Supramolecular xerogel linked with cobalt(II) ions: A facile method toward O2 storage and catalyzation of cyclohexene oxidation

• Published in: Colloids and surfaces. A, Physicochemical and engineering aspects Physicochemical and engineering aspects, 2016-10, Vol.506, p.514-518
• Main Authors: Xue, Peng, Wei, Yana, Wu, Huiqiong, Wang, Xiaojuan, He, Ting, Shen, Rujuan, Yue, Fan, Wang, Jide, Zhang, Yi
• Format: Article
• Language: English
• Subjects: Absorb oxygen; Catalyze cyclohexene oxidation; β-AspFF; β-AspFF-Co(II) xerogel
• ISSN: 0927-7757; 1873-4359
• DOI: 10.1016/j.colsurfa.2016.06.048

[Display omitted] ⿢β-AspFF xerogel linked with Co(II) ions have the capacity to stably store oxygen.⿢β-AspFF-Co(II) complex could activate dioxygen to catalyze cyclohexene oxidation reaction.⿢A higher efficient for catalyzing cyclohexene oxidation system was exhibited by β-AspFF-Co(II) xerogel. This paper introduces a tripeptide (β-Asp-Phe-Phe, abbreviation β-AspFF) which can self-assemble into long nanofibrils in toluene solvent and further entangle to organogels. The nanofibrils of β-AspFF can serves as ligands to incorporate with Co(II) in the organogels. After being re-immersed into HFIP-H2O mixed solution (Volume Ratio, 1:1), the β-AspFF-Co(II) xerogel exhibited decent oxygen binding properties. Impressively, in comparing with β-AspFF-Co(II) complex, the β-AspFF-Co(II) xerogel proved to be a higher efficient catalyst for catalyzing cyclohexene oxidation reaction. We therefore suppose that the porous and nanofibrils structure of the xerogel plays a key role to improve the catalytic behavior of β-AspFF-Co(II) complex.