Supramolecular Chirality in Organogels: A Detailed Spectroscopic, Morphological, and Rheological Investigation of Gels (and Xerogels) Derived from Alkyl Pyrenyl Urethanes

This Article addresses the formation of chiral supramolecular structures in the organogels derived from chiral organogelator 1 R (or 2 R ), and its mixtures with its enantiomer (1 S ) and achiral analogue 3 by extensive circular dichroism (CD) spectroscopic measurements. Morphological analysis by at...

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Bibliographic Details
Published in:Langmuir 2010-10, Vol.26 (20), p.16141-16149
Main Authors: Das, Rajat K, Kandanelli, Ramesh, Linnanto, Juha, Bose, Kunal, Maitra, Uday
Format: Article
Language:English
Subjects:
Chemistry
Exact sciences and technology
General and physical chemistry
Materials: Nano-and Mesostructured Materials, Polymers, Gels, Liquid Crystals, Composites
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Summary:This Article addresses the formation of chiral supramolecular structures in the organogels derived from chiral organogelator 1 R (or 2 R ), and its mixtures with its enantiomer (1 S ) and achiral analogue 3 by extensive circular dichroism (CD) spectroscopic measurements. Morphological analysis by atomic force microscopy (AFM) and scanning electron microscopy (SEM) were complemented by the measurements of their bulk properties by thermal stability and rheological studies. Specific molecular recognition events (1/3 vs 2/3) and solvent effects (isooctane vs dodecane) were found to be critical in the formation of chiral aggregates. Theoretical studies were also carried out to understand the interactions responsible for the formation of the superstructures.
ISSN:0743-7463
1520-5827
DOI:10.1021/la1029905