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How to make KMnO4 Mn 2 transparent to red? 


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To make KMnO4 Mn 2 transparent to red, one can utilize the preparation methods described in the provided research contexts. Context_1 details a process involving dissolving KMnO4 in an HF solution to obtain a K2MnF6 precursor, which can lead to a red fluorescent material when further processed. Context_2 presents a method using KMnO4 in a water solution to prepare a tetravalent manganese ion doped ammonium salt red light material. Additionally, Context_4 discusses a green preparation method for Mn (IV) doped fluoride red fluorescence powder, where KMnO4 is involved in the reaction process. By following these methods, which involve KMnO4 and other specific compounds, it is possible to create transparent to red materials with manganese doping, suitable for various applications requiring red light emission.

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By acid treating LiMn2O4 thin film, λ-MnO2 thin film was prepared, showing electrochromism from reddish brown to transparent by applying voltage, as detailed in the research paper.
By controlling the number of MnO2 nanosheet deposition cycles, the optical density of the film can be adjusted, allowing for transparency to red light through the reduction of Mn4+ to Mn2+.
To make KMnO4 Mn2 transparent to red, dissolve KMnO4 in HF solution, mix with fluoride solution, add H2O2 for precipitation, age, and dry to obtain K2MnF6 precursor.
Not addressed in the paper.

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