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Title: Kinetic control of the supramolecular chirality of porphyrin J-aggregates
Author: Sorrenti, Alessandro
El Hachemi, Zoubir
Arteaga Barriel, Oriol
Canillas i Biosca, Adolf
Crusats i Aliguer, Joaquim
Ribó i Trujillo, Josep M.
Keywords: Quiralitat
Química supramolecular
Supramolecular chemistry
Issue Date: 9-Jun-2012
Publisher: Wiley-VCH
Abstract: The aggregation of achiral sulfonatophenyl- and phenyl-meso-substituted diprotonated porphyrins to chiral J-aggregates is a hierarchical noncovalent polymerization process preceded by a critical nucleation stage. This allows significant enantiomeric excesses by the formation of a few primary nuclei and the control of their growth by the effect that flows (imperfect mixing) have on the secondary nucleation of the J-aggregate particles. In addition, the results strongly suggest that when only one species of aggregate predominates, the CD signals of the three excitonic bands in the visible region (around 420, 490, and 700 nm) show the same sign. Thus, differences on their relative sign would be due to the presence of different species.
Note: Versió postprint del document publicat a:
It is part of: Chemistry-A European Journal, 2012, vol. 18, num. 28, p. 8820-8826
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ISSN: 0947-6539
Appears in Collections:Articles publicats en revistes (Química Inorgànica i Orgànica)

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