Title:	Hydrogen bond-driven columnar self-assembly of electroluminescent D–A–D configured cyanopyridones
Authors:	Vinayakumara, D.R. Ulla, Hidayath Kumar, Sandeep Pandith, Anup Satyanarayan, M N Rao, Shankar D.S. Prasad, Krishna S. Adhikari, A.V.
Issue Date:	Jul-2018
Publisher:	Royal Society of Chemistry
Citation:	Journal of Materials Chemistry C, 2018, Vol.6, p7385-7399
Abstract:	Herein, we report the design and synthesis of a new series of flying bird-shaped liquid crystalline (LC) cyanopyridone derivatives with a D–A–D architecture, CPO-1 to CPO-4. Their mesomorphic, photophysical, electrochemical, and electroluminescence characteristics have been investigated in detail. Here, the H-bonding interactions through a central lactam core were shown to be the key driving force for their self-assembly into columnar mesophases. The key role of H-bonding has been confirmed by using newly synthesized similar shaped compounds, MCP-1 to MCP-3. New CPO mesogens were found to be intense greenish blue light emitters with narrow band-gap energies. Conclusions were drawn based on theoretical studies also. Finally, the application potential of the selected mesogen CPO-2 as an emissive material has been demonstrated for the fabrication of doped and non-doped OLED devices with different device architectures, which displayed encouraging results. In fact, this is the first report on the use of emissive H-bond-assisted columnar liquid crystals in devices. The present results provide a new guideline and a versatile approach to the design of new LC molecules for the fabrication of efficient OLEDs.
Description:	Restricted Access.
URI:	http://hdl.handle.net/2289/7093
ISSN:	2050-7526
Alternative Location:	https://pubs.rsc.org/en/content/articlelanding/2018/tc/c8tc01737a#!divAbstract
Copyright:	2018 Royal Society of Chemistry
Appears in Collections:	Research Papers (SCM)

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