Figure 3.

Liquid-physical properties of 1–5. (a) Variation of storage elastic modulus (G′, square), viscous loss modulus (G″, triangle) (left) and complex viscosity (ƞ*, circle) (right) as a function of angular frequency (ω) for neat samples of 1 (red), 2 (pink), 3 (green), 4 (black) and 5 (blue) with a strain amplitude (γ) = 0.25 at 25 °C. The viscosities are ordered as: 3 > 4 > 5 ≥ 1 > 2. (b) ƞ* as a function of temperature. γ = 0.25, ω = 10 rad s⁻¹. Solid-state ¹³C NMR spectra, (c) CP-MAS and (d) DD-MAS mode of 1 (red), 2 (pink), 3 (green), 4 (black) and 5 (blue) measured at 27 °C. The intensity of CP-MAS follows an order of 3 > 4 > 5 ≥ 1 > 2 while the intensity of DD-MAS is on an order of 3 < 4 < 5 < 1 < 2.