Reversible Oxygenation Properties of 2,3-Diaminopropanoic Acid Cobalt Complex

doi:10.3969/j.issn.0251-0790.2012.07.002

Abstract

Abstract: Oxygenation property and reversibility of 2,3-diminopropanoic acid were continuously determined by means of UV-Vis spectrophotometry under alternating O₂ or N₂ atmospheres and oxygen electrode. The results show that the reversibility of the complex is excellent in aqueous solution at room temperature. Oxygenation reaction took place at pH=6.5 system and formed a stable species in a pH range of 7.0-10.0 according to pH-A curve. The component of oxygenation species was n(Co)∶n(DAPA)∶n(O₂)=1∶2∶1 which was confirmed by equimolar ratio and gas volumetric method. UV-Vis spectra were recorded at 384 nm and room temperature in pH=7.0 aqueous solution. The results show that 5% of its original oxygenation capacity is still remained after DAPA-Co(Ⅱ) continuously undergoes 150 oxygenation-deoxygenation cycles in 85 h.

Key words: Oxygen carrier, 2,3-Diminopropanoic acid, Cobalt(Ⅱ), Oxygenation complex

CLC Number:

O614

TrendMD:

ZHANG Xin-Cun, YUE Fan, HUANG Yan, FU Pei, CHENG Xiang, WANG Ji-De. Reversible Oxygenation Properties of 2,3-Diaminopropanoic Acid Cobalt Complex[J]. Chem. J. Chinese Universities, 2012, 33(07): 1370.

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Reversible Oxygenation Properties of 2,3-Diaminopropanoic Acid Cobalt Complex

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