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Applicant:
Indian Institute of Technology (IIT) Patna 
Author:
S. Mallik, A. Nayak, S. Daschakraborty, S. Kumar, and K. A. Suresh 
Corresponding Authors:
A. Nayak 
DOI #:
10.1002/slct.201800601 
Title:
Supramolecular Self-Assembly of Ionic Discotic Liquid Crystalline Dimer with DNA at Interfaces 
Journal:
Chemistry Select 
Year:
2018 
Volume:
Page:
7318 
Keywords:
Self-Assembly, DNA 
Abstract:
Nanoarchitectonics through ionic self-assembly at interfaces isan attractive approach to obtain advanced functional materials.Here, a novel discotic dimer-DNA complex hybrid system hasbeen investigated at air-water and air-solid interfaces. The ionicdiscotic liquid crystalline dimer consisted of two triphenylenecores linked via alkyl spacer with a imidazolium moiety. At air-water interface, the dimer formed a stable monolayer with areversible collapse. The surface manometry results suggestedthat the condensed phase of the monolayer consisted ofmolecules arranged in an edge-on conformation. To understandthe folding behavior of the molecules, DFT calculations were carried out which showed that the quantum chemicallyoptimized folded-form of the molecule was electronically morestable than its unfolded-form. Upon adding DNA to thesubphase, a complex monolayer was formed with enhancedstability as was indicated by increased collapse pressure anddecreased limiting area. Importantly, this complexation enabledan efficient and stable multilayer formation on silicon sub-strates with layers as many as 40. Since both DNA and discoticdimer molecules share common properties of one-dimensionalcharge transport with compatible structures, this complex filmcould serve as a model system for organic electronics 
Entered by:
Venkata Dantham on 2020-08-02 
 
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