Please use this identifier to cite or link to this item: http://lib.jncasr.ac.in:8080/jspui/handle/10572/2147
Title: Reversible Polymorphism, Liquid Crystallinity, and Stimuli-Responsive Luminescence in a Bola-amphiphilic pi-System: Structure-Property Correlations Through Nanoindentation and DFT Calculations
Authors: Roy, Syamantak
Hazra, Arpan
Bandyopadhyay, Arkamita
Raut, Devraj
Madhuri, P. Lakshmi
Rao, D. S. Shankar
Ramamurty, Upadrasta
Pati, Swapan Kumar
Prasad, S. Krishna
Maji, Tapas Kumar
Keywords: Chemistry
Materials Science
Physics
Center-Dot-O
Mechanochromic Luminescence
Molecular Tectonics
Hydrogen-Bond
Behavior
Design
Water
Issue Date: 2016
Publisher: American Chemical Society
Citation: Roy, S.; Hazra, A.; Bandyopadhyay, A.; Raut, D.; Madhuri, P. L.; Rao, D. S. S.; Ramamurty, U.; Pati, S. K.; Prasad, S. K.; Maji, T. K., Reversible Polymorphism, Liquid Crystallinity, and Stimuli-Responsive Luminescence in a Bola-amphiphilic pi-System: Structure-Property Correlations Through Nanoindentation and DFT Calculations. Journal of Physical Chemistry Letters 2016, 7 (20), 4086-4092 http://dx.doi.org/10.1021/acs.jpclett.6b01891
Journal of Physical Chemistry Letters
7
20
Abstract: We report the design, synthesis, detailed characterization, and analysis of a new multifunctional pi-conjugated bola-amphiphilic chromophore: oligo-(p-phenyleneethynylene)-dicarboxylic acid with dialkoxyoctadecyl side chains (OPE-C-18-1). OPE-C-18-1 shows two polymorphs at 123 K (OPE-C-18-1') and 373 K (OPE-C-18-1 ''), whose crystal structures were characterized via single crystal X-ray diffraction. OPE-C-18-1 also exhibits thermotropic liquid crystalline property revealing a columnar phase. The inherent pi-conjugation of OPE-C-18-1 imparts luminescence to the system. Photoluminescence measurements on the mesophase also reveal similar luminescence as in the crystalline state. Additionally, OPE-C-18-1 shows mechano-hypsochromic luminescence behavior. Density functional theory (DFT)-based calculations unravel the origins behind the simultaneous existence of all these properties. Nanoindentation experiments on the single crystal reveal its mechanical strength and accurately correlate the molecular arrangement with the liquid crystalline and mechanochromic luminescence behavior.
Description: Restricted Access
URI: http://hdl.handle.net/10572/2147
ISSN: 1948-7185
Appears in Collections:Research Articles (Swapan Kumar Pati)
Research Articles (Tapas Kumar Maji)

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