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Folding and Hydrodynamic Forces in J‐Aggregates of 5‐Phenyl‐10,15,20‐tris(4‐sulfophenyl)porphyrin
Author(s) -
Escudero Carlos,
Crusats Joaquim,
DíezPérez Ismael,
ElHachemi Zoubir,
Ribó Josep M.
Publication year - 2006
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.200603182
Subject(s) - porphyrin , folding (dsp implementation) , tris , chemistry , photochemistry , engineering , structural engineering , biochemistry
Stir it up! Comparison of the evolution with time of J‐aggregates of the title porphyrin in stagnant and vortex‐stirred solutions showed that chiral‐sign selection is due to the action of hydrodynamic gradients (shear flows) on particle folding. Brownian dynamics (stagnant solution) result in irregularly folded mesophases, whereas hydrodynamic gradients (vortex stirring) lead to long‐order folding and formation of helical ribbons (see picture).