Citation: LI Jun-Fang, FU Ji-Hong, WANG Chuan-Xing, LI Hui, WANG Ji-De. Oxygenation Reaction and Aging Mechanism of the Triethylenetetramine Cobalt Complex[J]. Chinese Journal of Inorganic Chemistry, ;2015, (4): 673-680. doi: 10.11862/CJIC.2015.071 shu

Oxygenation Reaction and Aging Mechanism of the Triethylenetetramine Cobalt Complex

1.
Key Laboratory of Oil and Gas Fine Chemicals, Ministry of Education & Xinjiang Uygur Autonomous Region, Chemistry and Chemical Engineering of Xinjiang University, Urumqi 830046

Corresponding author: WANG Ji-De,
Received Date: 31 July 2014
Available Online: 14 December 2014
Fund Project: 国家自然科学基金(No.21162027,21261022)资助项目。 (No.21162027,21261022)

The triethylenetetramine-cobalt complex (trien-Co) was synthesized by solid state reaction. The oxygenation of trien-Co and the structure evolution of the oxygenated complexes were investigated by electrospray ionization tandem mass spectrometry, the UV-Vis spectrophotometry, Raman spectrum and Infrared spectroscopy. The experimental results indicated that the uptaking of dioxygen is a dynamic process, and the structures of the oxygenated complex were changed from dinuclear diperoxo-dibridged complex to dinuclear hydroxo-hydroxo dibridge complex in the evolution of oxygenation. ¹⁸O₂ isotope labeling experiments proved the existence of Co-O-O-Co. Furthermore, the acid dissociation tests reveal that the development of hydroxo dibridge species was the reason for the poor reversibility of trien-Co complex. These results provide a new method and experimental basis for investigating the oxygenation and auto-oxidation mechanism of polyamine-Co complexes.
- triethylenetetramine;cobalt complex;electrospray ionization tandem mass spectrometry;oxygenation;isotope labeling;aging
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沈阳化工大学材料科学与工程学院沈阳 110142