Fig. 3
Characterization of co-assembled system from 1•3. a Ultraviolet–visible (UV‒Vis) transmittance spectra of 1 and 1•3 in pure water (5.00 × 10−5 M for each compound). Inset: images of 1 and 1•3 in pure water (5.00 × 10−5 M for each compound). b UV‒Vis spectra of 1, 3, and complex 1•3 (0.05 mM for each compound) in water/MeOH (90:10, v/v). Inset: molar ratio plot for complex 1•3, by monitoring the absorption intensity at 480 nm. c Degree of aggregation (αagg) as a function of MeOH volume fraction monitored at 480 nm. The red line denotes the mathematical fitting of the curve according to the solvent-dependent equilibrium model (see Eqs. (1) and (2) in “Methods”). Inset: solvent-dependent UV–Vis absorption spectra of 1•3 [5.0 × 10−5 M for each compound in water/MeOH (from 90:10 to 65:35, v/v)]. The arrow indicates the spectral changes upon increasing the MeOH fraction. d Transmission electron microscopic image recorded on a copper grid by drop-casting complex 1•3 (5.00 × 10−5 M for each compound in water). Scale bar: 500 nm
