| Emergence of supramolecular chirality by flows. | |
| | |
MedLine Citation:
|
PMID: 20979108 Owner: NLM Status: In-Process |
Abstract/OtherAbstract:
|
Hydrodynamic forces in stirred solutions induce chirality in some supramolecular species of J-aggregates, as detected at the level of the electronic transition. However, the mechanism that explains the phenomenon remains to be elucidated, although the basic effect of hydrodynamic gradients of the shear rate is most probably the folding or bending of the nanoparticles in solution. Herein, we demonstrate a correlation between chiral flows in different regions of circular and square stirred cuvettes and the emergence of true circular dichroism (CD). The results show that chaotic flows lead to a racemic mixture of chiral shaped supramolecular species, and vortical flows to scalemic mixtures. In a magnetically stirred flask the descending and ascending flows are of different chiral sign and the CD reading depends on the weighting of these two flows of inverse chiral sign. The effect of the gradient of shear rates of the flows leading to chiral shape objects depends on the shape of the cuvette, which suggests that the flask shape and the controlled addition of reagents in defined regions of the stirred solutions may exert a control in self-assembly processes. |
| | |
Authors:
|
Oriol Arteaga; Adolf Canillas; Joaquim Crusats; Zoubir El-Hachemi; Joan Llorens; Eduardo Sacristan; Josep M Ribo |
Related Documents
:
|
16090778 - Anisotropy of sheared carbon-nanotube suspensions. 20459198 - Time-resolved dpiv investigation of pulsatile flow in symmetric stenotic arteries--effe... 7749808 - Collagen-induced thrombus formation in flowing nonanticoagulated human blood from habit... 1271748 - Surface characteristics of normal and atherosclerotic human arteries including observat... 11752898 - Food deprivation decreases blood galanin-like peptide and its rapid entry into the brain. 8821878 - Cord lactate, ph, and blood gases from healthy neonates. |
Publication Detail:
|
Type: Journal Article |
Journal Detail:
|
Title: Chemphyschem : a European journal of chemical physics and physical chemistry Volume: 11 ISSN: 1439-7641 ISO Abbreviation: Chemphyschem Publication Date: 2010 Nov |
Date Detail:
|
Created Date: 2010-11-08 Completed Date: - Revised Date: - |
Medline Journal Info:
|
Nlm Unique ID: 100954211 Medline TA: Chemphyschem Country: Germany |
Other Details:
|
Languages: eng Pagination: 3511-6 Citation Subset: - |
Affiliation:
|
Departament de Física Aplicada i Ôptica and Institut de Nanociència i Nanotecnologia (IN2UB), Universitat de Barcelona, c. Martí i Franquès 1, 08028 Barcelona, Catalonia, Spain. |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
|
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: Alone in the dark? Modeling the conditions for visual experience in human fetuses.
Next Document: Variety in vegetable and fruit consumption and risk of bladder cancer in the European Prospective In...