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The molar absorptivity of the small molecule NB-azide and CMR-azide moieties was determined using UV-Vis spectrophotometry. The light absorbance of NB-azide and CMR-azide moieties in the wavelengths of interest are shown in the shaded regions: long-wavelength UV (365 nm, purple line) and visible blue light (400 – 500 nm, blue region).
