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Published on: August 7, 2018
An Imidazole-Functionalized Polyoxovanadate with a Classical {V18O42} Core and Its Photothermal Conversion Behavior
Di Zhang1, Ziling Wu1, Xuemin Yang1
1College of Chemistry and Chemical Engineering, Shandong Provincial Key Laboratory of Intelligent Molecular Science and Engineering, Qingdao University, Qingdao 266071, China.
Researchers synthesized a novel imidazole-functionalized polyoxovanadate cage ({V18O42} core) for the first time. This new mixed-valence material shows excellent photothermal conversion capabilities, expanding possibilities for advanced functional materials.
Area of Science:
- Inorganic Chemistry
- Materials Science
- Supramolecular Chemistry
Background:
- The {V18O42} cage is a key polyoxovanadate (POV) structure with tunable V(IV)/V(V) ratios.
- Organic functionalization of the {V18O42} cage is underexplored, limiting its potential applications.
Purpose of the Study:
- To synthesize and structurally characterize an organic-functionalized {V18O42} cage.
- To investigate the photothermal conversion properties of the novel compound.
Main Methods:
- Single-crystal X-ray diffraction for structural determination.
- Bond valence sum and X-ray photoelectron spectroscopy for valence state analysis.
- UV-Vis spectroscopy and photothermal conversion experiments under 660 nm irradiation.
Main Results:
- Synthesis and structural characterization of H[(VO)(mIM)4]4[V18O42(Cl)]·13H2O (V22-mIM), the first organic-functionalized {V18O42} cage.
- Confirmation of a mixed-valence state with 18 V(IV) and 4 V(V) centers.
- Demonstration of broad visible-light absorption and pronounced photothermal conversion in solution and solid states with stable cycling.
Conclusions:
- This work presents the first structurally defined organic-functionalized {V18O42} cage.
- The mixed-valence polyoxovanadate exhibits efficient photothermal conversion, highlighting its potential as a molecular platform for such applications.
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