Citation: LIU Jian, WEI Zhen-Hong, ZHONG Wei, LIU Wen-Ming, LIU Xiao, LIU Xiao-Ming. Iron(Ⅱ) on Functionalised Micro/Nano Silica Gel: Surface Coordination Chemistry and Catalytic Performance for Degradation of 1,2-Dihydroxybenzene[J]. Chinese Journal of Inorganic Chemistry, ;2013, 29(10): 2205-2214. doi: 10.3969/j.issn.1001-4861.2013.00.327 shu

Iron(Ⅱ) on Functionalised Micro/Nano Silica Gel: Surface Coordination Chemistry and Catalytic Performance for Degradation of 1,2-Dihydroxybenzene

1.
1 Department of Chemistry, Nanchang University, Nanchang 330031, China;

Received Date: 24 April 2013
Available Online: 24 May 2013
Fund Project: 国家自然科学基金(No.20871064,21171073)资助项目 (No.20871064,21171073)

Micro/nano silica gel was functionalised with pyridinylthioether moiety. Two functionalised materials, Fe^C@L-NSiGand Fe^S@L-NSiG, were obtained by the coordination of the surface organic molecules with iron (Ⅱ) using FeCl₂ and FeSO₄ as the precursor, respectively. Both materials were characterised using FTIRand UV-Vis spectroscopies, TGAand SEMtechniques. Possible coordination chemistry of the iron(Ⅱ) on the surface functionalised materials and the catalytic performance of the title materials on the catalytic degradation of 1,2-dihydroxybenzene (catechol) by hydrogen peroxide were investigated. Aligand L, 2-(ethylthiomethyl)pyridine with “NS” donor set analogous to the organic functional group immobilised on the surface micro/nano silica gel, was synthesised for the study of the coordination chemistry around the iron (Ⅱ) centre of the two materials. The control complex, [Fe(L)₂Cl₂], used in the investigation was obtained by the reaction of the ligand Lwith FeCl₂. The structure of the complex was determined by using X-ray single crystal diffraction analysis. The results suggest that the material Fe^S@L-NSiGshows higher catalytic efficiency by about one-fold than that of Fe^C@L-NSiG. This better catalytic efficiency is because that the Fe^S@L-NSiGhas more labile ligand(s) around the metal centre compared to its analogue (Fe^C@L-NSiG) and hence makes the substrate easier accessed upon binding to the metal centre. CCDC: 866526.
- heterogeneous catalysis; functionalised micro/nano silica gel; iron(Ⅱ) complex; organic-inorganic hybrid composites; catechol degradation
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沈阳化工大学材料科学与工程学院沈阳 110142