Josep Maria Ribó

Membrane Semi‐Permeability and Ion Selectivity in Chemiosmosis: Open Systems Volume Dependence of Electrolyte Chemistry

Josep Maria Ribó, Isabel Herreros, David Hochberg, Federico Morán et autres

ABSTRACT The effect of pH changes in external ionic solutions on liposomes entrapping non‐permeable weak acid/base pairs was simulated using a simple “toy” model. Membrane semi‐permeability and selective passive diffusion lead to internal stationary states that inevitably exhibit electroneutrality breaking. The resulting …

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Supporting Information: Beyond Conglomerates: A Minimalist Model of the Viedma Deracemization of dl-Amino Acids

Jean Claude Micheau, Thomas Buhse, Pedro Cintas, José E. Ortíz et autres

Graphical representations of the model under equilibrium and nonequilibrium conditions, simulation conditions and parameters with additional representations, physicochemical properties of aspartic acid and valine, experimental protocols (PRXD and chiral HPLC acquisition data)

Beyond Conglomerates: A Minimalist Model of the Viedma Deracemization of dl -Amino Acids

Jean Claude Micheau, Thomas Buhse, Pedro Cintas, José E. Ortíz et autres

A comprehensive kinetic rate equation model is proposed for a better understanding of the Viedma deracemization of dl -amino acids. This model includes monomer plus cluster and cluster plus cluster growth, and involves both homochiral and heterochiral interactions. Our approach employs a …

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Spontaneous Mirror‐Symmetry Breaking Destabilizes Racemates: A Route to Homochirality and Reversed Chemical Selectivity

Josep Maria Ribó, Jean Claude Micheau, Thomas Buhse

Several models and experiments yielding to spontaneous mirror-symmetry breaking (SMSB) have been revisited. It is concluded that all show first-order autocatalytic dynamics for the emergence of an enantiomeric excesses (ee). However, first-order autocatalysis is by itself unable to lead to SMSB. Therefore, …

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Viedma deracemization mechanisms in self-assembly processes

Josep Maria Ribó, David Hochberg, Thomas Buhse, Jean Claude Micheau

Simulations on an ODE-based model shows that there are many common points between Viedma deracemization and chiral self-assemblies of achiral building blocks towards chiral nanoparticles. Both systems occur in a closed system with energy exchange but no matter exchange with the surroundings …

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In Memoriam: David Hochberg February 3, 1957–December 30, 2023

Celia Blanco, Thomas Buhse, Pedro Cintas, Isabel Herreros et autres

Physical Chemistry Models for Chemical Research in the XXth and XXIst Centuries

Josep Maria Ribó, David Hochberg

Thermodynamic hypotheses and models are the touchstone for chemical results, but the actual models based on time-invariance, which have performed efficiently in the development of chemistry, are nowadays invalid for the interpretation of the behavior of complex systems exhibiting nonlinear kinetics and …

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Corrigendum: The Coordinate Reaction Model: An Obstacle to Interpreting the Emergence of Chemical Complexity

Josep Maria Ribó, David Hochberg

In the published article, the term “invariance” appears in some places instead of “variance” that made confusing and erroneous the meaning of the text. Specifically: Page 13104, second column the title of the section should be; “General evolution criterion as a consequence …

Chiral selectivity vs. noise in spontaneous mirror symmetry breaking

David Hochberg, Thomas Buhse, Jean Claude Micheau, Josep Maria Ribó

Imperfect bifurcation (blue curves) due to chiral bias g > 0 with chiral noise ξ induced by temperature fluctuations. Axis α = ([L] − [D])/2; λ is a nonequilibrium constraint on the system (a flow rate). Chiral selectivity holds when g > …

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Spontaneous Emergence of Chirality in Autocatalytic Cycle Models of the Soai Reaction

Thomas Buhse, María E. Noble‐Terán, David Hochberg, Josep Maria Ribó et autres

The Soai reaction appears as an energy dissipative system thanks both to the typical round-by-round methodology which is an approximation of an open reactor and to the high exergonicity of the reaction of dialkylzinc with the carbaldehyde. It has been found that …

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Resilience of parity-violation-induced chiral selectivity to nonequilibrium temperature fluctuations in open systems

David Hochberg, Thomas Buhse, Jean Claude Micheau, Josep Maria Ribó

We consider the sensitivity of chemical reactions, able to undergo spontaneous mirror symmetry breaking, to chiral bias in the presence of nonequilibrium temperature fluctuations and derive a selectivity criterion. For this, we estimate the magnitude of fluctuations $\ensuremath{\delta}k$ in chemical reaction rate …

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Stoichiometric network analysis in reaction networks yielding spontaneous mirror symmetry breaking in a prebiotic atmosphere

Rubén Danilo Bourdon-García, Jesús A. Ágreda, Javier D. Burgos-Salcedo, David Hochberg et autres

Stoichiometric network analysis (SNA) was used to study the spontaneous mirror symmetry breaking of several models based on the Kondepudi–Nelson model and the Strecker reaction, under atmosphere conditions and energy sources of the primitive earth.

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