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- Title
Stable and Unstable Concentration Oscillations Induced by Temperature Oscillations on Reversible Nonequilibrium Chemical Reactions of Helicene Oligomers.
- Authors
Zhang, Sheng; Bao, Ming; Arisawa, Mieko; Yamaguchi, Masahiko
- Abstract
Temperature oscillations can affect behaviors of living things. In this article, we describe the effect of triangle temperature oscillations on reversible nonequilibrium chemical reactions detected as concentration oscillations. When amplification through self-catalytic reactions is involved in the chemical reactions, concentration oscillations exhibit diverse nonequilibrium phenomena, which include equilibrium intersecting, equilibrium noncontact, and equilibrium sliding. Both stable and unstable concentration oscillations occur, during which repeated cycles provide the same and different concentration oscillations, respectively. Concentration oscillations are classified according to their waveforms in concentration/time profiles, the shapes of hysteresis curves in concentration/temperature profiles, the nature of self-catalytic reactions, and their relationships with equilibrium. An unstable concentration oscillation may be transformed into a stable concentration oscillation, which is described on the basis of the classifications. Experimental examples are shown using reversible association and dissociation reactions of helicene oligomers.
- Subjects
NON-equilibrium reactions; CHEMICAL reactions; OSCILLATIONS; OLIGOMERS; TRIANGLES; TEMPERATURE effect; CURVES
- Publication
International Journal of Molecular Sciences, 2023, Vol 24, Issue 1, p693
- ISSN
1661-6596
- Publication type
Article
- DOI
10.3390/ijms24010693