2.

(a) UV–vis spectra of 1 (3.0 × 10^–4 M in toluene) upon heating at a rate of 1 K min^–1: (from red to blue) 298, 303, 308, 313, 318, 323, 328, 333, and 338 K. (b) Plot representing the degree of aggregation (α) as a function of temperature. All points were obtained from the UV–vis spectra presented in panel (a). (c) CD spectra of 1 (3.0 × 10^–4 M in toluene) at 298 K without stirring (black curve) and with stirring: (from a–g) 100, 200, 300, 500, 900, and 1000 rpm for CW (red curve) and CCW (blue curve) rotations. (d) LD spectra recorded in toluene at 298 K with stirring at 0 rpm (black curve), 100 rpm (blue curves), 500 rpm (green curves), and 1000 rpm (red curves) for CW (solid curves) and CCW (dashed curves) rotations. (e) CD responses recorded at 444 nm with stirring at 0 rpm (black curves) and 1000 rpm for CW (red curves) and CCW (blue curves) rotation.