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Activation Energy of Aggregation-Disaggregation Self-Oscillation of Polymer Chain
Nanosystem Research Institute, NRI, National Institute of Advanced Science and Technology, AIST, Central 5-2, 1-1-1 Higashi, Tsukuba 305-8565, Japan
* Author to whom correspondence should be addressed.
Received: 8 November 2012; in revised form: 25 November 2012 / Accepted: 30 November 2012 / Published: 3 December 2012
Abstract: In this paper, we investigated the activation energies of the aggregation–disaggregation self-oscillation induced by the Belousov-Zhabotinsky (BZ) reaction by utilizing the nonthermoresponsive polymer chain in a wide temperature range. This is because the conventional type self-oscillating polymer chain, with thermoresponsive poly(Nisopropylacrylamide) (poly(NIPAAm) main-chain covalently bonded to the ruthenium catalyst (Ru(bpy)3) of the BZ reaction, cannot evaluate the activation energy over the lower critical solution temperature (LCST). The nonthermoresponsive self-oscillating polymer chain is composed of a poly-vinylpyrrolidone (PVP) main-chain with the ruthenium catalyst (Ru(bpy)3). As a result, we clarified that the activation energy of the aggregation–disaggregation self-oscillation of the polymer chain is hardly affected by the concentrations of the BZ substrates. In addition, the activation energy of the nonthermoresponsive self-oscillating polymer chain was found to be almost the same value as normal BZ reaction, i.e., not including the self-oscillating polymer system with Ru moiety.
Keywords: self-oscillation; polymer chain; BZ reaction; molecular robot
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MDPI and ACS Style
Hara, Y.; Jahan, R.A. Activation Energy of Aggregation-Disaggregation Self-Oscillation of Polymer Chain. Int. J. Mol. Sci. 2012, 13, 16281-16290.
Hara Y, Jahan RA. Activation Energy of Aggregation-Disaggregation Self-Oscillation of Polymer Chain. International Journal of Molecular Sciences. 2012; 13(12):16281-16290.
Hara, Yusuke; Jahan, Rumana A. 2012. "Activation Energy of Aggregation-Disaggregation Self-Oscillation of Polymer Chain." Int. J. Mol. Sci. 13, no. 12: 16281-16290.