The Supporting Information includes details on absorption measurements, absorption spectra, size and concentration calculations, details on luminescence measurements, luminescence spectra, raw isothermal titration calorimetry plots, example raw 1 H NMR spectra, example NMR fitting spectra, investigation of NMR contaminations, NMR titrations spectra, raw X-ray diffraction spectra, example X-ray diffraction spectrum fitting, X-ray diffraction measurements of dry indium phosphide quantum dots after treatment with zinc chloride and subsequent