural α-amino acid–Co(II) complexes through UV-vis spectrophotometer, polarographic oxygen electrode, and DFT calculations, respectively, to explore the relationship between the coordinating structure and reversible oxygenation of α-amino acid–Co(II) complexes. Results revealed that the α-amino acid structure plays a key role in the reversible oxygenation properties of these complexes. The specific configuration of the α-amino acid group affects the eg 1 electron of Co(II) transfer to the π ⁎ orbit of O2; this phenomenon also favors the reversible formation and dissociation of Co–O2 bond when O2 coordinates with Co(II) complexes. Therefore, the co-coordination of amino and carboxyl groups is a determinant of Co complexes to absorb O2 reversibly. The group adjacent to the α-amino acid unit evidently influences the dioxygen affinity and antioxidation ability of the complexes. The presence of amino (or imino) and hydroxy groups adjacent to the α-amino acid group increases the oxygenation-deoxygenation rate and the number of reversible cycles. Our findings demonstrate a new mechanism to develop reversible oxygenation complexes and to reveal the oxygenation of oxygen carriers.

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Kinetics of the rapid interaction of bis(histidinato)-cobalt(II) with oxygen

Cited by 56 publications

References 0 publications

Roles of Calcium, Zinc, Copper and Titanium Compounds on the Degradation of Polymers

Roles of Calcium, Zinc, Copper and Titanium Compounds on the Degradation of Polymers

Aerobic Epoxidation of Olefins Catalyzed by the Cobalt‐Based Metal–Organic Framework STA‐12(Co)

Reversible Oxygenation ofα-Amino Acid–Cobalt(II) Complexes

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