(Nat. Commun.) Light-activated Photodeformable Supramolecular Dissipative Self-assemblies
作者：Chen, X.; Feng, W.; Bisoyi, H. K.; Zhang, S.; Chen, X.; Yang, H.*; Li, Q.*
關鍵字：Supramolecular Self-assembly
論文來源：期刊
具體來源：Nature Communications, 2022, 13, 3216.
發(fā)表時間：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.