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Caption : figure s1. differential thermal analysis (dta) of the reaction sri2 and kocn (1:1) in silica ampoule.

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Caption : figure s2. differential thermal analysis (dta) of the reaction bai2 and kocn (1:1) in silica ampoule. heating and cooling cycles are represented in red and blue respectively. 

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Caption : figure s3. differential scanning calorimetry (dsc) of α-bai(ocn) phase.

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Caption : figure s4. crystal structure refinement plot of eui(ocn) based on x-ray powder pattern data. green ticks mark bragg reflections relative to eui(ocn) and ki phase. the difference curve (blue) highlights the difference between observed (red) and calculated pattern (black).

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Caption : figure s5. crystal structure refinement plot of bai(ocn) based on x-ray powder pattern data. green ticks mark bragg reflections relative to bai(ocn) and ki phase. the difference curve (blue) highlights the difference between observed (red) and calculated pattern (black).

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Caption : figure s6. powder x-ray patterns of the products obtained at different temperatures of solid-state reaction of sri2 with kocn (1:1).

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Caption : figure s7. powder x-ray patterns of the products obtained at different temperatures of solid-state reaction of eui2 with kocn (1:1).

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Caption : figure s8. powder x-ray patterns of the products obtained at different temperatures of solid-state reaction of bai2 with kocn (1:1).

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Caption : figure s9. ftir spectra of α-bai(ocn) (sg: pnma) and β-bai(ocn) (sg: cmcm) compounds.

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Caption : figure s10. fourier transform infrared spectrum of mi(ocn) compounds.

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Caption : figure s11. excitation (red) and emission spectra (black) of eu2+ (2%)-doped β-bai(ocn) compound.



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Caption : figure s12. decay curve of β-bai(ocn): eu2+recorded for the europium blue transition at 431 nm.