Ionothermal syntheses of three transition-metal-containing polyoxotungstate hybrids exhibiting the photocatalytic and electrocatalytic properties
- Key Laboratory of Polyoxometalate Science of Ministry of Education, Department of Chemistry, Northeast Normal University, Ren Min Street No. 5268, Changchun, Jilin 130024 (China)
Employing the ionothermal synthesis approach, three new transition-metal-containing polyoxotungstate hybrids: [Dmim]{sub 2}Na{sub 3}[SiW{sub 11}O{sub 39}Fe(H{sub 2}O)].H{sub 2}O (Dmim=1,3-Dimethylimidazole) (1), [Emim]{sub 9}Na{sub 8}[(SiW{sub 9}O{sub 34}){sub 3}{l_brace}Fe{sub 3}(mu{sub 2}-OH){sub 2}(mu{sub 3}-O){r_brace}{sub 3}(WO{sub 4})].0.5H{sub 2}O (Emim=1-Ethyl-3-meth-ylimidazole) (2) and [Dmim]2[HMim]Na{sub 6}[(AsW{sub 9}O{sub 33}){sub 2}{l_brace}Mn{sup III}(H{sub 2}O){r_brace}{sub 3}].3H{sub 2}O (Dmim=1,3-Dimethylimidazole; Mim=1-Methylimidazole) (3) have been synthesized in 1-ethyl-3-methyl imidazolium bromide ([Emim]Br) ionic liquids (ILs). Compound 1 possesses a 3-D open framework constructed from the mono-iron{sup III}-substituted alpha-Keggin-type anion and the organic cations [Dmim]+ through the hydrogen bond interactions. Compound 2 contains a [{l_brace}Fe{sup III}{sub 3}(mu{sub 2}-OH){sub 2}(mu{sub 3}-O){r_brace}{sub 3}(mu{sub 4}-WO{sub 4})] cluster surrounded by three [SiW{sub 9}O{sub 34}]{sup 10-} ligands, eight sodium cations and nine dissociative [Emim]{sup +} cations around the polyoxoanion. The polyoxoanion of 3 consists of a high-valent trinuclear-manganese (III)-substituted sandwiching polyoxoanion based on the [alpha-AsW{sub 9}O{sub 33}]{sup 9-} units. All the compounds are characterized by elemental analyses, IR, UV-vis spectra, TG-DTA and XRD analyses. The XPS and EPR spectra of Mn{sup III} in 3 were studied. The photocatalytic and electrocatalytic properties, as well as the stabilities of 1-3 were also investigated. - Graphical abstract: Three new transition-metal-containing polyoxotungstate hybrids were synthesized successfully under the ionothermal condition, which proves that the ionothermal synthesis is a suitable synthetic method for different kinds of polyoxometalates.
- OSTI ID:
- 21372483
- Journal Information:
- Journal of Solid State Chemistry, Vol. 183, Issue 2; Other Information: DOI: 10.1016/j.jssc.2009.11.016; PII: S0022-4596(09)00545-3; Copyright (c) 2009 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; ISSN 0022-4596
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
ANIONS
BROMIDES
DIFFERENTIAL THERMAL ANALYSIS
ELECTRON SPIN RESONANCE
LIGANDS
LIQUIDS
MANGANESE COMPLEXES
PHOTOCATALYSIS
SYNTHESIS
TUNGSTATES
ULTRAVIOLET SPECTRA
VISIBLE SPECTRA
WATER
X-RAY DIFFRACTION
X-RAY PHOTOELECTRON SPECTROSCOPY
BROMINE COMPOUNDS
CATALYSIS
CHARGED PARTICLES
COHERENT SCATTERING
COMPLEXES
DIFFRACTION
ELECTRON SPECTROSCOPY
FLUIDS
HALIDES
HALOGEN COMPOUNDS
HYDROGEN COMPOUNDS
IONS
MAGNETIC RESONANCE
OXYGEN COMPOUNDS
PHOTOELECTRON SPECTROSCOPY
REFRACTORY METAL COMPOUNDS
RESONANCE
SCATTERING
SPECTRA
SPECTROSCOPY
THERMAL ANALYSIS
TRANSITION ELEMENT COMPLEXES
TRANSITION ELEMENT COMPOUNDS
TUNGSTEN COMPOUNDS