Nanosystem Research Institute, NRI, National Institute of Advanced Science and Technology, AIST, Central 5-2, 1-1-1 Higashi, Tsukuba 305-8565, Japan.
Sensors (Basel). 2014 Jan 15;14(1):1497-510. doi: 10.3390/s140101497.
We investigated the self-oscillating behaviors of two types of polymer chains induced by the Belousov-Zhabotinsky (BZ) reaction. One consisted of N-isopropylacrylamide (NIPAAm) and the Ru catalyst of the BZ reaction, and the other consisted of NIPAAm, the Ru catalyst, and acrylamide-2-methylpropanesulfonic acid (AMPS) with a negatively charged domain as a solubility control site. A comparison of the two types of self-oscillation systems showed that the anionic AMPS portion of the polymer chain significantly affected the self-oscillating behavior under strongly acidic condition. The periods of self-oscillation for the two types of self-oscillating polymer chains were investigated by changing the initial concentrations of the three BZ substrates and the temperature. As a result, it was demonstrated that the period of self-oscillation could be controlled by the concentration of the BZ substrates and the temperature. Furthermore, the activation energies of the two types of the self-oscillating polymer chains gave similar values as normal BZ reactions, i.e., not including the self-oscillating polymer system with a Ru moiety. In addition, it was clarified the activation energy was hardly affected by the initial concentration of the three BZ substrates.
我们研究了两种类型的聚合物链的自激振荡行为，这两种聚合物链由 Belousov-Zhabotinsky（BZ）反应引发。一种由 N-异丙基丙烯酰胺（NIPAAm）和 BZ 反应的 Ru 催化剂组成，另一种由 NIPAAm、Ru 催化剂和带有负电荷域的丙烯酰胺-2-甲基丙烷磺酸（AMPS）组成，作为溶解度控制位点。两种自激振荡系统的比较表明，聚合物链中的阴离子 AMPS 部分显著影响在强酸性条件下的自激振荡行为。通过改变三种 BZ 底物的初始浓度和温度来研究两种自激振荡聚合物链的自激振荡周期。结果表明，自激振荡周期可以通过 BZ 底物的浓度和温度来控制。此外，两种自激振荡聚合物链的活化能给出了与正常 BZ 反应相似的值，即不包括带有 Ru 部分的自激振荡聚合物体系。此外，还阐明了活化能几乎不受三种 BZ 底物初始浓度的影响。
