ABSTRACT
Orthogonally tunable multicolor fluorescence including white-light emission was achieved using a dual-component molecular system. Under external acid/base stimuli, we were able to change the fluorescence of a mixture of two fluorescent molecular switches in an orthogonal and reversible manner, hence generate emission of multiple colors from blue to yellow, including white light (CIE (0.29, 0.34)).
ABSTRACT
The design of tunable dynamic self-assembly of nanoparticles with switchable assembled dimensions and morphologies is a challenging goal whose realization is vital for the evolution of smart nanomaterials. Herein, we report on chitosan polymer as an effective supramolecular "glue" for aldehyde-modified Au nanoparticles to reversibly modulate the states of self-assembled nanocomposites. By simultaneous integration of dynamic covalent Schiff base interactions and noncovalent hydrogen bonds, the chitosan/Au nanocomposites could reversibly transform their assembled morphologies from one-dimensional nanowires to three-dimensional nanosponges in response to the variation of pH value. Moreover, the obtained nanosponges could be used as an efficient pH-controlled cargo release system.
