writer：Chen, X.; Feng, W.; Bisoyi, H. K.; Zhang, S.; Chen, X.; Yang, H.*; Li, Q.*
keywords：Supramolecular Self-assembly
source：期刊
specific source：Nature Communications, 2022, 13, 3216.
Issue time：2022年

Dissipative self-assembly, one of fundamentally important out-of-equilibrium self-assembly

systems, can serve as a controllable platform to exhibit temporal processes for various nonstimulus

responsive properties. However, construction of light-fueled dissipative selfassembly

structures with transformable morphology to modulate non-photoresponsive

properties remains a great challenge. Here, we report a light-activated photodeformable

dissipative self-assembly system in aqueous solution as metastable fluorescent palette.

Zwitterionic sulfonato-merocyanine is employed as a light-induced amphiphile to coassemble

with polyethyleneimine after light irradiation. The formed spherical nanoparticles

spontaneously transform into cuboid ones in the dark with simultaneous variation of the

particle sizes. Then the two kinds of nanoparticles can reversibly interconvert to each other

by periodical light irradiation and thermal relaxation. Furthermore, after loading different

fluorophores exhibiting red, green, blue emissions and their mixtures, all these fluorescent

dissipative deformable nanoparticles display time-dependent fluorescence variation with

wide range of colors. Owing to the excellent performance of photodeformable dissipative

assembly platform, the light-controlled fluorescence has achieved a 358-fold enhancement.

Therefore, exposing the nanoparticles loaded with fluorophores to light in a spatially controlled

manner allows us to draw multicolored fluorescent images that spontaneously disappeared

after a specific period of time.