Fig. 4: Aurophilic interaction-caused aggregation.
a Emission spectra of 2b in pure DCM and a mixed solvent of DCM/n-hexane with different volume fractions. c = 1 × 10−5 M. λex = 365 nm. Left axis: emission intensity of solution (arb. units). Right axis: emission intensity of crystals in solid (arb. units). b Temperature-dependent UV-Vis absorption spectral changes of 2b from 286 to 316 K (c = 1 × 10−5 M, CHCl3/n-hexane v/v = 6:94). Inset: the fitting curve of the isodesmic aggregation model calculated by the absorbance at 420 nm. Blue star: Absorbance data at 420 nm at different temperatures.
