Fig. 2. Fluorescence spectra of TPDC (A), TPPDC (B), PPDC (C) in DMSO/water mixtures with different volume fractions of water at a concentration of 10 μM. The excitation wavelengths for (A), (B) and (C) are 400, 390, 420 nm, respectively. The insets show photographs of the compounds in DMSO and DMSO : water (v : v, 1 : 99) under UV light (365 nm) illumination.
