Selective Chiral Symmetry Breaking during Crystallization: Parity Violation or Cryptochiral Environment in Control?

We have attempted to check experimentally whether the parity violating energy difference (PVED) between enantiomers is ultimately responsible for any bias in the final homochirality of crystals, after suitable autocatalytic amplification. When two equivalent (50-50) chiral populations of L- and D-cr...

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Detalles Bibliográficos
Autor: Viedma Molero, Cristóbal
Tipo de recurso: artículo
Fecha de publicación:2007
País:España
Institución:Universidad Complutense de Madrid (UCM)
Repositorio:Docta Complutense
Idioma:inglés
OAI Identifier:oai:docta.ucm.es:20.500.14352/52804
Acceso en línea:https://hdl.handle.net/20.500.14352/52804
Access Level:acceso abierto
Palabra clave:548.5
Crystallization
Parity
Cryptochiral
Cristalografía (Geología)
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spelling Selective Chiral Symmetry Breaking during Crystallization: Parity Violation or Cryptochiral Environment in Control?Viedma Molero, Cristóbal548.5CrystallizationParityCryptochiralCristalografía (Geología)We have attempted to check experimentally whether the parity violating energy difference (PVED) between enantiomers is ultimately responsible for any bias in the final homochirality of crystals, after suitable autocatalytic amplification. When two equivalent (50-50) chiral populations of L- and D-crystals (of either NaClO3 or NaBrO3) generated independently are mixed and undergo dissolution-crystallization, one of the chiral populations disappears randomly in an irreversible autocatalytic competition process that nurtures the other population. If enough experiments are carried out with this 50-50 mixture of chiral crystals, a random distribution of solutions with final L- or D- crystals is obtained in total. However, when the two populations of L- and D-crystals are generated together in the same solution and undergo a dissolution-crystallization process, a nonrandom distribution of the final handedness among different homochiral solutions is obtained. This selective symmetry breaking is sporadic although always in the same direction; thus, we discard any explanation based on PVED effects. We conclude that the result represents an experimental demonstration of selective chiral symmetry breaking on a macrocopic level brought about by cryptochiral environmental impurity.American Chemical SocietyUniversidad Complutense de Madrid20072007-01-0120072007-01-01journal articlehttp://purl.org/coar/resource_type/c_6501info:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/20.500.14352/52804reponame:Docta Complutenseinstname:Universidad Complutense de Madrid (UCM)Inglésengopen accesshttp://purl.org/coar/access_right/c_abf2info:eu-repo/semantics/openAccessoai:docta.ucm.es:20.500.14352/528042026-06-02T12:44:21Z
dc.title.none.fl_str_mv Selective Chiral Symmetry Breaking during Crystallization: Parity Violation or Cryptochiral Environment in Control?
title Selective Chiral Symmetry Breaking during Crystallization: Parity Violation or Cryptochiral Environment in Control?
spellingShingle Selective Chiral Symmetry Breaking during Crystallization: Parity Violation or Cryptochiral Environment in Control?
Viedma Molero, Cristóbal
548.5
Crystallization
Parity
Cryptochiral
Cristalografía (Geología)
title_short Selective Chiral Symmetry Breaking during Crystallization: Parity Violation or Cryptochiral Environment in Control?
title_full Selective Chiral Symmetry Breaking during Crystallization: Parity Violation or Cryptochiral Environment in Control?
title_fullStr Selective Chiral Symmetry Breaking during Crystallization: Parity Violation or Cryptochiral Environment in Control?
title_full_unstemmed Selective Chiral Symmetry Breaking during Crystallization: Parity Violation or Cryptochiral Environment in Control?
title_sort Selective Chiral Symmetry Breaking during Crystallization: Parity Violation or Cryptochiral Environment in Control?
dc.creator.none.fl_str_mv Viedma Molero, Cristóbal
author Viedma Molero, Cristóbal
author_facet Viedma Molero, Cristóbal
author_role author
dc.contributor.none.fl_str_mv Universidad Complutense de Madrid
dc.subject.none.fl_str_mv 548.5
Crystallization
Parity
Cryptochiral
Cristalografía (Geología)
topic 548.5
Crystallization
Parity
Cryptochiral
Cristalografía (Geología)
description We have attempted to check experimentally whether the parity violating energy difference (PVED) between enantiomers is ultimately responsible for any bias in the final homochirality of crystals, after suitable autocatalytic amplification. When two equivalent (50-50) chiral populations of L- and D-crystals (of either NaClO3 or NaBrO3) generated independently are mixed and undergo dissolution-crystallization, one of the chiral populations disappears randomly in an irreversible autocatalytic competition process that nurtures the other population. If enough experiments are carried out with this 50-50 mixture of chiral crystals, a random distribution of solutions with final L- or D- crystals is obtained in total. However, when the two populations of L- and D-crystals are generated together in the same solution and undergo a dissolution-crystallization process, a nonrandom distribution of the final handedness among different homochiral solutions is obtained. This selective symmetry breaking is sporadic although always in the same direction; thus, we discard any explanation based on PVED effects. We conclude that the result represents an experimental demonstration of selective chiral symmetry breaking on a macrocopic level brought about by cryptochiral environmental impurity.
publishDate 2007
dc.date.none.fl_str_mv 2007
2007-01-01
2007
2007-01-01
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://hdl.handle.net/20.500.14352/52804
url https://hdl.handle.net/20.500.14352/52804
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv American Chemical Society
publisher.none.fl_str_mv American Chemical Society
dc.source.none.fl_str_mv reponame:Docta Complutense
instname:Universidad Complutense de Madrid (UCM)
instname_str Universidad Complutense de Madrid (UCM)
reponame_str Docta Complutense
collection Docta Complutense
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,300719

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