Real time radioluminescence two-dimensional coatings have potential as dosemeters in proton and carbon therapeutic beams. We investigated coatings made of nano and micro-(C44H38P2)MnCl4 and (C38H36P2)MnBr4 crystals mixed with a water-equivalent substrate. The non-constant response of the radioluminescence signal of the coatings, as a function of linear energy transfer, along the Bragg curves presented a quenching effect, however, less prominent then what has been observed in our previous works using Al2O3:X (X=C and C,Mg) coatings. We hypothesize that this is a result of their lower crystal sizes and effective atomic number (Zeff). Combined experimental results and Monte Carlo simulations resulted in correction factors to address the linear energy transfer dependence and restore the constant dose–response for particle therapy beams. The quenching correction method was applied to the studied proton and carbon ion beams and yielded the best results for the nano-(C44H38P2)MnCl4, coating, followed by the micro-(C44H38P2)MnCl4, nano-(C38H36P2)MnBr4, and micro-(C38H36P2)MnBr4.