Hydrogen bond-driven columnar self-assembly of electroluminescent D-A-D configured cyanopyridones

D. R. Vinayakumara, Hidayath Ulla, Sandeep Kumar, Anup Pandith, M. N. Satyanarayan, D. S.Shankar Rao, S. Krishna Prasad, Airody Vasudeva Adhikari

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21 Citations (Scopus)


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.

Original languageEnglish
Pages (from-to)7385-7399
Number of pages15
JournalJournal of Materials Chemistry C
Issue number27
Publication statusPublished - 2018
Externally publishedYes

ASJC Scopus subject areas

  • General Chemistry
  • Materials Chemistry


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