Oscillations and multi stability in organic reactions of prebiotic relevance

• Grant number: 17/22387-5
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• Effective date (Start): March 01, 2018
• Effective date (End): February 28, 2019
• Field of knowledge: Physical Sciences and Mathematics - Chemistry - Physical-Chemistry
• Principal Investigator: Raphael Nagao de Sousa
• Grantee: Bianca Tieme Kitagaki
• Host Institution: Instituto de Química (IQ). Universidade Estadual de Campinas (UNICAMP). Campinas , SP, Brazil
• Associated research grant: 16/01817-9 - Design and control of self-organized electrochemical patterns, AP.JP

Abstract

Complex kinetics express in the form of oscillations, multistability and excitability in reaction-diffusion systems can be easily observed in inorganic chemical reactions. As the most common example, the reaction of Belousov-Zhabotinsky, whose constitution is based essentially on bromine salts. Several reactions, in which the central oscillators belong to the families of inorganic elements; for example: iodide, iodate, periodate, chlorite, chlorate, permanganate and etc, also exhibit complex dynamic behavior. On the other hand, of great importance and little studied, organic chemical reactions may be susceptible to the emergence of spatio-temporal self-organization when feedback cycles are present in the reaction mechanism. The remarkable characteristic of this class of reactions is the possibility of synthesizing supramolecular structures in conditions that are far from the thermodynamic equilibrium, which have a strong relevance in the understanding of the origin of life. The present project has as objective to monitor the influence of easily adjustable experimental parameters on the oscillatory dynamics of thiol-thioester-amide system by means of the factorial planning. The experiments will be conducted in continuously stirred tank reactor under precise control of the inflow and outflow. Emphasis will be given on the attribution of relations of the chemometric analyzes to the dynamic behavior in order to control the oscillatory period. (AU)

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

KITAGAKI, BIANCA T.; PINTO, MARIA R.; QUEIROZ, ADRIANA C.; BREITKREITZ, MARCIA C.; ROSSI, FEDERICO; NAGAO, RAPHAEL. Multivariate statistical analysis of chemical and electrochemical oscillators for an accurate frequency selection. Physical Chemistry Chemical Physics, v. 21, n. 30, p. 16423-16434, AUG 14 2019. (17/05592-4, 17/22387-5, 16/01817-9, 17/11986-5)