Please use this identifier to cite or link to this item:
http://hdl.handle.net/2445/171100
Title: | Reversible mechanical induction of optical activity in solutions of soft-matter nanophases |
Author: | Arteaga Barriel, Oriol Escudero Rodríguez, Carlos Oncins Marco, Gerard El Hachemi, Zoubir Llorens Llacuna, Joan Crusats i Aliguer, Joaquim Canillas i Biosca, Adolf Ribó i Trujillo, Josep M. |
Keywords: | Porfirines Quiralitat Porphyrins Chirality |
Issue Date: | 2-Nov-2009 |
Publisher: | Wiley-VCH |
Abstract: | Nanophases of J-aggregates of several achiral amphiphilic porphyrins, which have thin long acicular shapes (nanoribbons), show the immediate and reversible formation of a stationary mechano-chiral state in the solution by vortex stirring, as detected by their circular dichroic signals measured by 2-modulator generallized ellipsometry. The results suggest that when a macroscopic chiral force creates supramolecular chirality, it also creates an enantiomeric excess of screw distortions, which may be detected by their excitonic absorption. An explanation on the effect of the shear flow gradients is proposed on the basis of the orientation of the rotating particles in the vortex and the size, shape, and mechanical properties of the nanoparticles. |
Note: | Versió postprint del document publicat a: https://doi.org/10.1002/asia.200900254 |
It is part of: | Chemistry-An Asian Journal, 2009, vol. 4, num. 11, p. 1687-1696 |
URI: | http://hdl.handle.net/2445/171100 |
Related resource: | https://doi.org/10.1002/asia.200900254 |
ISSN: | 1861-4728 |
Appears in Collections: | Articles publicats en revistes (Física Aplicada) Articles publicats en revistes (Química Inorgànica i Orgànica) Articles publicats en revistes (Enginyeria Química i Química Analítica) |
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