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Viedma Molero, Cristóbal ; Noorduin, Wim L. ; Ortiz Menéndez, José Eugenio ; Torres, Trinidad ; Cintas Moreno, Pedro | Royal Society of Chemistry | 2011A straightforward unprecedented sublimation protocol that reveals both conversion of a racemic compound into a racemic conglomerate and subsequent enantioenrichment has been developed for the proteinogenic amino acid valine. The phenomenon has b[...]texto impreso
We report experimental results that show a large and symmetric population of D and L crystals moving into complete chiral purity, with one of the enantiomers completely disappearing. The results indicate (i) a new symmetry breaking process incom[...]texto impreso
Chirality plays a pivotal role in contemporary science as it represents a distinctive feature found in molecules and crystals. This chapter constitutes an excursion into solid-state chemistry from historical foundations, following the seminal di[...]texto impreso
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Viedma Molero, Cristóbal ; Ortiz Menéndez, José Eugenio ; Torres Pérez-Hidalgo, Trinidad José de ; Cintas Moreno, Pedro | Royal Society of Chemistry | 2012A real amplification of an initial enantiomeric excess can be detected when two amino acids are sublimed at high temperature, even if one of the components is a racemic compound that does not convert into a conglomerate by sublimationtexto impreso
Sivakumar, Reajean ; Kwiatoszynski, Julien ; Fouret, Amaury ; Nguyen, Thi Phuong Thao ; Ramrup, Parsram ; Cheung, Pui Shan Monica ; Cintas, Pedro ; Viedma Molero, Cristóbal ; Cuccia, Louis A. | ACS Publications (American Chemical Society) | 2016-05Oriented attachment, a non-classical crystallization phenomenon, describes the spontaneous self-assembly of adjoining crystals with common crystallographic orientations. Introducing chiral recognition between crystals during oriented attachment [...]texto impreso
Amino acids in living systems consist almost exclusively of the L-enantiomer. How and when this homochiral characteristic of life came to be has been a matter of intense investigation for many years. Among the hypotheses proposed to explain the [...]texto impreso
Prieto Rubio, Manuel ; Viedma Molero, Cristóbal ; López-Acevedo Cornejo, Victoria ; Martín-Vivaldi Caballero, Juan Luis ; López Andrés, Sol | Sociedad Española de Mineralogía | 1987La evaluación de la sobresaturación es un requisito esencial a la hora de describir, comparar e interpretar experiencias de crecimiento cristalino. Sin embargo, en el caso del crecimiento de cristales en geles, las experiencias se describen aten[...]texto impreso
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Márquez González, Álvaro ; Pablo Hernández, Miguel Ángel de ; Oyarzun, Roberto ; Viedma Molero, Cristóbal | Elsevier Science B.V., Amsterdam | 2005The discovery of gullies on Mars suggests liquid water activity near the surface of the planet in recent times. Since liquid water is unstable under the present-day P–T martian conditions, the formation mechanisms of the gullies, and the source [...]texto impreso
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Chiral symmetry breaking in stirredcrystallization of sodium chlorate (NaClO3) is believedto occur via nucleation of a single chiral ‘‘mother crystal’’ that produces a new generation of crystals which inherit its chirality. We here report result[...]texto impreso
Formation of peptide bonds was attempted by thermal activation of dry amino acids from aqueous solution that simulated prebiotic evaporative environments. The evaporation trend of amino acids solutions shows a bifurcation and can lead to either [...]texto impreso
Oyarzun, Roberto ; Viedma Molero, Cristóbal ; Márquez González, Álvaro ; Lillo Ramos, F. Javier | Blackwell Publishing Ltd | 2003A mudflow-like deposit resting on the bottom of the East Gorgonum Crater (Mars; 37.4S, 168.0W) may provide new insight regarding the debate on the existence of water over the Martian surface. Because water in a mudflow is confined to a porous me[...]
