Structural Colored Balloons Responsive to pH Change.
Structural colored balloons (SCBs) composed of poly(4-vinylpyridine-co-styrene) (P4VP-PS) exhibited a pH-controlled structural color change in the presence and absence of p-toluenesulfonic acid. The diameter of the SCBs increased and decreased under acidic and neutral conditions, respectively. The different colors exhibited at different pH values supposedly resulted from a change in the shell thickness not only due to the change in the diameter of the SCBs but also due to the uptake of p-toluenesulfonic acid to the pyridyl side chain of P4VP-PS.
Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University , Katsura, Nishikyo-ku, Kyoto 615-8510, Japan.|PRESTO, Japan Science and Technology Agency, Kawaguchi 332-0012, Japan.
Kenji
K
Higashiguchi
Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University , Katsura, Nishikyo-ku, Kyoto 615-8510, Japan.
Jun
J
Imai
Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University , Katsura, Nishikyo-ku, Kyoto 615-8510, Japan.
Kenji
K
Matsuda