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Emission spectra of Chalc 2 doped contact lens, pH 8.0 buffer / methanol (2:1), with increasing concentrations of glucose (Top left) and corresponding spectra with increasing concentrations of fructose (Top right). λex = 460 nm. Intensity ratio plot for Chalc 2 doped contact lens towards both glucose and fructose (Bottom), where I and I’ are the intensities in the presence and absence of sugar respectively at λem max.
